STORM REPORT

Tropical Storm Nora - September 1997

 

 

Prepared by the

Flood Control District of Maricopa County

2801 W. Durango Street

Phoenix, Arizona 85009

(602) 506-1501

 

 

  

by:

Stephen D. Waters

Senior Hydrologist / ALERT Program Coordinator

Engineering Division, Special Projects Branch

 

Table of Contents

  

   

Introduction 1

 

Meteorology 2

 

Rainfall 4

 

Runoff 12

 

ALERT System Performance 15

 

Summary 17

 

 

Appendix A: NWS Advisories, Watches, and Warnings 18

 

Appendix B: Hourly Precip. Amounts for Selected Automatic Stations 22

 

Appendix C: Maricopa County Rain Gage Map 43

 

Appendix D: Selected Digital Photos 44

 

Appendix E: Rainfall Data Recorded at Harquahala Mtn. Gage No. 5185 46

 

 

 

INTRODUCTION

 

The purpose of this report is to present in a concise manner selected rainfall, runoff, and statistical data from the storm event (Tropical Storm Nora) of September 25th and 26th, 1997, which was most intense in the northwest portion of the County. The majority of the data presented was collected by the Flood Control District's (FCD) ALERT system, with contributions from the Phoenix National Weather Service (NWS) Forecast Office.

 

The goal of this report is to present and record data for general information purposes, and as a guide for future prediction of water levels and discharge rates for FCD structures, particularly the Wickenburg Dams and Washes, the Hassayampa River, and Centennial, Tiger and Jackrabbit Washes.


 

METEOROLOGY

The synoptic history of Hurricane Nora is paraphrased from a preliminary report by Edward N. Rappaport of the National Hurricane Center…

Hurricane Nora formed early on the 16th of September about 250 nautical miles to the southwest of Acapulco. It originated in a large area of disturbed weather that had slowly become better organized while drifting west-northwestward during the previous few days. Analysis of satellite pictures indicates that this activity was likely related to a westward-moving tropical wave that crossed from Africa into the Atlantic hurricane basin on the 30th and 31st of August. The northern part of the wave was associated with the formation of Hurricane Erika in the central tropical Atlantic, while the southern part continued westward through the Caribbean Sea and northern South America, and arrived in the eastern Pacific basin on September 12th.

Nora matured in an environment of relatively light wind shear, and much of its development appears to have been related to variations in sea-surface temperature (SST). Nora formed over very warm water (29-30° C). Deep convection quickly increased and became organized in well-defined bands on the 16th, and further strengthening occurred over the next two days. The first signs of what would become a rather large and ragged eye were detected in infrared satellite pictures early on the 18th. By late that day, Nora was a hurricane with 90-knot sustained winds.

During Nora's first few days, the winds around a mid-level high over northern Mexico helped direct the tropical cyclone slowly toward the west-northwest. From midday on the 18th to early on the 20th, however, Nora nearly stalled and weakened significantly. The height, amount and organization of convection decreased and the eye disappeared. The maximum wind is estimated to have decreased to 65-knots. This weakening is presumed to have occurred in response to the hurricane's prolonged stay over waters cooled by upwelling beneath its circulation. Analyses in this part on Nora's wake show SSTs cooled by about 2° C, on average, to about 27° C.

By late on the 20th, Nora was on the move again, at 5 to 10 knots toward the west-northwest, roughly parallel to the southwest coast of Mexico. Nora then rapidly restrengthened and the eye reappeared, initially with a diameter of 15 nautical miles. Nora reached its peak maximum wind speed of 115-knots near 1200 UTC (Zulu) on the 21st.

On the 21st through 23rd, Nora's track converged with and then followed the track previously taken by Hurricane Linda. In that area, Linda had been the strongest eastern Pacific hurricane on record jest a few weeks earlier and its circulation had induced lower SSTs. Nora gradually weakened over Linda's wake, with the eye temporarily broadening to a diameter of about 50 nautical miles and the eyewall becoming broken. Estimated wind speeds decreased to about 70-knots at 1800 UTC on the 23rd.

An omega-like blocking pattern developed over the western United States during the last week of September. This left a weakness in the height pattern to the north of Nora and eventually a trough with a cut-off low to the northwest of the hurricane. The track of Nora became north-northwestward and then northward on the 24th. This carried Nora over yet another SST anomaly, a large area of water more than 2° C above normal abutting the west coast of Baja California. Nora remained over waters of at least 26° C all the way to its landfall on the morning of the 25th at Punta Euguenia and then about 50 nautical miles south-southeast of San Fernando, Baja California. Hence, Nora had restrengthened slightly, and then weakened less quickly than most tropical cyclones in that area. It was still at hurricane strength during its landfalls (on Mexico and the US).

Nora was accelerating northward at landfall, steered by the flow associated with the trough to its northwest. The center of the cyclone crossed the Baja California peninsula at 20-25 knots and traveled up the western shoreline of the Gulf of California. It crossed in the United States near the CA/AZ border, still a tropical storm, at approximately 2100 UTC (2:00 PM MST) on the 25th. Most of the heavy precipitation was then located to the northeast of the storm center.

Rapid weakening ensued and winds dropped to tropical depression strength near 0000 UTC (5:00 PM MST on the 25th) on the 26th, when the center was located about midway between Blythe and Needles, California. The low-level center was moving toward the north-northeast as it degenerated early on the 26th (which was late on the 25th in MST). A remnant circulation aloft persisted and is likely to have been responsible for a period of near hurricane-force winds observed at the NWS Cedar City Doppler radar, located in the mountains of southwestern Utah at an elevation of about 10,600 feet.

The residual area of cloudiness and showers gradually became more diffuse over the following two days while moving generally northeastward, through portions of Utah, Colorado, Idaho and Wyoming.

 

 

 

RAINFALL

 

Rainfall amounts were highest in the northwestern portion of Maricopa County, in eastern La Paz County and in the western and southern Bradshaw Mountains in Yavapai County (Figure 2).

The calculated 24-hour, 100-year rainfall amount in NW Maricopa County is approximately 4.20 inches. This amount was exceeded at six ALERT measuring sites (Table 1).

Three ALERT gages recorded more than five (5) inches of rain, eight gages recorded more than four (4) inches, twenty-six gages recorded more than three (3) inches, thirty-nine gages recorded more than two (2) inches and fifty-one gages recorded more that one (1) inch of rain.

Figure 1 shows selected hyetal bar-graphs for four ALERT stations in northwest Maricopa County.

Figures 3-10 show spatially the distribution of storm total rainfall recorded at ALERT rainfall stations in the affected Meteorological Services Project zones.

Table 2 presents storm-total rainfall amounts measured at regional airports and by National Weather Service cooperative observers.

 

FIGURE 1

 

 

Tropical Storm Nora Rainfall Totals

Amounts > 1.00 Inch for 9/25/97 10:00 through 9/26/97 18:00

SENSOR_NAME

SENSOR_ID_#

ELEVATION

AMOUNT

LOCATION

Harquahala Mtn.

5185

5681

11.97 *

Top of Harquahala Mtn., 36 mi. WSW of Wickenberg

Yarnell Hill

5290

5128

6.65

1 mi. ENE of Yarnell, Yavapai County

Wilhoit

5365

5043

5.39

At Wilhoit, 10 mi. SSW of Prescott, Yavapai County

Mt. Union

5380

7495

4.57

Top of Mt. Union, 10 mi. SSE of Prescott

Centennial Wash

5180

2417

4.53

1 mi. N of US 60, 19 mi. W of Wickenburg

Horsethief Basin

5700

6702

4.37

At HB Recreation Area, 6 mi. SE of Crown King

Tiger Wash Fan

5140

1605

4.17

1 mi. W of Eagle Eye Rd. and 4 mi. N of Salome Highway

Gladden

5170

2198

4.06

US 60 at Gladden, 34 miles W of Wickenburg

Hassy R. @ Box Canyon

5305

2245

3.98

6 mi. N of Wickenburg on Hassayampa River, Yavapai Co.

Casandro Wash

7090

2240

3.94

On US 60 bridge, 2 mi. West of US 60 / US 93

Crown King

5715

6783

3.90

Crown King, Bradshaw Mtns, 24 mi. SSE of Prescott

Flores West

7025

2625

3.90

Along US 93, 3.2 mi. NW of the US 93 / US 89 junction

Upper Tiger Wash

5130

2198

3.82

11 mi. S. of Aguila off Eagle Eye Road

O'Brien

5320

2798

3.70

11 mi. NE of Wickenburg, Yavapai County

Casandro Dam

7130

2180

3.70

1.1 miles W of the US60 / US93 intersection

Hartman Wash

7060

2488

3.66

On US 60 bridge, 6.3 mi. West of US 60 / US 93

Towers Mtn.

5340

7528

3.62

3 mi. NW of Crown King, Yavapai County

Martinez Creek

7010

2300

3.43

1 mi. East of the US 93 / US 89 junction

Sols Tank

7030

2690

3.43

6.3 mi. WNW of the US 93 / US 89 junction

Mid-Martinez Creek

7005

2725

3.39

4.4 mi SSE of the US 89 / SR 71 junction

Flying E Tank

7070

2480

3.31

6.3 mi. WSW of the US 93 / US 89 junction at Wickenburg

Sunset FRS

5230

2100

3.15

3/4 mi. WSW of the US 60 / US 93 intersection in Wickenburg

Stanton

7000

3250

3.15

6.5 mi. East of Congress, Yavapai County

Vulture Mine

5260

2311

3.11

3 mi. SW of Wickenburg

Hassy R. @ Wagoner Rd.

5350

3785

3.03

6 mi. ESE of Kirkland Junction

Black Mountain

7050

2617

3.03

Along US 60, 9 mi. West of US 60 / US 93

Flying E Wash

7080

2302

2.99

On US 60 bridge, 3 mi. West of US 60 / US 93

Minnehaha

5335

5602

2.95

8 mi. E of Wagoner, Yavapai County

Sols Wash nr Matthie

7040

2220

2.95

Sols Wash at SPRR bridge, 2 mi. N. of Wickenburg Airport

Hassy R. @ US 60

5225

2035

2.87

Hassayampa River at US 60/93 in Wickenburg

Black Hill

7035

2560

2.83

2.3 miles WSW of the US 93 / US 89 junction

Smith Peak

5190

5131

2.80

Harcuvar Mtns., 13 mi. NW of Aguila

Wickenburg Airport

7120

2383

2.80

4.5 mi. West of the US 60 / US 93 junction

Sunnycove FRS

5245

2200

2.76

1 mi. SW of the US 60 / US 93 intersection in Wickenburg

Congress

7020

3000

2.64

Junction of US 89 and SR 71

Powder House Wash

7110

2120

2.64

1/2 mi. NE of US 60 and Constellation Rd., Wickenburg

Gila Bend Mountains

5050

1620

2.44

16 mi NW of Painted Rock Dam off Agua Caliente Rd.

Constellation Road

7100

2220

2.36

1.4 mi. NE of the US 60 / US 93 junction

Sunset Point

5730

3378

2.09

Sunset Point Rest Area on I-17, 10 mi. N of Black Canyon City

Arizona Hunt Club

5775

3805

1.97

5 mi. NNW of Cordes Junction

Columbia Hill

5685

2393

1.85

5 mi. NNW of Castle Hot Springs

Centennial Levee

5120

1298

1.81

2 mi S. of I-10, 1 mi. E. of W. County border, Harquahala Valley

Jackrabbit Wash

5215

1798

1.77

16 mi. NNE of Tonopah, 20 mi. SSW of Wickenburg

Prescott Valley

5820

5228

1.77

5 mi. N of the intersection of SR 69 and Roberts Rd.

Dewey

5805

4775

1.73

5 mi. E of Dewey off Orme Ranch Rd.

Sols Wash

5275

2771

1.54

Intersection of SR 71 and US 93, 16 mi. NW of Wickenburg

Saddleback FRS

5110

1177

1.46

7 mi. WSW of Tonopah in Harquahala Valley

Narrows Dam

5150

1960

1.34

5 mi. SE of Salome off Salome Highway

Mt. Oatman

5000

1720

1.26

8 mi. WSW of Painted Rock Dam

I-17 @ 169

5790

4750

1.18

I-17 at SR 169 (Cherry Rd.)

Harquahala FRS

5125

1420

1.02

10 mi. WNW of Tonopah in Harquahala Valley

* New State record for a 24-hour period

TABLE 1

 

 

FIGURE 2

 

Figure 3: Upper Agua Fria Watershed

 

Figure 4: Upper Hassayampa and Castle Creek Watersheds

 

Figure 5: Town of Wickenburg and Surrounding Area

 

Figure 6: Centennial Wash Watershed

 

Figure 7: Eagletail and Palo Verde Forecast Zones

 

Figure 8: Waterman and Sauceda Wash Watersheds

Figure 9: West Valley Forecast Zone

 

Figure 10: New River / Skunk Creek / Cave Creek Forecast Zone

 

 

Table 2

Additional Rainfall Reports from Airports and NWS Coop. Sites

  STATION

STORM TOTAL (inches)

Alamo Lake State Park, AZ

2.10

Blythe City, CA

2.78

Blythe, CA Airport

2.03

Calexico, CA

3.30

Dateland Ranch, AZ

1.80

Eagle Mountain, CA

1.40

Ehrenberg, AZ

1.06

El Centro, CA

1.48

Imperial, CA Airport

0.96

Iron Mountain, CA

1.83

Niland, CA

1.23

Ocotillo, CA

1.88

Parker Reservoir, CA

2.15

Salome, AZ

3.60

Sky Harbor Airport, Phoenix, AZ

0.03

Yuma Citrus Station, AZ

2.02

Yuma Marine Corps Naval Air Station, AZ

3.59

 

 

RUNOFF

Rainfall intensities and volumes were high enough to cause runoff mainly in the southwest, west and northwestern portions of Maricopa County, as well as in the Hassayampa watershed in Yavapai County and in eastern La Paz County. Major watercourses which experienced significant flow events were the Hassayampa River, Sols Wash, Martinez Creek, Centennial Wash, Grass Wash, Jackrabbit Wash, Tiger Wash and Winters Wash. Table 4 lists recorded peak discharges and times at selected FCDMC and USGS stream gaging sites. Figure 11 shows a collage of storm hydrographs in the Wickenburg area.

The only Flood Control District structures significantly affected by Nora were in the Wickenburg area: Sunset FRS (39.5% full), Sunnycove FRS (13.9% full), and Casandro Dam (45.0% full). Table 3 lists the impoundment statistics for these dams.

The big runoff story of TS Nora was Narrows Dam on Centennial Wash in La Paz County. The dam began filling around 5:00 PM on September 25th, reached the emergency spillway elevation (18.2 ft.) at around 3:30 PM on the 26th, and reached a maximum depth of 20.68 ft. at 8:50 PM on the 26th. The water surface remained fairly constant until 10:45 PM, when it started to fall noticeably. A falling-rate alarm sounded on the ALERT computer at 20 minutes after midnight on the 27th, and the water level fell below the emergency spillway elevation at approximately 1:25 AM. Unfortunately, FCD did not possess a stage/storage curve for the pool area, and thus was unable to determine whether the drop in water-surface was due to failure or spillway outflow. Field reconnaissance at daybreak on the 27th revealed two large breaches, one near the middle of the dam and one on the north end. Each breach was about 100 feet wide and probably caused by piping. At some point during the night the north breach captured the entire outflow from the pool area. The water level returned to its dry-state elevation (6.6 ft.) at approximately 4:00 AM on the 28th. Appendix 4 contains some digital photos of the dam and pool area in pre- and post failure condition, and Figure 12 compares the fill-hydrograph at Narrows Dam with the rainfall hyetograph from the Gladden rain gage.

 

TABLE 3: Wickenburg Dam Impoundment Statistics

 

DAM

Volume (ac-ft)

% Full

Stage (feet)

Sunset FRS

34

39.5

12.27

Sunnycove FRS

30

13.9

17.19

Casandro Dam

65

45.0

11.30

 

 

 

 

TABLE 4: Recorded Peak Discharges and Times at Selected FCDMC and USGS Stream Gaging Sites

Gage Name

ID No.

Peak Q

(cfs)

Date

Time

Peak Q Return Period

(years)

Centennial Wash above Narrows Dam

NA

8,100 (2)

9/26/97

20:20 (1)

7

Narrows Dam Outflow

5153

2,610

9/26/97

20:50

NA

Hassayampa R. @ US60

5228

15,376

9/26/97

05:30 (1)

8

Hassayampa R. @ I-10

5283

7,440

9/26/97

15:00 (1)

5

Hassayampa R. @ Box Canyon

5308

3,549

9/26/97

09:21

<2

Martinez Creek

7013

10,300 (3)

9/26/97

04:28

20

Sols Wash nr Matthie

7043

7,977

9/26/97

04:14

12

Hartman Wash @ US60

7063

1,253

9/26/97

05:44

6

Flying E Wash @ US60

7083

1,145 (3)

9/26/97

05:51

12

Casandro Wash

7093

177 (3)

9/26/97

04:30 (1)

20

Powderhouse Wash

7113

387

9/26/97

04:43

13

Hassayampa R. near Morristown

5223

09516500

11,800

9/26/97

07:30

6

Jackrabbit Wash

09516800

9,710 (2)

13

Hassayampa R. near Arlington

09517000

2,900

9/26/97

16:30 (1)

7

Tiger Wash

09517280

8,000 (2)

30

Centennial Wash @ SPRR

5103

09517490

1,400

9/26/97

01:45

<2

  1. Time of Peak is estimated.
  2. Peak Q estimated using slope-area method from crest-stage gage, no time information available.
  3. Peak Q modified using slope-area survey.

 

ALERT SYSTEM PERFORMANCE

The overall performance of the ALERT system during this storm event was very good. All but one (Cave Creek at Cactus) of the 209 rain gages performed during the storm. All 82 weather sensors operated throughout the storm. However, pressure transducers did not fare as well with either partial or total failures at Casandro Wash, Casandro Dam, Sunnycove FRS, Hassayampa River at I-10 and Powderhouse Wash. Peak discharges and impoundment volumes at these sites were estimated from high-water marks, and in some cases checked by slope-area survey.

A record of ALERT alarms is presented in Table 5. Eleven rain gages and ten water-level gages reached ALERT alarm criteria during the storm. Warnings and information relayed by ALERT room staff included:

  

Table 5

Historical ALERT Alarm Log: Tropical Storm Nora

Alarm Action 1, Alarms: 0 3 5 6

ID Name TYPE and cause Date Time

--------------------------------------------------------------------------

5140 Tiger Wash Fan DEV rainfall rate 09/25/1997-15:44:16

5185 Harquahala Mtn. DEV rainfall rate 09/25/1997-15:58:26

7083 Flying E Wash DEV upper limit 09/25/1997-17:27:52

5103 Centennial Railroad DEV upper limit 09/26/1997-00:59:51

7025 Flores West DEV rainfall rate 09/26/1997-02:37:43

7010 Martinez Creek DEV rainfall rate 09/26/1997-03:19:31

7060 Hartman Wash DEV rainfall rate 09/26/1997-03:23:15

7070 Flying E Tank DEV rainfall rate 09/26/1997-03:29:37

7043 Sols Wsh nr Matthie DEV upper limit 09/26/1997-03:30:23

7120 Wickenburg Airport DEV rainfall rate 09/26/1997-03:33:28

7040 Sols Wsh nr Matthie DEV rainfall rate 09/26/1997-03:37:34

7063 Hartman Wash DEV upper limit 09/26/1997-03:39:59

7013 Martinez Creek DEV upper limit 09/26/1997-03:40:58

7090 Casandro Wash DEV rainfall rate 09/26/1997-03:41:22

5305 Hassy @ Box Canyon DEV rainfall rate 09/26/1997-03:43:33

7130 Casandro Dam DEV rainfall rate 09/26/1997-03:46:22

5233 Sunset FRS DEV upper limit 09/26/1997-03:56:27

5228 Hassayampa @ US60 DEV upper limit 09/26/1997-05:00:50

7133 Casandro Dam DEV upper limit 09/26/1997-05:49:55

5223 Hassy nr Morristown DEV upper limit 09/26/1997-06:09:43

5153 Narrows Dam DEV upper limit 09/26/1997-12:06:10

5153 Narrows Dam DEV falling rate 09/27/1997-00:19:49

Note: Many of the above alarms occurred more than once, in which case only the first occurrence is listed.

Stations that would have alarmed but were inoperable during the event:

          1. Casandro Wash PT
          1. Casandro Dam PT - should have alarmed earlier
          1. Sunnycove FRS PT

5283 Hassayampa R. @ I-10

SUMMARY

This report presented rainfall, discharge and impoundment data from the Flood Control District's ALERT data collection system and other sources for Tropical Storm Nora, September 25-26, 1997. The greatest rainfall amounts were recorded in the western and west-central portions of the County. Significant runoff events occurred on several small and medium-sized washes in the Wickenburg area, as well as on the Hassayampa River, Tiger Wash, Jackrabbit Wash and Centennial Wash. Narrows Dam on Centennial Wash near Salome breached as a result of the impoundment from this and possibly previous storms in August. The performance of the ALERT system was exemplary, allowing operators to disseminate advisories and information in a timely manner according to District policy.

Observations for future consideration:

      1. A stage/storage relationship for the pool area was not available;
      2. It was the middle of the night and access to the dam had been cutoff;
      3. No dam-failure models had been produced.

To minimize the occurrence of a similar situation, staff must be sure to have an accurate stage/storage table for each instrumented dam, and should create for each instrumented dam a graph showing a typical fill/drain hydrograph versus a failure hydrograph.

 

Appendix A: NWS Advisories, Watches, and Warnings

 

BULLETIN - EAS ACTIVATION REQUESTED

FLASH FLOOD WARNING

NATIONAL WEATHER SERVICE PHOENIX AZ

708 PM MST THU SEP 25 1997

FLASH FLOOD WARNING FOR

NORTHWESTERN MARICOPA COUNTY IN CENTRAL ARIZONA

NORTHERN AND EAST CENTRAL LA PAZ COUNTY IN WEST CENTRAL ARIZONA

UNTIL 9:00 PM MST

SOME LOCATIONS AFFECTED

AGUILA

GLADDEN

WICKENBURG

VICKSBURG

SALOME

WENDEN

ALAMO STATE PARK

AT 705 PM MST RADAR CONTINUED TO SHOW MODERATE TO LOCALLY HEAVY RAIN CONTINUEING OVER THE WARNING AREA. IN ADDITION AUTOMATIC RAIN GAGES IN THE WARNING AREA WERE RECEIVING IN EXCESS OF THREE-QUARTERS /0.75/ OF AN INCH OF RAIN PER HOUR. AS A RESULT…FLASH FLOODING IS OCCURRING OR IMMINENT IN THE WARNING LOCATIONS.


 

BULLETIN

TROPICAL DEPRESSION NORA ADVISORY NUMBER 30

NATIONAL WEATHER SERVICE MIAMI FL

8 PM PDT THU SEP 25 1997

 

… NORA DYING OVER THE SOUTHWESTERN UNITED STATES…STILL A HEAVY RAIN THREAT…

 

NORA HAS WEAKENED TO A TROPICAL DEPRESSION AND IS EXPECTED TO DISSIPATE IN A DAY OR SO.

AT 8 PM PDT …0300Z… THE CENTER OF TROPICAL DEPRESSION NORA WAS LOCATED NEAR LATITUDE 35.0 NORTH… LONGITUDE 114.7 WEST OR ABOUT 50 MILES WEST-SOUTHWEST OF KINGMAN ARIZONA.

NORA IS MOVING TOWARD THE NORTH NEAR 25 MPH AND A GRADUAL TURN TOWARD THE NORTH-NORTHEAST IS EXPECTED DURING THE NEXT 24 HOURS.

ESTIMATED MINIMUM CENTRAL PRESSURE IS 998 MB… 29.47 INCHES.

ADDITIONAL RAINFALL TOTALS OF 1 TO 3 INCHES… WITH ISOLATED LARGER AMOUNTS ARE POSSIBLE IN ASSOCIATION WITH NORA. HEAVIEST RAINS ARE NORTH AND EAST OF THE CENTER. THIS ACTIVITY WILL CONTINUE TO SPREAD NORTHWARD AND NORTHEASTWARD… AND COULD CAUSE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES. SEE STATEMENTS FROM LOCAL NATIONAL WEATHER SERVICE OFFICES.

THIS IS THE LAST PUBLIC ADVISORY ISSUED BY THE NATIONAL HURRICANE CENTER ON NORA.


 

FLASH FLOOD STATEMENT

NATIONAL WEATHER SERVICE PHOENIX AZ

906 PM MST THU SEP 25 1997

…FLASH FLOOD WARNING FOR NORTHWEST MARICOPA AND PORTIONS OF NORTHERN AND EAST CENTRAL LA PAZ COUNTIES EXPIRED…

AT 855 PM PHOENIX AND YUMA DOPPLER RADAR SHOWED THE FOCUS OF THE HEAVIEST RAINS HAD SHIFTED INTO MOHAVE AND YAVAPAI COUNTIES.. WITH MOSTLY SPOTTY LIGHT SHOWERS OR SPRINKLES CONTINUING OVER LA PAZ AND NORTHWEST LA PAZ COUNTIES. THUS THE WARNING ISSUED EARLIER WAS ALLOWED TO EXPIRE.

ALTHOUGH THE RAIN HAS TAPERED OFF FOR THE MOST PART… WASHES WILL CONTINUE RUNNING IN THE AREA AND FLOODING OF SECONDARY ROADS WILL PERSIST UNTIL AT LEAST 11 PM.. THUS AN URBAN AND SMALL STREAM FLOOD ADVISORY WILL BE ISSUED SHORTLY FOR NORTHWEST MARICOPA AND PORTIONS OF NORTHERN AND EAST CENTRAL LA PAZ COUNTIES.

HEAVY RAIN BETWEEN 7 AND 8 PM CAUSED EXTENSIVE FLOODING IN THE TOWN OF AGUILA.. WITH REPORTS OF SIX INCHES OF STANDING WATER ON SOME PROPERTIES AND ROADS. THERE WAS ALSO WATER FLOWING ACROSS EAGLE EYE ROAD IN WESTERN AGUILA.


URBAN AND SMALL STREAM FLOOD ADVISORY

NATIONAL WEATHER SERVICE PHOENIX AZ

1101 PM MST THU SEP 25 1997

…URBAN AND SMALL STREAM FLOOD ADVISORY FOR NORTHWEST MARICOPA AND PORTIONS OF NORTHERN AND EAST CENTRAL LA PAZ COUNTIES EXPIRED…

ISOLATED SHOWERS WILL PERSIST OVER PORTIONS OF LA PAZ AND MARICOPA COUNTIES. THE SHOWERS WERE MOVING RAPIDLY NORTH… NEAR 25 MPH. THUS ANY HEAVY SHOWERS THAT FORM OR MOVE ACROSS THE AREA ARE EXPECTED TO BE BRIEF. ADDITIONAL RAINFALL AMOUNTS ARE ANTICIPATED TO AVERAGE UNDER A QUARTER OF AN INCH THROUGH 1 AM… HOWEVER THERE COULD BE LOCALLY HIGHER AMOUNTS WHERE HEAVY SHOWERS MOVE ACROSS. OTHERWISE SIGNIFICANT RAIN IS NOT EXPECTED TO FALL ACROSS THE AREA THROUGH EARLY FRIDAY MORNING… THUS THE ADVISORY WAS ALLOWED TO EXPIRE.

ALTHOUGH SHOWERS HAVE BECOME ISOLATED AND MOSTLY LIGHT… WASHES IN THE AREA WILL CONTINUE RUNNING DURING THE NIGHT.


BULLETIN - EAS ACTIVATION REQUESTED

FLASH FLOOD WARNING

NATIONAL WEATHER SERVICE PHOENIX AZ

352 AM MST FRI SEP 26 1997

FLASH FLOOD WARNING FOR NORTHWESTERN MARICOPA COUNTY IN CENTRAL ARIZONA UNTIL 645 AM MST

 

SOME LOCATIONS AFFECTED

WICKENBURG AND AGUILA

STATE ROUTE 71 AND US HIGHWAY 60 IN NORTHERN MARICOPA COUNTY

 

AT 345 AM MST RADAR ESTIMATED RAINFALL RATES OF 1 TO 2 INCHES DURING THE PAST 2 TO 3 HOURS IN NORTHWEST MARICOPA COUNTY. AS A RESULT… FLASH FLOODING IS OCCURRING OR IMMINENT IN THE WARNING LOCATIONS.

AT 330 AM A SPOTTER IN WICKENBURG REPORTED WASHES RUNNING ALONG WITH 2 INCHES OF RAINFALL SINCE THURSDAY AFTERNOON.

RESIDENTS OF WICKENBURG SHOULD USE CAUTION IF TRAVEL IS NECESSARY EARLY THIS MORNING… AS SOME SECONDARY ROADS IN LOW-LYING AREAS MAY BE COVERED BY FLOODWATERS.


BULLETIN - EAS ACTIVATION REQUESTED

FLASH FLOOD WARNING

NATIONAL WEATHER SERVICE PHOENIX AZ

640 AM MST FRI SEP 26 1997

FLASH FLOOD WARNING FOR NORTHWESTERN MARICOPA COUNTY IN CENTRAL ARIZONA

UNTIL 800 AM MST

SOME LOCATIONS AFFECTED

WICKENBURG AND SOUTHWARD ALONG THE HASSAYAMPA RIVER TO MORRISTOWN

 AT 600 AM MST WICKENBURG POLICE REPORTED SOME EVACUATIONS TAKING PLACE NEAR SOLS WASH IN WICKENBURG. FLASH FLOODING IS LIKELY TO CONTINUE IN THE WARNED AREA AS UP TO 4 INCHES OF RAIN WAS REPORTED IN WICKENBURG SINCE LATE THURSDAY.

PEOPLE IN WICKENBURG SHOULD MONITOR FLOOD CONDITIONS… AND BE PREPARED TO MOVE TO HIGHER GROUND… SHOULD FLOODWATERS THREATEN.


PUBLIC INFORMATION STATEMENT

NATIONAL WEATHER SERVICE PHOENIX AZ

305 PM MST FRI SEP 26 1997

… NORA PRODUCES LOCALLY HEAVY RAIN AND FLASH FLOODING OVER PORTIONS OF FAR SOUTHEAST CALIFORNIA AND WESTERN ARIZONA…

ON THURSDAY… NORA BECAME THE THIRD TROPICAL STORM TO AFFECT ARIZONA THIS CENTURY. THE OTHER TWO TROPICAL STORMS TO AFFECT ARIZONA WERE JOANNE (OCTOBER 1972) AND KATHLEEN (SEPTEMBER 1976). BY DEFINITION… TROPICAL STORMS POSSESS MAXIMUM SUSTAINED SURFACE WINDS RANGING FROM 39 TO 73 MPH. NORA WAS DOWNGRADED FROM A HURRICANE TO A TROPICAL STORM THURSDAY MORNING AFTER CROSSING THE NORTHERN BAJA PENINSULA. NORA CONTINUED TO WEAKEN AND ACCELERATED AS SHE MOVED NORTH INTO THE SOUTHWEST UNITED STATES.

AS NORA PASSED NEAR YUMA THURSDAY AFTERNOON… WINDS WERE SUSTAINED AT 40 MPH WITH GUSTS IN EXCESS OF 50 MPH BETWEEN 2 AND 3 PM. ALTHOUGH NORA CONTINUED TO WEAKEN… SHE OFFICIALLY MAINTAINED TROPICAL STORM STATUS DURING THE REMAINDER OF THE AFTERNOON WHILE TRACKING NORTH ALONG THE LOWER COLORADO RIVER. BY 8 PM… NORA WAS CENTERED 50 MILES WEST-SOUTHWEST OF KINGMAN… AND HAD BEEN DOWNGRADED TO A TROPICAL DEPRESSION.

ALTHOUGH MUCH OF THE PHOENIX METROPOLITAN AREA RECEIVED LITTLE RAIN AND MINIMAL WIND FROM TROPICAL STORM NORA… A SIGNIFICANT RAINFALL EVENT OCCURRED OVER A LARGE PROTION OF WESTERN AND NORTH-CENTRAL ARIZONA AS WELL AS OVER FAR SOUTHEAST CALIFORNIA. RAINFALLS OF 1 TO 4 INCHES WERE COMMON OVER THIS AREA… WITH LOCAL AMOUNTS IN EXCESS OF 5 INCHES. SEVERAL LOCATIONS ALONG OR NEAR THE LOWER COLORADO RIVER… INCLUDING YUMA… RECEIVED AS MUCH RAIN FROM NORA AS THEY TYPICALLY EXPERIENCE DURING AN ENTIRE YEAR.

 

SOME RAINFALL AMOUNTS FROM SOUTHEAST CALIFORNIA AND WESTERN ARIZONA SITES INCLUDE:

MARICOPA COUNTY ARIZONA

WICKENBURG (15 MILES WEST) 4.53 INCHES

GLADDEN 4.02

AGUILA (11 MILES SOUTH) 3.82

GILA BEND MTNS (16NW OF PAINTED ROCK) 2.44

WICKENBURG AIRPORT 2.20

WITTMAN (2 MILES NORTHEAST) 1.73

TONOPAH (7 MILES WEST OF TONOPAH) 1.46

LA PAZ COUNTY ARIZONA

HARQUAHALA MTN 5.97

CENTENNIAL WASH (19 MI W WICKENBURG) 4.21

SMITH PEAK (HARCUVAR MTNS) 2.17

PARKER 1.39

YUMA COUNTY ARIZONA

YUMA 3.83

DATELAND 2.80

IMPERIAL COUNTY CALIFORNIA

IMPERIAL 0.69

RIVERSIDE COUNTY CALIFORNIA

BLYTHE 1.66

SOUTH-CENTRAL SAN BERNADINO COUNTY CALIFORNIA

TWENTYNINE PALMS 2.40

JOSHUA TREE NATIONAL PARK 2.00

 

FLASH FLOODING WAS REPORTED OVER PORTIONS OF YUMA AND LA PAZ COUNTIES THURSDAY … AND OVER PORTIONS OF LA PAZ AND NORTHWEST MARICOPA COUNTIES THURSDAY NIGHT AND FRIDAY MORNING. SOME LOCATIONS AFFECTED BY FLASH FLOODING INCLUDE SOMERTON … YUMA … VICKSBURG … PARKER … WICKENBURG … AND AGUILA.

 

 

 

Appendix B: Hourly Precipitation Amounts for Selected Automatic Stations

 

Storm Period:

September 25th 10:00 AM through

September 26th 6:00 PM

 

 

FCD of Maricopa County ALERT System

Precip 1 : Lower Gila/Centennial

 

DeviceID 5000 5050 5100 5110 5120 5125

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00 0.00

0900 0.00 0.00 0.00 0.00 0.00 0.00

0800 0.00 0.00 0.00 0.00 0.00 0.00

0700 0.00 0.00 0.00 0.00 0.00 0.00

0600 0.00 0.00 0.00 0.00 0.00 0.00

0500 0.00 0.00 0.00 0.00 0.04 0.00

0400 0.00 0.00 0.00 0.00 0.00 0.00

0300 0.00 0.00 0.00 0.00 0.00 0.00

0200 0.00 0.00 0.00 0.00 0.00 0.00

0100 0.00 0.00 0.00 0.00 0.00 0.00

09/25/97

2400 0.00 0.00 0.00 0.00 0.00 0.00

2300 0.00 0.00 0.00 0.00 0.00 0.00

2200 0.00 0.00 0.00 0.00 0.00 0.00

2100 0.04 0.00 0.00 0.00 0.00 0.00

2000 0.00 0.00 0.00 0.00 0.04 0.00

1900 0.00 0.00 0.00 0.08 0.00 0.04

1800 0.00 0.04 0.00 0.04 0.04 0.12

1700 0.04 0.63 0.08 0.35 0.39 0.20

1600 0.28 0.67 0.12 0.59 0.55 0.43

1500 0.35 0.63 0.24 0.16 0.31 0.16

1400 0.20 0.12 0.24 0.16 0.28 0.00

1300 0.20 0.20 0.12 0.08 0.16 0.08

1200 0.16 0.16 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 1.26 2.44 0.79 1.46 1.81 1.02

 

FCD of Maricopa County ALERT System

Precip 2 : Upper Centennial

 

DeviceID 5130 5140 5150 5170 5180 5185 5190

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.28

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.31

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0900 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0800 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0700 0.00 0.00 0.00 0.04 0.00 0.00 0.04

0600 0.00 0.00 0.00 0.00 0.31 0.08 0.00

0500 0.28 0.04 0.00 0.08 0.63 0.43 0.00

0400 0.47 0.16 0.00 0.04 0.20 0.67 0.00

0300 0.20 0.47 0.04 0.08 0.67 0.28 0.00

0200 0.55 1.14 0.00 0.00 0.79 0.24 0.00

0100 0.24 0.08 0.00 0.00 0.08 0.08 0.00

09/25/97

2400 0.08 0.20 0.00 0.08 0.00 0.79 0.00

2300 0.08 0.04 0.00 0.51 0.12 1.30 0.08

2200 0.24 0.12 0.04 0.12 0.04 0.67 0.08

2100 0.04 0.04 0.12 0.20 0.00 0.63 0.08

2000 0.08 0.00 0.04 0.12 0.08 0.87 0.28

1900 0.08 0.00 0.12 0.43 0.39 1.42 0.51

1800 0.16 0.08 0.43 0.51 0.20 1.61 0.47

1700 0.43 0.35 0.08 0.71 0.43 0.75 0.35

1600 0.47 0.71 0.12 0.71 0.28 1.30 0.12

1500 0.24 0.31 0.12 0.24 0.24 0.39 0.16

1400 0.20 0.35 0.16 0.20 0.08 0.31 0.04

1300 0.00 0.08 0.08 0.00 0.00 0.16 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 3.82 4.17 1.34 4.06 4.53 11.97 2.80

 

FCD of Maricopa County ALERT System

Precip 3 : Lower Hassayampa

 

DeviceID 5200 5205 5210 5215 5220 5225

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.04 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00 0.16

0900 0.00 0.00 0.00 0.00 0.08 0.00

0800 0.00 0.00 0.00 0.00 0.28 0.00

0700 0.00 0.00 0.00 0.00 0.00 0.24

0600 0.00 0.00 0.00 0.00 0.00 0.28

0500 0.00 0.00 0.00 0.00 0.00 0.63

0400 0.00 0.00 0.00 0.04 0.00 0.28

0300 0.00 0.00 0.00 0.20 0.00 0.12

0200 0.00 0.00 0.00 0.00 0.00 0.08

0100 0.00 0.00 0.00 0.00 0.00 0.04

09/25/97

2400 0.00 0.00 0.00 0.00 0.00 0.00

2300 0.00 0.00 0.00 0.00 0.00 0.00

2200 0.00 0.00 0.00 0.00 0.00 0.04

2100 0.00 0.00 0.00 0.00 0.04 0.08

2000 0.00 0.00 0.00 0.08 0.08 0.20

1900 0.00 0.00 0.00 0.20 0.00 0.04

1800 0.00 0.00 0.00 0.20 0.04 0.04

1700 0.04 0.08 0.00 0.24 0.24 0.35

1600 0.08 0.04 0.08 0.35 0.04 0.20

1500 0.16 0.00 0.16 0.28 0.08 0.08

1400 0.12 0.04 0.12 0.16 0.00 0.04

1300 0.00 0.00 0.04 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.39 0.16 0.39 1.77 0.87 2.87

 

FCD of Maricopa County ALERT System

Precip 4 : Middle Hassayampa

 

DeviceID 5230 5245 5260 5275 5280 5290 5305

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.04 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.08 0.39 0.00 0.00 0.00

1100 0.00 0.00 0.12 0.08 0.00 0.00 0.00

1000 0.20 0.12 0.16 0.00 0.00 0.04 0.00

0900 0.04 0.04 0.28 0.00 0.00 0.00 0.00

0800 0.00 0.00 0.35 0.00 0.00 0.04 0.00

0700 0.08 0.08 0.31 0.00 0.00 0.16 0.39

0600 0.51 0.35 0.24 0.00 0.00 0.16 0.51

0500 0.55 0.51 0.24 0.04 0.00 0.28 0.71

0400 0.********************** 0.20 1.10

0300 0.04 0.12 0.04 0.04 0.00 1.38 0.08

0200 0.04 0.04 0.08 0.08 0.00 0.87 0.08

0100 0.04 0.04 0.04 0.08 0.00 0.51 0.00

09/25/97

2400 0.04 0.04 0.00 0.04 0.00 0.31 0.04

2300 0.00 0.00 0.04 0.08 0.00 0.59 0.00

2200 0.04 0.00 0.08 0.08 0.00 0.20 0.04

2100 0.12 0.12 0.08 0.08 0.00 0.55 0.08

2000 0.20 0.24 0.16 0.12 0.00 0.98 0.47

1900 0.12 0.08 0.12 0.12 0.00 0.00 0.00

1800 0.04 0.04 0.04 0.08 0.00 0.00 0.00

1700 0.31 0.31 0.24 0.08 0.04 0.16 0.20

1600 0.20 0.24 0.20 0.08 0.08 0.12 0.16

1500 0.08 0.12 0.08 0.04 0.16 0.04 0.04

1400 0.04 0.00 0.04 0.00 0.16 0.08 0.08

1300 0.00 0.00 0.00 0.00 0.04 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 3.15 2.76 3.11 1.54 0.47 6.65 3.98

 

FCD of Maricopa County ALERT System

Precip 5 : Wickenburg 1

 

DeviceID 7000 7005 7010 7020 7025 7030

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.04

1000 0.00 0.00 0.00 0.00 0.04 0.00

0900 0.04 0.04 0.00 0.00 0.00 0.00

0800 0.00 0.00 0.00 0.00 0.00 0.00

0700 0.16 0.08 0.08 0.04 0.00 0.00

0600 0.24 0.16 0.47 0.12 0.20 0.24

0500 0.12 0.16 0.24 0.04 0.55 0.28

0400 0.31 0.12 0.94 0.04 0.04 0.04

0300 0.43 0.71 0.35 0.31 1.22 0.28

0200 0.12 0.43 0.00 0.47 0.47 0.55

0100 0.08 0.08 0.04 0.08 0.04 0.04

09/25/97

2400 0.12 0.04 0.04 0.08 0.04 0.04

2300 0.28 0.24 0.08 0.24 0.08 0.12

2200 0.04 0.00 0.00 0.04 0.04 0.00

2100 0.31 0.16 0.08 0.16 0.08 0.00

2000 0.43 0.47 0.16 0.28 0.20 0.43

1900 0.00 0.12 0.08 0.04 0.04 0.16

1800 0.04 0.12 0.12 0.20 0.20 0.43

1700 0.24 0.24 0.35 0.31 0.35 0.31

1600 0.08 0.12 0.28 0.12 0.20 0.31

1500 0.08 0.08 0.08 0.08 0.08 0.12

1400 0.04 0.04 0.04 0.00 0.04 0.04

1300 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 3.15 3.39 3.43 2.64 3.90 3.43

 

FCD of Maricopa County ALERT System

Precip 6 : Wickenburg 2

 

DeviceID 7035 7040 7050 7060 7070 7080

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00 0.08

0900 0.00 0.00 0.00 0.00 0.08 0.00

0800 0.00 0.00 0.00 0.00 0.00 0.00

0700 0.04 0.12 0.00 0.24 0.04 0.16

0600 0.16 0.31 0.12 0.24 0.39 0.71

0500 0.20 0.16 0.20 0.28 0.24 0.08

0400 0.04 1.02 0.51 1.10 0.79 0.39

0300 0.43 0.08 0.16 0.12 0.04 0.04

0200 0.04 0.00 0.08 0.08 0.04 0.04

0100 0.08 0.00 0.04 0.00 0.04 0.08

09/25/97

2400 0.00 0.04 0.04 0.04 0.04 0.00

2300 0.16 0.08 0.16 0.12 0.16 0.04

2200 0.04 0.04 0.12 0.04 0.00 0.04

2100 0.12 0.16 0.04 0.04 0.04 0.20

2000 0.28 0.08 0.35 0.16 0.20 0.12

1900 0.04 0.12 0.12 0.08 0.08 0.12

1800 0.24 0.16 0.35 0.24 0.16 0.16

1700 0.************************.28

1600 0.35 0.16 0.28 0.31 0.35 0.28

1500 0.16 0.08 0.20 0.16 0.16 0.12

1400 0.04 0.04 0.04 0.08 0.08 0.08

1300 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 2.83 2.95 3.03 3.66 3.31 2.99

 

FCD of Maricopa County ALERT System

Precip 7 : Wickenburg 3

 

 

DeviceID 7090 7100 7110 7120 7130

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.12 0.00 0.00

1100 0.00 0.00 0.12 0.20 0.00

1000 0.04 0.04 0.24 0.00 0.24

0900 0.04 0.00 0.12 0.00 0.00

0800 0.00 0.00 0.24 0.00 0.00

0700 0.24 0.24 0.28 0.00 0.08

0600 0.87 0.20 0.24 0.39 0.83

0500 0.16 0.83 0.24 0.12 0.43

0400 0.83 0.12 0.12 0.94 0.67

0300 0.04 0.16 0.12 0.04 0.04

0200 0.08 0.00 0.00 0.04 0.04

0100 0.04 0.04 0.00 0.00 0.04

09/25/97

2400 0.00 0.04 0.04 0.04 0.04

2300 0.08 0.08 0.00 0.04 0.00

2200 0.00 0.00 0.20 0.00 0.04

2100 0.24 0.00 0.16 0.08 0.12

2000 0.12 0.16 0.00 0.08 0.28

1900 0.28 0.00 0.08 0.08 0.12

1800 0.12 0.04 0.12 0.12 0.08

1700 0.31 0.24 0.12 0.24 0.35

1600 0.28 0.12 0.12 0.24 0.20

1500 0.20 0.04 0.00 0.12 0.12

1400 0.00 0.04 0.00 0.04 0.00

1300 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 3.94 2.36 2.64 2.80 3.70

 

FCD of Maricopa County ALERT System

Precip 8 : Upper Hassayampa

 

DeviceID ******************* 5365 5380

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.16 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.04

1200 0.00 0.00 0.04 0.00 0.00 0.08

1100 0.08 0.00 0.00 0.04 0.00 0.35

1000 0.00 0.00 0.04 0.12 0.31 0.12

0900 0.00 0.00 0.00 0.00 0.43 0.04

0800 0.00 0.04 0.12 0.08 0.35 0.31

0700 0.35 0.04 0.20 0.16 0.28 0.24

0600 0.75 0.63 0.75 0.12 0.47 0.16

0500 0.63 0.28 0.71 0.28 0.28 0.35

0400 0.67 0.12 0.12 0.20 0.55 0.59

0300 0.20 0.08 0.04 0.12 1.22 0.28

0200 0.00 0.04 0.08 0.20 0.28 0.24

0100 0.08 0.16 0.16 0.04 0.04 0.20

09/25/97

2400 0.08 0.12 0.20 0.20 0.12 0.24

2300 0.04 0.04 0.08 0.12 0.00 0.12

2200 0.00 0.28 0.20 0.00 0.12 0.39

2100 0.31 0.12 0.12 0.59 0.39 0.20

2000 0.08 0.04 0.08 0.28 0.16 0.04

1900 0.04 0.08 0.08 0.04 0.04 0.12

1800 0.12 0.28 0.31 0.24 0.24 0.16

1700 0.20 0.24 0.16 0.16 0.04 0.16

1600 0.08 0.24 0.12 0.08 0.04 0.08

1500 0.00 0.00 0.04 0.00 0.04 0.04

1400 0.00 0.00 0.00 0.00 0.00 0.04

1300 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 3.70 2.95 3.62 3.03 5.39 4.57

 

FCD of Maricopa County ALERT System

Precip 9 : McMicken

 

DeviceID 5400 5405 5410 5415 5430 5435 5445 5450

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.04 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0900 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0800 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0700 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0600 0.00 0.00 0.00 0.00 0.08 0.00 0.00 0.00

0500 0.00 0.00 0.00 0.04 0.08 0.00 0.00 0.00

0400 0.00 0.00 0.00 0.00 0.04 0.00 0.00 0.00

0300 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0200 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

09/25/97

2400 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2300 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2200 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.08

2000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1900 0.00 0.00 0.00 0.00 0.04 0.00 0.00 0.00

1800 0.00 0.00 0.00 0.00 0.00 0.28 0.20 0.00

1700 0.00 0.00 0.00 0.16 0.24 0.24 0.28 0.12

1600 0.00 0.00 0.04 0.00 0.08 0.04 0.04 0.08

1500 0.00 0.00 0.00 0.00 0.04 0.00 0.00 0.12

1400 0.00 0.00 0.00 0.00 0.08 0.00 0.00 0.04

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.00 0.04 0.04 0.20 0.67 0.55 0.51 0.43

 

FCD of Maricopa County ALERT System

Precip 10: Circle City

 

DeviceID 5455 5460 5465 5475 5490

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.04 0.00

1000 0.00 0.00 0.00 0.00 0.00

0900 0.00 0.00 0.00 0.08 0.00

0800 0.00 0.00 0.00 0.00 0.20

0700 0.00 0.00 0.00 0.00 0.00

0600 0.00 0.00 0.00 0.00 0.00

0500 0.00 0.04 0.00 0.00 0.00

0400 0.00 0.00 0.00 0.00 0.12

0300 0.00 0.00 0.00 0.00 0.00

0200 0.00 0.00 0.00 0.00 0.00

0100 0.00 0.00 0.00 0.00 0.00

09/25/97

2400 0.00 0.00 0.00 0.00 0.04

2300 0.00 0.00 0.00 0.00 0.12

2200 0.00 0.00 0.00 0.00 0.00

2100 0.08 0.00 0.00 0.04 0.04

2000 0.00 0.00 0.00 0.04 0.00

1900 0.00 0.00 0.00 0.00 0.00

1800 0.00 0.04 0.08 0.00 0.04

1700 0.20 0.20 0.31 0.24 0.28

1600 0.12 0.12 0.12 0.08 0.12

1500 0.08 0.00 0.00 0.08 0.00

1400 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.47 0.39 0.51 0.59 0.94

 

FCD of Maricopa County ALERT System

Precip 11: Lower New R./Skunk Cr.

 

DeviceID 5500 5505 5510 5515 5520 5525 5535 5550

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0900 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0800 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0700 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0600 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0500 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0400 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0300 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0200 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

09/25/97

2400 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2300 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2200 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1900 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1800 0.00 0.00 0.08 0.08 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.08 0.00 0.00 0.00 0.04

1600 0.04 0.04 0.04 0.04 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.04 0.04 0.12 0.20 0.00 0.00 0.00 0.04

 

FCD of Maricopa County ALERT System

Precip 12: Upper New R./Skunk Cr.

 

DeviceID 5565 5580 5595 5610 5625 5630 5640

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00 0.00 0.04

0900 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0800 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0700 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0600 0.00 0.00 0.00 0.00 0.00 0.00 0.08

0500 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0400 0.00 0.00 0.00 0.00 0.00 0.00 0.04

0300 0.00 0.00 0.00 0.00 0.00 0.00 0.04

0200 0.00 0.00 0.00 0.00 0.00 0.00 0.04

0100 0.00 0.00 0.00 0.00 0.00 0.00 0.04

09/25/97

2400 0.00 0.00 0.00 0.00 0.00 0.00 0.20

2300 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2100 0.00 0.00 0.00 0.00 0.00 0.08 0.00

2000 0.00 0.04 0.00 0.00 0.00 0.00 0.00

1900 0.00 0.00 0.00 0.00 0.00 0.00 0.04

1800 0.00 0.00 0.00 0.00 0.04 0.00 0.12

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.12

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.00 0.04 0.00 0.00 0.04 0.08 0.75

 

FCD of Maricopa County ALERT System

Precip 13: Lake Pleasant

 

 

DeviceID 5650 5670 5685 5700 5715 5730

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.04 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.04 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.08 0.00

0900 0.00 0.00 0.04 0.00 0.00 0.12

0800 0.00 0.00 0.71 0.08 0.08 0.20

0700 0.00 0.00 0.00 0.35 0.12 0.04

0600 0.00 0.00 0.08 0.51 0.59 0.39

0500 0.00 0.00 0.16 0.28 0.35 0.00

0400 0.00 0.00 0.04 0.16 0.20 0.12

0300 0.00 0.00 0.00 0.16 0.20 0.04

0200 0.08 0.00 0.00 0.16 0.28 0.00

0100 0.00 0.00 0.04 0.28 0.24 0.16

09/25/97

2400 0.00 0.00 0.00 0.28 0.24 0.04

2300 0.00 0.04 0.00 0.24 0.16 0.08

2200 0.00 0.00 0.08 0.47 0.16 0.08

2100 0.00 0.08 0.04 0.08 0.24 0.00

2000 0.00 0.00 0.00 0.12 0.00 0.04

1900 0.00 0.00 0.04 0.24 0.04 0.24

1800 0.04 0.04 0.35 0.47 0.43 0.51

1700 0.16 0.00 0.20 0.28 0.24 0.04

1600 0.00 0.00 0.08 0.20 0.20 0.00

1500 0.00 0.00 0.00 0.00 0.04 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.28 0.16 1.85 4.37 3.90 2.09

 

FCD of Maricopa County ALERT System

Precip 14: Upper Agua Fria

 

DeviceID 5745 5760 5775 5790 5805 5820

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.04 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.04 0.04

1500 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.08 0.00

1300 0.00 0.00 0.04 0.04 0.04 0.00

1200 0.00 0.00 0.00 0.08 0.08 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.04

1000 0.00 0.00 0.04 0.00 0.04 0.12

0900 0.08 0.08 0.04 0.00 0.04 0.04

0800 0.08 0.00 0.04 0.12 0.08 0.04

0700 0.08 0.08 0.16 0.28 0.04 0.08

0600 0.00 0.04 0.28 0.20 0.16 0.12

0500 0.00 0.00 0.08 0.08 0.00 0.31

0400 0.00 0.00 0.00 0.00 0.04 0.24

0300 0.04 0.04 0.00 0.00 0.04 0.12

0200 0.00 0.00 0.00 0.00 0.08 0.00

0100 0.00 0.00 0.08 0.00 0.08 0.00

09/25/97

2400 0.00 0.08 0.28 0.00 0.08 0.00

2300 0.00 0.00 0.16 0.00 0.16 0.12

2200 0.00 0.00 0.00 0.00 0.00 0.08

2100 0.00 0.00 0.00 0.00 0.08 0.00

2000 0.00 0.00 0.12 0.20 0.12 0.04

1900 0.08 0.00 0.24 0.16 0.20 0.24

1800 0.12 0.04 0.31 0.04 0.24 0.12

1700 0.04 0.00 0.12 0.00 0.00 0.04

1600 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.51 0.35 1.97 1.18 1.73 1.77

 

FCD of Maricopa County ALERT System

Precip 15: Lower Verde River

 

DeviceID 5900 5915 5930 5945 5950 5960

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.08

1100 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00 0.00

0900 0.00 0.00 0.00 0.00 0.00 0.08

0800 0.00 0.00 0.04 0.00 0.00 0.04

0700 0.00 0.00 0.08 0.00 0.00 0.04

0600 0.00 0.00 0.00 0.00 0.00 0.04

0500 0.00 0.00 0.00 0.00 0.00 0.16

0400 0.04 0.00 0.00 0.00 0.00 0.08

0300 0.00 0.00 0.00 0.00 0.00 0.04

0200 0.00 0.04 0.00 0.04 0.04 0.00

0100 0.00 0.20 0.00 0.16 0.00 0.00

09/25/97

2400 0.00 0.04 0.08 0.24 0.00 0.08

2300 0.00 0.00 0.00 0.00 0.00 0.00

2200 0.00 0.00 0.00 0.00 0.00 0.00

2100 0.00 0.00 0.00 0.00 0.00 0.00

2000 0.00 0.00 0.00 0.00 0.00 0.00

1900 0.00 0.00 0.00 0.00 0.00 0.00

1800 0.00 0.00 0.04 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.04 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.04 0.28 0.24 0.47 0.04 0.63

 

FCD of Maricopa County ALERT System

Precip 16: Fountain Hills

 

DeviceID 5965 5970 5975 5980 5985 5990 5995

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.04

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0900 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0800 0.00 0.00 0.08 0.00 0.08 0.00 0.00

0700 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0600 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0500 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0400 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0300 0.00 0.04 0.00 0.00 0.00 0.00 0.00

0200 0.04 0.00 0.00 0.00 0.00 0.00 0.04

0100 0.00 0.00 0.20 0.04 0.24 0.04 0.16

09/25/97

2400 0.00 0.00 0.04 0.00 0.04 0.00 0.24

2300 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2000 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1900 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1800 0.00 0.00 0.04 0.00 0.04 0.00 0.04

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.04 0.04 0.35 0.04 0.39 0.04 0.51

 

FCD of Maricopa County ALERT System

Precip 26: Upper Cave Creek

 

DeviceID 4900 4915 4920 4930 4935 4940 4950

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0900 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0800 0.00 0.00 0.00 0.00 0.00 0.08 0.04

0700 0.00 0.00 0.00 0.00 0.04 0.00 0.00

0600 0.00 0.00 0.00 0.04 0.00 0.08 0.00

0500 0.00 0.00 0.00 0.00 0.00 0.04 0.04

0400 0.00 0.00 0.00 0.00 0.00 0.00 0.04

0300 0.00 0.00 0.00 0.00 0.00 0.00 0.04

0200 0.00 0.00 0.00 0.00 0.00 0.04 0.04

0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

09/25/97

2400 0.00 0.00 0.00 0.00 0.00 0.00 0.04

2300 0.00 0.00 0.00 0.00 0.00 0.08 0.00

2200 0.00 0.00 0.00 0.00 0.00 0.00 0.04

2100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2000 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1900 0.00 0.00 0.00 0.00 0.00 0.00 0.04

1800 0.00 0.04 0.00 0.04 0.00 0.00 0.08

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.00 0.04 0.00 0.08 0.04 0.31 0.39

 

FCD of Maricopa County ALERT System

Precip 31: Lower Waterman Wash

 

DeviceID 6810 6820 6840 6850 6860 6870 6880 6890

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0900 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0800 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0700 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0600 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0500 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0400 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0300 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0200 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

09/25/97

2400 0.00 0.04 0.00 0.00 0.00 0.00 0.00 0.00

2300 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2200 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1900 0.00 0.00 0.00 0.04 0.00 0.00 0.00 0.00

1800 0.00 0.00 0.04 0.00 0.00 0.00 0.04 0.00

1700 0.12 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.08 0.08 0.04 0.04 0.00 0.05 0.04 0.04

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.20 0.12 0.08 0.08 0.00 0.05 0.08 0.04

 

FCD of Maricopa County ALERT System

Precip 32: Upper Waterman Wash

 

DeviceID 6900 6905 6910 6920 6940 6960 6980

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0900 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0800 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0700 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0600 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0500 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0400 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0300 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0100 0.00 0.00 0.00 0.00 0.00 0.00 0.04

09/25/97

2400 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2300 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2100 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2000 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1900 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1800 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00 0.00 0.04

1500 0.00 0.16 0.12 0.08 0.12 0.20 0.00

1400 0.00 0.12 0.04 0.00 0.00 0.00 0.00

1300 0.00 0.08 0.00 0.00 0.04 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.04 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.00 0.39 0.16 0.08 0.16 0.20 0.08

 

FCD of Maricopa County ALERT System

Precip 33: Pinal County

 

DeviceID 750 775 780 785 795

 

Hourly Rainfall Values in Inches

09/26/97

1800 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.00 0.00 0.00 0.00

1600 0.00 0.00 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00

1000 0.00 0.00 0.00 0.00 0.00

0900 0.00 0.00 0.00 0.00 0.00

0800 0.00 0.00 0.00 0.00 0.00

0700 0.00 0.00 0.00 0.00 0.00

0600 0.00 0.00 0.00 0.00 0.00

0500 0.00 0.00 0.00 0.00 0.00

0400 0.00 0.00 0.00 0.00 0.00

0300 0.00 0.00 0.00 0.00 0.00

0200 0.00 0.00 0.00 0.00 0.00

0100 0.00 0.00 0.00 0.00 0.00

09/25/97

2400 0.00 0.00 0.00 0.00 0.00

2300 0.00 0.16 0.00 0.00 0.00

2200 0.00 0.00 0.00 0.00 0.00

2100 0.00 0.00 0.00 0.00 0.00

2000 0.00 0.00 0.00 0.00 0.00

1900 0.00 0.00 0.00 0.00 0.00

1800 0.00 0.00 0.00 0.00 0.00

1700 0.00 0.04 0.00 0.00 0.12

1600 0.00 0.12 0.00 0.00 0.00

1500 0.00 0.00 0.00 0.00 0.00

1400 0.00 0.00 0.00 0.00 0.00

1300 0.00 0.00 0.00 0.00 0.00

1200 0.00 0.00 0.00 0.00 0.00

1100 0.00 0.00 0.00 0.00 0.00

 

TOTALS: 0.00 0.31 0.00 0.00 0.12

 

 

 

Appendix D: Selected Digital Photos

 

Narrows Dam, Approximately 7 Hours Prior to Failure

 

 Narrows Dam, Approximately 14 Hours After Failure

 

 North End of Narrows Dam, 9/27/97 at 12:17 hrs

 

Centennial Wash at Aguila, AZ 9/26/97 at 15:30 hrs

 

APPENDIX E - Rainfall Data Recorded at

Harquahala Mountain

 

 

Data Display for 5185 Harquahala Mtn. 15-minute Rainfall Totals

Precipitation Gage StatType rain

DataType precip

Date Time inches Raw Units in

09/26/1997-06:19:38 18.46 469 09/26/97

09/26/1997-05:48:29 18.46 469 0700 0.00

09/26/1997-05:08:03 18.43 468 0645 0.00

09/26/1997-04:33:03 18.39 467 0630 0.00

09/26/1997-04:25:43 18.35 466 0615 0.00

09/26/1997-04:23:28 18.31 465 0600 0.04

09/26/1997-04:15:42 18.27 464 0545 0.00

09/26/1997-04:14:29 18.23 463 0530 0.00

09/26/1997-04:11:57 18.19 462 0515 0.04

09/26/1997-04:09:20 18.15 461 0500 0.00

09/26/1997-04:08:14 18.11 460 0445 0.04

09/26/1997-04:07:05 18.07 459 0430 0.12

09/26/1997-04:05:22 18.03 458 0415 0.28

09/26/1997-03:58:**********************

09/26/1997-03:52:56 17.91 455 0345 0.12

09/26/1997-03:48:54 17.87 454 0330 0.24

 

09/26/1997-03:39:22 17.76 451 0315 0.12

09/26/1997-03:37:57 17.72 450 0300 0.16

09/26/1997-03:33:48 17.68 449 0245 0.00

09/26/1997-03:27:45 17.64 448 0230 0.08

09/26/1997-03:24:39 17.60 447 0215 0.04

09/26/1997-03:22:04 17.56 446 0200 0.08

09/26/1997-03:20:14 17.52 445 0145 0.00

09/26/1997-03:15:01 17.44 443 0130 0.16

09/26/1997-03:09:05 17.40 442 0115 0.00

09/26/1997-03:05:10 17.36 441 0100 0.00

09/26/1997-03:01:54 17.32 440 0045 0.08

09/26/1997-02:59:58 17.28 439 0030 0.00

09/26/1997-02:56:**********************

09/26/1997-02:46:52 17.20 437

09/25/97

09/26/1997-02:23:54 17.13 435 2400 0.31

09/26/1997-02:11:49 17.05 433 2345 0.20

09/26/1997-01:54:**********************

09/26/1997-01:47:26 16.97 431 2315 0.12

 

09/26/1997-01:15:51 16.93 430 2300 0.24

09/26/1997-00:39:32 16.77 426 2245 0.55

09/26/1997-00:15:22 16.69 424 2230 0.35

09/25/1997-23:58:35 16.69 424 2215 0.16

09/25/1997-23:56:19 16.65 423 2200 0.12

09/25/1997-23:51:13 16.61 422 2145 0.08

09/25/1997-23:49:19 16.57 421 2130 0.16

09/25/1997-23:46:15 16.50 419 2115 0.31

09/25/1997-23:45:30 16.46 418 2100 0.16

09/25/1997-23:43:32 16.38 416 2045 0.20

09/25/1997-23:39:57 16.34 415 2030 0.16

09/25/1997-23:38:19 16.30 414 2015 0.12

09/25/1997-23:36:09 16.26 413 2000 0.28

09/25/1997-23:32:45 16.22 412 1945 0.16

09/25/1997-23:29:47 16.18 411 1930 0.31

09/25/1997-23:27:40 16.14 410 1915 0.12

09/25/1997-23:15:18 16.06 408 1900 0.28

09/25/1997-23:13:34 16.02 407 1845 0.39

09/25/1997-23:05:48 15.98 406 1830 0.39

 

09/25/1997-23:03:13 15.94 405 1815 0.35

09/25/1997-22:58:00 15.91 404 1800 0.43

09/25/1997-22:55:01 15.87 403 1745 0.20

09/25/1997-22:52:43 15.83 402 1730 0.55

09/25/1997-22:50:24 15.75 400 1715 0.43

09/25/1997-22:49:06 15.71 399 1700 0.20

09/25/1997-22:44:**********************

09/25/1997-22:39:56 15.63 397 1630 0.20

09/25/1997-22:39:04 15.59 396 1615 0.20

09/25/1997-22:38:28 15.55 395 1600 0.31

09/25/1997-22:36:52 15.47 393 1545 0.28

09/25/1997-22:34:39 15.39 391 1530 0.39

09/25/1997-22:33:41 15.35 390 1515 0.31

09/25/1997-22:33:06 15.31 389 1500 0.16

09/25/1997-22:31:28 15.24 387 1445 0.04

09/25/1997-22:30:50 15.20 386 1430 0.08

09/25/1997-22:30:04 15.16 385 1415 0.12

09/25/1997-22:26:15 15.12 384 1400 0.12

09/25/1997-22:24:15 15.08 383 1345 0.08

 

09/25/1997-22:22:28 15.04 382 1330 0.08

09/25/1997-22:19:21 14.96 380 1315 0.04

09/25/1997-22:18:03 14.92 379 1300 0.12

09/25/1997-22:16:45 14.88 378 1245 0.04

09/25/1997-22:15:21 14.84 377 1230 0.00

09/25/1997-22:05:59 14.76 375 1215 0.00

09/25/1997-22:03:54 14.72 374

09/25/1997-22:02:39 14.69 373 TOTAL: 11.97

09/25/1997-22:00:00 14.61 371

09/25/1997-21:56:03 14.57 370

09/25/1997-21:50:08 14.53 369

09/25/1997-21:42:45 14.49 368

09/25/1997-21:23:03 14.41 366

09/25/1997-21:19:57 14.37 365

09/25/1997-21:17:57 14.33 364

09/25/1997-21:16:05 14.29 363

09/25/1997-21:14:32 14.25 362

09/25/1997-21:12:02 14.21 361

09/25/1997-21:09:31 14.17 360

09/25/1997-21:08:22 14.13 359

09/25/1997-21:06:50 14.09 358

09/25/1997-21:04:58 14.06 357

09/25/1997-20:53:43 13.94 354

09/25/1997-20:51:31 13.90 353

09/25/1997-20:49:29 13.86 352

09/25/1997-20:46:05 13.82 351

09/25/1997-20:41:42 13.78 350

09/25/1997-20:38:22 13.74 349

09/25/1997-20:35:11 13.70 348

09/25/1997-20:33:31 13.66 347

09/25/1997-20:30:59 13.62 346

09/25/1997-20:28:22 13.58 345

09/25/1997-20:25:30 13.54 344

09/25/1997-20:05:50 13.43 341

09/25/1997-20:03:43 13.39 340

09/25/1997-20:01:20 13.35 339

09/25/1997-19:59:18 13.31 338

09/25/1997-19:58:01 13.27 337

09/25/1997-19:56:02 13.23 336

09/25/1997-19:53:43 13.19 335

09/25/1997-19:51:15 13.15 334

09/25/1997-19:49:45 13.11 333

09/25/1997-19:46:04 13.07 332

09/25/1997-19:42:11 13.03 331

09/25/1997-19:38:18 12.99 330

09/25/1997-19:34:47 12.95 329

09/25/1997-19:30:17 12.91 328

09/25/1997-19:27:27 12.87 327

09/25/1997-19:23:12 12.80 325

09/25/1997-19:20:27 12.76 324

09/25/1997-19:15:32 12.68 322

09/25/1997-19:06:04 12.56 319

09/25/1997-19:03:20 12.52 318

09/25/1997-19:00:43 12.48 317

09/25/1997-18:58:23 12.44 316

09/25/1997-18:56:34 12.40 315

09/25/1997-18:54:31 12.36 314

09/25/1997-18:50:47 12.28 312

09/25/1997-18:48:42 12.24 311

09/25/1997-18:46:49 12.20 310

09/25/1997-18:44:29 12.17 309

09/25/1997-18:41:13 12.09 307

09/25/1997-18:39:58 12.05 306

 

09/25/1997-18:38:44 12.01 305

09/25/1997-18:37:43 11.97 304

09/25/1997-18:36:35 11.93 303

09/25/1997-18:34:58 11.89 302

09/25/1997-18:33:08 11.85 301

09/25/1997-18:31:43 11.81 300

09/25/1997-18:29:53 11.77 299

09/25/1997-18:28:29 11.73 298

09/25/1997-18:25:07 11.65 296

09/25/1997-18:23:15 11.61 295

09/25/1997-18:21:37 11.57 294

09/25/1997-18:18:56 11.50 292

09/25/1997-18:17:18 11.46 291

09/25/1997-18:16:11 11.42 290

09/25/1997-18:14:48 11.38 289

09/25/1997-18:13:40 11.34 288

09/25/1997-18:12:29 11.30 287

09/25/1997-18:11:16 11.26 286

09/25/1997-18:09:47 11.22 285

 

09/25/1997-18:08:10 11.18 284

09/25/1997-18:06:07 11.14 283

09/25/1997-18:02:43 11.10 282

09/25/1997-17:59:27 11.02 280

09/25/1997-17:57:31 10.98 279

09/25/1997-17:56:18 10.94 278

09/25/1997-17:53:21 10.87 276

09/25/1997-17:50:51 10.79 274

09/25/1997-17:49:39 10.75 273

09/25/1997-17:48:29 10.71 272

09/25/1997-17:46:43 10.67 271

09/25/1997-17:40:21 10.59 269

09/25/1997-17:35:42 10.55 268

09/25/1997-17:33:52 10.51 267

09/25/1997-17:31:52 10.47 266

09/25/1997-17:30:42 10.43 265

09/25/1997-17:29:35 10.39 264

09/25/1997-17:28:17 10.35 263

09/25/1997-17:26:38 10.31 262

 

09/25/1997-17:24:17 10.28 261

09/25/1997-17:22:35 10.24 260

09/25/1997-17:21:22 10.20 259

09/25/1997-17:20:41 10.16 258

09/25/1997-17:20:03 10.12 257

09/25/1997-17:19:05 10.08 256

09/25/1997-17:18:22 10.04 255

09/25/1997-17:17:23 10.00 254

09/25/1997-17:16:37 9.96 253

09/25/1997-17:15:57 9.92 252

09/25/1997-17:15:08 9.88 251

09/25/1997-17:14:24 9.84 250

09/25/1997-17:12:34 9.76 248

09/25/1997-17:11:08 9.72 247

09/25/1997-17:09:48 9.69 246

09/25/1997-17:06:59 9.61 244

09/25/1997-17:05:52 9.57 243

09/25/1997-17:04:32 9.53 242

09/25/1997-17:03:20 9.49 241

 

09/25/1997-17:01:39 9.45 240

09/25/1997-16:58:01 9.41 239

09/25/1997-16:54:53 9.37 238

09/25/1997-16:52:47 9.33 237

09/25/1997-16:50:13 9.29 236

09/25/1997-16:47:35 9.25 235

09/25/1997-16:43:04 9.21 234

09/25/1997-16:41:01 9.17 233

09/25/1997-16:38:04 9.13 232

09/25/1997-16:29:42 9.06 230

09/25/1997-16:25:03 8.98 228

09/25/1997-16:21:53 8.94 227

09/25/1997-16:15:04 8.90 226

09/25/1997-16:11:25 8.86 225

09/25/1997-16:06:30 8.82 224

09/25/1997-16:02:40 8.78 223

09/25/1997-16:01:59 8.74 222

09/25/1997-16:00:52 8.70 221

09/25/1997-15:59:36 8.66 220

 

09/25/1997-15:58:26 8.62 219

09/25/1997-15:57:34 8.58 218

09/25/1997-15:56:27 8.54 217

09/25/1997-15:54:10 8.50 216

09/25/1997-15:50:17 8.46 215

09/25/1997-15:48:32 8.43 214

09/25/1997-15:46:29 8.39 213

09/25/1997-15:43:25 8.35 212

09/25/1997-15:41:17 8.31 211

09/25/1997-15:38:08 8.27 210

09/25/1997-15:35:46 8.23 209

09/25/1997-15:34:11 8.19 208

09/25/1997-15:32:51 8.15 207

09/25/1997-15:30:00 8.07 205

09/25/1997-15:28:55 8.03 204

09/25/1997-15:27:34 7.99 203

09/25/1997-15:26:09 7.95 202

09/25/1997-15:24:24 7.91 201

09/25/1997-15:22:50 7.87 200

 

09/25/1997-15:20:49 7.83 199

09/25/1997-15:19:17 7.80 198

09/25/1997-15:17:16 7.76 197

09/25/1997-15:12:02 7.68 195

09/25/1997-15:10:34 7.64 194

09/25/1997-15:08:31 7.60 193

09/25/1997-15:05:04 7.56 192

09/25/1997-15:03:40 7.52 191

09/25/1997-15:02:11 7.48 190

09/25/1997-14:55:21 7.36 187

09/25/1997-14:51:52 7.32 186

09/25/1997-14:47:17 7.28 185

09/25/1997-14:32:18 7.20 183

09/25/1997-14:22:08 7.17 182

09/25/1997-14:17:58 7.13 181

09/25/1997-14:12:15 7.09 180

09/25/1997-14:03:07 7.01 178

09/25/1997-13:57:19 6.97 177

09/25/1997-13:53:14 6.93 176

 

09/25/1997-13:48:34 6.89 175

09/25/1997-13:42:20 6.85 174

09/25/1997-13:31:51 6.81 173

09/25/1997-13:24:06 6.77 172

09/25/1997-13:16:30 6.73 171

09/25/1997-13:08:46 6.69 170

09/25/1997-12:58:05 6.65 169

09/25/1997-12:53:48 6.61 168

09/25/1997-12:45:33 6.57 167

09/25/1997-12:31:59 6.54 166

09/25/1997-12:06:57 6.50 165 Rainfall Begins

 

End of Report.