Alert archive / Arizona / Flash Flood Warnings in 2007
Flash Flood Warning 21, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 25, 2007, 3:40 PM MST for Maricopa County, Pinal County, Arizona. It was in force for 65 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 25, 2007, 3:40 PM MST (22:40 UTC)
- Expired
- Jul 25, 2007, 4:45 PM MST
- In force
- 65 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
Counties Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 29 km from the middle of the area, began a volume at 22:39 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 25, 3:45 PM MST | FLASH FLOOD | Phoenix, AZ | GLEANDALE AVE AND 23RD AVE FLOODED CURB TO CURB. VERY SEVERE STREET FLOODING |
| Jul 25, 4:10 PM MST | FLASH FLOOD | Mesa, AZ | 1.34 INCHES RAIN IN 30 MINUTES AT ELLIOT AND HAWES ROAD |
| Jul 25, 4:15 PM MST | FLASH FLOOD | Queen Creek, AZ | 1.10 INCHES RAIN IN 35 MINUTES AT QUEEN CREEK ROAD GAUGE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 12:00Z, 10.7 hours before the alert went out and 34 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 773 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 1353 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS55 KPSR 252241 FFWPSR AZC013-021-252345- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 340 PM MST WED JUL 25 2007 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA... THIS INCLUDES THE CITY OF GILBERT... NORTH CENTRAL PINAL COUNTY IN SOUTH CENTRAL ARIZONA... * UNTIL 445 PM MST * AT 335 PM MST...FLASH FLOODING WAS REPORTED FROM A THUNDERSTORM OVER THE WARNED AREA. THIS INCLUDES QUEEN CREEK...CHANDLER HEIGHTS...JOHNSON RANCH...GILBERT...MESA...AND CHANDLER. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HIGLEY. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. LAT...LON 3315 11181 3315 11149 3337 11154 3338 11181 $$ HV
1 follow-up statement
000 WGUS75 KPSR 252347 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 441 PM MST WED JUL 25 2007 AZC013-021-252351- MARICOPA AZ-PINAL AZ- 441 PM MST WED JUL 25 2007 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 445 PM MST FOR NORTH CENTRAL PINAL AND EAST CENTRAL MARICOPA COUNTIES... ...URBAN AND SMALL STREAM FLOOD ADVISORY CONTINUES FOR MARICOPA AND NORTH CENTRAL PINAL COUNTIES UNTIL 615 PM.... THE FLASH FLOOD WARNING ISSUED EARLIER FOR THE AREA AROUND QUEEN CREEK...CHANDLER HEIGHTS...GILBERT...AND MESA WAS ALLOWED TO EXPIRE AT 445 PM. HEAVY RAIN PRODUCING THUNDERSTORMS HAVE WEAKENED IN THE AREA...AND HAVE MOVED NORTH TOWARD FORT MCDOWELL. THE THREAT FOR ADDITIONAL FLOODING RAINS IN THE QUEEN CREEK AREA HAS ENDED...HOWEVER MANY NORMALLY DRY WASHES AND CITY STREETS WILL CONTINUE TO OVERFLOW THROUGH 6 PM. AN URBAN AND SMALL STREAM FLOOD ADVISORY FOR ALL OF MARICOPA AND NORTH CENTRAL PINAL COUNTIES IS STILL POSTED UNTIL 615 PM. THE ATMOSPHERE IS VERY MOIST AND UNSTABLE AND A CHANCE FOR SHOWERS AND THUNDERSTORMS WILL CONTINUE UNTIL LATE EVENING. LAT...LON 3315 11181 3315 11149 3337 11154 3338 11181 $$ HV
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 7:07 PM MST | Dust Storm Warning | PSR | 113 min | |
| Jul 25, 11:20 AM MST | Flash Flood Warning | PSR | Maricopa | 115 min |
| Jul 25, 12:02 PM MST | Flash Flood Watch | PSR | 7 hr | |
| Jul 25, 1:12 PM MST | Flash Flood Warning | PSR | Maricopa | 2 hr |
| Jul 25, 1:12 PM MST | Flash Flood Warning | PSR | Maricopa | 2 hr |
| Jul 25, 4:01 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 44 min |
Nearby
Flash Flood Warnings in Arizona, 2007Every flash flood warning in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.