Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 25, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 30, 2012, 3:12 PM PDT for Imperial County, California. It was in force for 3 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
- Jul 30, 2012, 3:12 PM PDT (22:12 UTC)
- Expired
- Jul 30, 2012, 6:15 PM PDT
- In force
- 3 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Imperial County, CA
The radar
The Yuma radar (KYUX), 79 km from the middle of the area, began a volume at 22:13 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
San Diego, CA (KNKX), launched 12:00Z, 10.2 hours before the alert went out and 193 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1583 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
136 WGUS55 KPSR 302212 FFWPSR CAC025-310115- /O.NEW.KPSR.FF.W.0025.120730T2212Z-120731T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 312 PM PDT MON JUL 30 2012 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL IMPERIAL COUNTY IN SOUTHEAST CALIFORNIA... * UNTIL 615 PM PDT * AT 308 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED THUNDERSTORMS WITH VERY HEAVY RAIN FROM EAST OF IMPERIAL...TO NORTHEAST OF GLAMIS. MOVEMENT WAS SLOWLY SOUTH. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HOLTVILLE PRECAUTIONARY/PREPAREDNESS ACTIONS... RADAR INDICATES THAT UP TO 2 INCHES OF RAIN HAS FALLEN IN THE AREA FROM EAST OF IMPERIAL TO SOUTHEAST OF GLAMIS. RUNOFF FROM THE HEAVY RAIN WILL CAUSE FLOODING IN THE AREA. MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. && LAT...LON 3328 11546 3338 11474 3273 11472 3268 11540 $$ WOODALL
3 follow-up statements
399 WGUS75 KPSR 302300 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 400 PM PDT MON JUL 30 2012 CAC025-310115- /O.CON.KPSR.FF.W.0025.000000T0000Z-120731T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ IMPERIAL CA- 400 PM PDT MON JUL 30 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM PDT FOR EASTERN IMPERIAL COUNTY... AT 356 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED THUNDERSTORMS WITH VERY HEAVY RAIN ALONG THE INTERSTATE 8 CORRIDOR FROM EAST OF IMPERIAL...TO NEAR ALGODONES DUNES. LIGHT TO MODERATE RAIN EXTENDED NORTH TO NEAR GLAMIS. MOVEMENT OF THE RAIN WAS SLOWLY SOUTH. RADAR INDICATES THAT OVER 2 INCHES OF RAIN HAS FALLEN ALONG THE INTERSTATE 8 CORRIDOR SOUTHEAST OF HOLTVILLE. THE HEAVY RAIN WILL CONTINUE THE THREAT OF RUNOFF AND FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT PEOPLE ALONG THE BANKS OF WASHES AND CREEKS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. NORMALLY DRY WASHES AND STREAMS WILL SUDDENLY HAVE RUNNING WATER AND MAKE UNBRIDGED CROSSINGS IMPASSABLE. STREETS...UNDERPASSES...AND LOW SPOTS WILL BECOME INUNDATED MAKING DRIVING HAZARDOUS IN THE WARNED AREA. MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. && LAT...LON 3314 11545 3338 11474 3273 11472 3268 11540 $$ WOODALL
339 WGUS75 KPSR 302343 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 443 PM PDT MON JUL 30 2012 CAC025-310115- /O.CON.KPSR.FF.W.0025.000000T0000Z-120731T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ IMPERIAL CA- 443 PM PDT MON JUL 30 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM PDT FOR CENTRAL IMPERIAL COUNTY... AT 439 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED LIGHT TO MODERATE RAIN FROM NEAR GLAMIS...TO SOUTH OF HOLTVILLE. MOVEMENT WAS SLOWLY SOUTH. ALTHOUGH THE HEAVY RAIN THAT PROMPTED THE WARNING HAD DIMINISHED...RUNOFF FROM THE EARLIER STORMS WILL CONTINUE THE THREAT OF FLOODING FROM HOLTVILLE TO THE SOUTH AND EAST...ESPECIALLY ALONG THE INTERSTATE 8 AND HIGHWAY 98 CORRIDORS. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HOLTVILLE. 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 3314 11545 3319 11473 3273 11472 3268 11540 $$ WOODALL
349 WGUS75 KPSR 310022 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 522 PM PDT MON JUL 30 2012 CAC025-310115- /O.CON.KPSR.FF.W.0025.000000T0000Z-120731T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ IMPERIAL CA- 522 PM PDT MON JUL 30 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM PDT FOR CENTRAL IMPERIAL COUNTY... AT 517 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED LIGHT TO MODERATE RAIN FROM NORTHWEST OF GLAMIS...TO SOUTHEAST OF HOLTVILLE. ALTHOUGH THE HEAVY RAIN THAT PROMPTED THE WARNING HAD DIMINISHED...RUNOFF FROM THE EARLIER STORMS WILL LIKELY PRODUCE FLOODING. ADDITIONALLY...VERY HEAVY RAIN TO THE WEST OF EL CENTRO AND BRAWLEY MAY ENTER THE WARNING AREA BY 600 PM. THIS COULD INCREASE THE FLASH FLOOD THREAT AGAIN. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WIEST AND GLAMIS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT PEOPLE ALONG THE BANKS OF WASHES AND CREEKS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. NORMALLY DRY WASHES AND STREAMS WILL SUDDENLY HAVE RUNNING WATER AND MAKE UNBRIDGED CROSSINGS IMPASSABLE. STREETS...UNDERPASSES...AND LOW SPOTS WILL BECOME INUNDATED MAKING DRIVING HAZARDOUS IN THE WARNED AREA. MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. && LAT...LON 3314 11545 3319 11473 3273 11472 3268 11540 $$ WOODALL
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 12:25 PM PDT | Flash Flood Watch | PSR | 9 hr | |
| Jul 30, 1:30 PM PDT | Areal Flood Advisory | PSR | Riverside | 2 hr |
| Jul 30, 2:23 PM PDT | Areal Flood Advisory | PSR | Riverside, San Bernardino | 52 min |
| Jul 30, 2:45 PM PDT | Special Weather Statement | PSR | Imperial | 45 min |
| Jul 30, 3:33 PM PDT | Areal Flood Advisory | PSR | Imperial, Riverside | 57 min |
| Jul 30, 4:15 PM PDT | Areal Flood Advisory | PSR | Imperial | 24 min |
| Jul 30, 4:38 PM PDT | Flash Flood Warning | PSR | Imperial | 3 hr |
| Jul 30, 4:50 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 40 min |
Nearby
Flash Flood Warnings in California, 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.