Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 68, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Sep 4, 2012, 10:14 PM MST for Maricopa County, Arizona. It was in force for 72 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 4, 2012, 10:14 PM MST (05:14 UTC)
- Expired
- Sep 4, 2012, 11:26 PM MST
- In force
- 72 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 138 km from the middle of the area, began a volume at 05:13 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.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 5.2 hours before the alert went out and 125 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
- 386 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 2024 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- -20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
787 WGUS55 KPSR 050514 FFWPSR AZC013-050715- /O.NEW.KPSR.FF.W.0068.120905T0514Z-120905T0715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 1014 PM MST TUE SEP 4 2012 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... EXTREME SOUTHWESTERN MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA... * UNTIL 1215 AM MST * AT 1011 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED THUNDERSTORMS WITH VERY HEAVY RAIN CROSSING HIGHWAY 85 SOUTH OF GILA BEND. MOVEMENT WAS SOUTHEAST AT 15 MPH. * THE STORMS HAVE PRODUCED OVER 2 INCHES OF RAIN SINCE 900 PM...WITH AN ADDITIONAL 1 TO 2 INCHES POSSIBLE. RUNOFF FROM THIS HEAVY RAIN WILL AFFECT HIGHWAY 85 BETWEEN GILA BEND AND AJO. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. NEVER ATTEMPT TO CROSS FLOWING WATER OR WATER OF UNKNOWN DEPTH. TO REPORT FLOODING...PLEASE RELAY YOUR REPORT TO LOCAL LAW ENFORCEMENT WHEN YOU CAN DO SO SAFELY. && LAT...LON 3275 11310 3281 11275 3250 11269 3250 11307 $$ WOODALL
2 follow-up statements
298 WGUS75 KPSR 050550 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 1050 PM MST TUE SEP 4 2012 AZC013-050715- /O.CON.KPSR.FF.W.0068.000000T0000Z-120905T0715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MARICOPA AZ- 1050 PM MST TUE SEP 4 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM MST FOR EXTREME SOUTHWESTERN MARICOPA COUNTY... AT 1046 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED THUNDERSTORMS WITH VERY HEAVY RAIN ALONG AND WEST OF HIGHWAY 85 SOUTH OF GILA BEND. UP TO 3 INCHES OF RAIN HAS FALLEN ALONG AND WEST OF HIGHWAY 85 SINCE 945 PM. RUNOFF FROM THE HEAVY RAIN WILL AFFECT HIGHWAY 85 BETWEEN GILA BEND AND AJO...ESPECIALLY LOW LYING AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE EXTRA CAUTIOUS AT NIGHT WHEN FLOODING IS HARDER TO SEE. MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. TO REPORT FLOODING...PLEASE RELAY YOUR REPORT TO LOCAL LAW ENFORCEMENT WHEN YOU CAN DO SO SAFELY. && LAT...LON 3275 11310 3281 11275 3250 11269 3250 11307 $$ WOODALL
281 WGUS75 KPSR 050626 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 1126 PM MST TUE SEP 4 2012 AZC013-050635- /O.CAN.KPSR.FF.W.0068.000000T0000Z-120905T0715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MARICOPA AZ- 1126 PM MST TUE SEP 4 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EXTREME SOUTHWESTERN MARICOPA COUNTY... HEAVY RAIN HAS ENDED ACROSS SOUTHWEST MARICOPA COUNTY. RUNOFF FROM PREVIOUS STORMS WILL CONTINUE INTO THE EARLY MORNING HOURS HOWEVER FLASH FLOODING IS NO LONGER ANTICIPATED. CONTINUE TO USE CAUTION IF TRAVELING OVERNIGHT AND DO NOT ENTER ANY AREAS WHERE WATER IS FLOWING OVER THE ROADWAY. LAT...LON 3275 11310 3281 11275 3250 11269 3250 11307 $$ LEINS
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 5:25 PM MST | Special Weather Statement | PSR | Maricopa | 50 min |
| Sep 4, 6:01 PM MST | Areal Flood Advisory | PSR | Gila | 119 min |
| Sep 4, 6:42 PM MST | Special Weather Statement | PSR | Maricopa | 33 min |
| Sep 4, 7:06 PM MST | Areal Flood Advisory | PSR | Maricopa | 114 min |
| Sep 4, 7:06 PM MST | Areal Flood Advisory | PSR | La Paz, Maricopa | 114 min |
| Sep 4, 8:30 PM MST | Blowing Dust Advisory | PSR | 90 min | |
| Sep 4, 8:35 PM MST | Areal Flood Advisory | PSR | Maricopa, Yuma | 115 min |
| Sep 4, 8:45 PM MST | Areal Flood Advisory | PSR | Pinal | 2 hr |
| Sep 4, 9:09 PM MST | Flash Flood Warning | PSR | Maricopa | 2 hr |
| Sep 4, 9:42 PM MST | Areal Flood Advisory | PSR | Maricopa | 2 hr |
| Sep 5, 3:27 PM MST | Special Weather Statement | PSR | 33 min | |
| Sep 5, 4:23 PM MST | Special Weather Statement | PSR | 22 min | |
| Sep 5, 4:53 PM MST | Special Weather Statement | PSR | 37 min |
Nearby
Flash Flood Warnings in Arizona, 2012Every flash flood warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.