Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 55, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 29, 2012, 4:28 PM MST for La Paz County, Arizona. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 29, 2012, 4:28 PM MST (23:28 UTC)
- Expired
- Aug 29, 2012, 6:30 PM MST
- In force
- 2 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County La Paz County, AZ
The radar
The Yuma radar (KYUX), 169 km from the middle of the area, began a volume at 23:30 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 12:00Z, 11.5 hours before the alert went out and 218 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
- 150 J/kg
- Mixed-layer CIN
- -335 J/kg
- Mixed-layer LCL
- 2256 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- -36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
261 WGUS55 KPSR 292328 FFWPSR AZC012-300130- /O.NEW.KPSR.FF.W.0055.120829T2328Z-120830T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 428 PM MST WED AUG 29 2012 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL LA PAZ COUNTY IN WEST CENTRAL ARIZONA... * UNTIL 630 PM MST * AT 421 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED VERY HEAVY RAIN THAT WILL CAUSE FLASH FLOODING. RADAR INDICATED THAT OVER TWO INCHES OF RAIN FELL SINCE 330 PM IN THE AREA WEST OF BOUSE...NEAR THE INTERSECTION OF HIGHWAYS 95 AND 72. THE AREA OF GREATEST CONCERN IS HIGHWAY 95 NORTH OF INTERSTATE 10 AND WEST OF BOUSE. * THE STORM PRODUCING VERY HEAVY RAIN THAT WILL CAUSE FLASH FLOODING WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT PEOPLE ALONG THE BANKS OF WASHES AND CREEKS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. NORMALLY DRY WASHES AND STREAMS WILL SUDDENLY HAVE RUNNING WATER AND MAKE UNBRIDGED CROSSINGS IMPASSABLE. STREETS...UNDERPASSES...AND LOW SPOTS WILL BECOME INUNDATED MAKING DRIVING HAZARDOUS IN THE WARNED AREA. MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. && LAT...LON 3408 11433 3407 11406 3381 11408 3381 11437 $$ CB
2 follow-up statements
113 WGUS75 KPSR 300002 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 502 PM MST WED AUG 29 2012 AZC012-300130- /O.CON.KPSR.FF.W.0055.000000T0000Z-120830T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LA PAZ AZ- 502 PM MST WED AUG 29 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MST FOR CENTRAL LA PAZ COUNTY... AT 454 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED SCATTERED THUNDERSTORMS BETWEEN BOUSE AND POSTON...PRODUCING LOCALLY HEAVY RAIN THAT WILL LIKELY CAUSE FLASH FLOODING. THE STORMS HAVE BEEN DISSIPATING SINCE 430 PM BUT RAINFALL RATES IN THE AREA STILL WERE IN EXCESS OF ONE INCH PER HOUR. THE HEAVIEST RAIN HAS FALLEN JUST TO THE EAST OF HIGHWAY 95...NEAR THE INTERSECTION OF HIGHWAY 72 TO THE WEST OF BOUSE. MOTORISTS ON HIGHWAY 95 NORTH OF INTERSTATE 10 SHOULD BE ALERT FOR WATER OVER THE ROAD AND SHOULD DRIVE WITH EXTREME CAUTION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT PEOPLE ALONG THE BANKS OF WASHES AND CREEKS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. NORMALLY DRY WASHES AND STREAMS WILL SUDDENLY HAVE RUNNING WATER AND MAKE UNBRIDGED CROSSINGS IMPASSABLE. STREETS...UNDERPASSES...AND LOW SPOTS WILL BECOME INUNDATED MAKING DRIVING HAZARDOUS IN THE WARNED AREA. MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. TO REPORT FLOODING...PLEASE RELAY YOUR REPORT TO LOCAL LAW ENFORCEMENT WHEN YOU CAN DO SO SAFELY. && LAT...LON 3408 11433 3407 11406 3381 11408 3381 11437 $$ CB
810 WGUS75 KPSR 300121 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 621 PM MST WED AUG 29 2012 AZC012-300130- /O.CON.KPSR.FF.W.0055.000000T0000Z-120830T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LA PAZ AZ- 621 PM MST WED AUG 29 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MST FOR CENTRAL LA PAZ COUNTY... AT 613 PM MST... STORMS IN THE FLASH FLOOD WARNING AREA...WHICH IS PRIMARILY THE AREA NEAR THE INTERSECTION OF HIGHWAY 95 AND HIGHWAY 72...HAVE DISSIPATED. LITTLE RAIN HAS FALLEN IN THE WARNING AREA SINCE 6 PM. THE WARNING WILL BE ALLOWED TO EXPIRE AT 630 PM. NO REPORTS OF FLOODING HAVE BEEN RECEIVED AT THIS TIME. THERE MAY STILL BE WATER OVER AREA ROADS ACROSS WEST CENTRAL LA PAZ COUNTY...ESPECIALLY HIGHWAY 95 NORTH OF INTERSTATE 10. MOTORISTS THIS EVENING SHOULD BE ALERT FOR WATER OVER ROADS AND SHOULD DRIVE WITH CAUTION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT PEOPLE ALONG THE BANKS OF WASHES AND CREEKS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. NORMALLY DRY WASHES AND STREAMS WILL SUDDENLY HAVE RUNNING WATER AND MAKE UNBRIDGED CROSSINGS IMPASSABLE. STREETS...UNDERPASSES...AND LOW SPOTS WILL BECOME INUNDATED MAKING DRIVING HAZARDOUS IN THE WARNED AREA. 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 3408 11433 3407 11406 3381 11408 3381 11437 $$ CB
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 3:13 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 62 min |
| Aug 29, 3:42 PM MST | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Aug 29, 3:42 PM MST | Special Weather Statement | PSR | La Paz | 48 min |
| Aug 29, 4:00 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 55 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.