Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 9, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Jul 31, 2012, 1:23 PM PDT for San Diego County, California. It was in force for 82 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 31, 2012, 1:23 PM PDT (20:23 UTC)
- Expired
- Jul 31, 2012, 2:45 PM PDT
- In force
- 82 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County San Diego County, CA
The radar
The San Diego radar (KNKX), 82 km from the middle of the area, began a volume at 20:26 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, 8.4 hours before the alert went out and 101 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
- 1285 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
115 WGUS56 KSGX 312023 FFWSGX CAC073-312145- /O.NEW.KSGX.FF.W.0009.120731T2023Z-120731T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 123 PM PDT TUE JUL 31 2012 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA...THIS INCLUDES THE CITIES OF BORREGO SPRINGS AND OCOTILLO WELLS... * UNTIL 245 PM PDT * AT 115 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED ONE HOUR RAINFALL AMOUNTS OF 1 TO 2 INCHES PER HOUR FROM A COUPLE OF STRONG CELLS TO THE NORTHEAST OF BORREGO SPRINGS. * THE STORMS ARE MOVING TOWARD THE SOUTH AND SOUTHEAST AT 10 TO 15 MPH...HOWEVER...NEW CELLS ARE DEVELOPING AND MOVING OVER THE SAME WARNED AREA. * THESE STORMS WILL ALSO LIKELY AFFECT PORTIONS OF HIGHWAY 78 INCLUDING THE CITY OF OCOTILLO WELLS. 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. 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 3313 11635 3342 11640 3342 11608 3312 11608 $$ TS
2 follow-up statements
460 WGUS76 KSGX 312102 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 202 PM PDT TUE JUL 31 2012 CAC073-312145- /O.CON.KSGX.FF.W.0009.000000T0000Z-120731T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO CA- 202 PM PDT TUE JUL 31 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 PM PDT FOR NORTHEASTERN SAN DIEGO COUNTY... AT 154 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM WITH HEAVY RAIN CAPABLE OF PRODUCING FLASH FLOODING OVER THE WARNED AREA. THIS STORM APPEARS TO BE MOVING SOUTH AND DIMINISHING...HOWEVER RUNOFF CAN STILL BE AN ISSUE. THIS THUNDERSTORM WITH EXCESSIVE RAIN WILL AFFECT PORTIONS OF THE ANZA BORREGO STATE PARK AND HIGHWAY 78 JUST WEST OF OCOTILLO WELLS...BUT OTHERWISE WILL REMAIN OVER MAINLY RURAL AREAS OF SAN DIEGO COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 3313 11635 3342 11640 3342 11608 3312 11608 $$ TS
480 WGUS76 KSGX 312140 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 240 PM PDT TUE JUL 31 2012 CAC073-312146- /O.EXP.KSGX.FF.W.0009.000000T0000Z-120731T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO CA- 240 PM PDT TUE JUL 31 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 245 PM PDT FOR NORTHEASTERN SAN DIEGO COUNTY... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES THE STORMS OVER THE WARNED AREA HAVE DISSIPATED. RUNOFF DUE TO RAINFALL FROM THESE STORMS WILL STILL BE POSSIBLE OVER THE NEXT HOUR SO CAUTION SHOULD STILL BE USED IN THIS AREA. LAT...LON 3313 11635 3342 11640 3342 11608 3312 11608 $$ TS
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 7:45 PM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 23 hr |
| Jul 31, 11:51 AM PDT | Flash Flood Warning | SGX | Riverside | 105 min |
| Jul 31, 2:26 PM PDT | Flash Flood Warning | SGX | Riverside | 109 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.