Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 9, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 13, 2012, 6:08 PM PDT for Riverside County, California. It was in force for 112 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
- Jul 13, 2012, 6:08 PM PDT (01:08 UTC)
- Expired
- Jul 13, 2012, 8:00 PM PDT
- In force
- 112 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Riverside County, CA
The radar
The Yuma radar (KYUX), 155 km from the middle of the area, began a volume at 01:09 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 00:00Z, 1.1 hours before the alert went out and 255 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
- 1903 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
438 WGUS55 KPSR 140108 FFWPSR CAC065-140300- /O.NEW.KPSR.FF.W.0009.120714T0108Z-120714T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 608 PM PDT FRI JUL 13 2012 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL RIVERSIDE COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 800 PM PDT * AT 600 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED FLASH FLOODING FROM A THUNDERSTORM NEAR MIDLAND...OR 23 MILES SOUTHWEST OF VIDAL JUNCTION. RADAR ESTIMATED THAT MORE THAN 2 INCHES FELL IN ONE HOUR...JUST TO THE EAST OF MIDLAND. FLASH FLOODING IS POSSIBLE FROM THE AREA AROUND MIDLAND SOUTHEAST TOWARDS THE COMMUNITY OF BLYTHE...AND MAY AFFECT MOTORISTS ON AREA ROADS SUCH AS MIDLAND ROAD AND ARLINGTON MINE ROAD. * THE STORM PRODUCING 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. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. REMEMBER TURN AROUND DONT DROWN. && LAT...LON 3398 11487 3398 11466 3367 11467 3381 11485 $$ CB
2 follow-up statements
705 WGUS75 KPSR 140150 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 650 PM PDT FRI JUL 13 2012 CAC065-140300- /O.CON.KPSR.FF.W.0009.000000T0000Z-120714T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ RIVERSIDE CA- 650 PM PDT FRI JUL 13 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM PDT FOR EAST CENTRAL RIVERSIDE COUNTY... AT 642 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED AREA. RADAR CONTINUED TO DETECT LOCALLY HEAVY RAINFALL IN THE AREA AROUND THE COMMUNITY OF MIDLAND...A FEW BASINS JUST TO THE EAST OF MIDLAND PICKED UP OVER 2 INCHES OF RAIN SINCE 530 PM. FLASH FLOODING IS LIKELY NEAR MIDLAND...AND TO THE SOUTHEAST TOWARDS THE COMMUNITY OF BLYTHE. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 3398 11487 3398 11466 3367 11467 3381 11485 $$ CB
596 WGUS75 KPSR 140249 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 749 PM PDT FRI JUL 13 2012 CAC065-140300- /O.CON.KPSR.FF.W.0009.000000T0000Z-120714T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ RIVERSIDE CA- 749 PM PDT FRI JUL 13 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM PDT FOR EAST CENTRAL RIVERSIDE COUNTY... AT 742 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED SCATTERED SHOWERS AND THUNDERSTORMS IN A LINE FROM NORTHEAST RIVERSIDE COUNTY SOUTHWARD ALONG THE COLORADO RIVER TOWARDS YUMA. THUNDERSTORMS IN THE WARNING AREA WEAKENED CONSIDERABLY SINCE 7 PM AND RADAR INDICATED THAT RAINFALL ACCUMULATIONS WERE MOSTLY BELOW ONE HALF INCH SINCE 7 PM. EVEN THOUGH THERE HAVE BEEN NO REPORTS OF FLASH FLOODING...THERE WILL LIKELY BE SOME FLOODING OF AREA ROADS AND WASHES IN THE AREA FROM MIDLAND SOUTHEAST TOWARDS BLYTHE...AND THE WARNING WILL BE ALLOWED TO CONTINUE UNTIL 8 PM. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 3398 11487 3398 11466 3367 11467 3381 11485 $$ CB
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 5:30 PM PDT | Severe Thunderstorm Warning | PSR | Imperial, Riverside | 60 min |
| Jul 13, 5:45 PM PDT | Areal Flood Advisory | PSR | Riverside | 2 hr |
| Jul 13, 6:35 PM PDT | Areal Flood Advisory | PSR | Imperial | 115 min |
| Jul 13, 6:42 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 43 min |
| Jul 13, 6:54 PM PDT | Flash Flood Warning | PSR | Imperial | 111 min |
| Jul 13, 7:30 PM PDT | Areal Flood Advisory | PSR | Imperial, Riverside | 2 hr |
| Jul 13, 8:38 PM PDT | Flash Flood Warning | PSR | Imperial | 112 min |
| Jul 13, 10:05 PM PDT | Areal Flood Advisory | PSR | Imperial | 3 hr |
| Jul 13, 10:28 PM PDT | Areal Flood Advisory | PSR | Imperial | 3 hr |
| Jul 14, 4:35 PM PDT | Special Weather Statement | PSR | Imperial | 55 min |
| Jul 14, 4:44 PM PDT | Areal Flood Advisory | PSR | Riverside | 78 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.