Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 15, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 13, 2012, 12:19 PM PDT for San Diego County, California. 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 13, 2012, 12:19 PM PDT (19:19 UTC)
- Expired
- Aug 13, 2012, 2:35 PM PDT
- In force
- 2 hr
- 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), 61 km from the middle of the area, began a volume at 19:20 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, 7.3 hours before the alert went out and 73 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
- 446 J/kg
- Mixed-layer CIN
- -661 J/kg
- Mixed-layer LCL
- 1527 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
583 WGUS56 KSGX 131919 FFWSGX CAC073-132215- /O.NEW.KSGX.FF.W.0015.120813T1919Z-120813T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 1219 PM PDT MON AUG 13 2012 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHEASTERN SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA... * UNTIL 315 PM PDT * AT 1211 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A STORM OVER THE LOWER SAN DIEGO COUNTY MOUNTAINS. * THE STORM PRODUCING FLASH FLOODING IS OCCURRING NEAR THE LIVE OAK SPRINGS AND BOULEVARD AREAS...AND OTHER RURAL AREAS ALONG THE SOUTHERN SAN DIEGO COUNTY MOUNTAINS. 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. && LAT...LON 3285 11652 3287 11634 3265 11625 3263 11646 $$ HARRISON
2 follow-up statements
228 WGUS76 KSGX 132022 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 122 PM PDT MON AUG 13 2012 CAC073-132215- /O.CON.KSGX.FF.W.0015.000000T0000Z-120813T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO CA- 122 PM PDT MON AUG 13 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM PDT FOR SOUTHEASTERN SAN DIEGO COUNTY... AT 112 PM PDT...RADAR INDICATED THAT THUNDERSTORMS AND HEAVY SHOWERS HAVE DISSIPATED OVER THE WARNED AREA. HOWEVER...MORE STORMS MAY DEVELOP THROUGH 315 PM...AND RUN-OFF FROM HEAVY RAIN MAY CONTINUE...SO THE THE FLASH FLOOD WARNING REMAINS IN EFFECT. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. && LAT...LON 3285 11652 3287 11634 3265 11625 3263 11646 $$ HARRISON
984 WGUS76 KSGX 132135 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 235 PM PDT MON AUG 13 2012 CAC073-132145- /O.CAN.KSGX.FF.W.0015.000000T0000Z-120813T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO CA- 235 PM PDT MON AUG 13 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN SAN DIEGO COUNTY... THUNDERSTORMS AND SHOWERS HAVE DISSIPATED OVER THE WARNED AREA...AND SO THE FLASH FLOOD WARNING IS CANCELLED. LAT...LON 3285 11652 3287 11634 3265 11625 3263 11646 $$ HARRISON
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 5:29 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 46 min |
| Aug 12, 5:53 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Aug 12, 6:14 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 46 min |
| Aug 12, 7:23 PM PDT | Areal Flood Advisory | SGX | Riverside, San Diego | 112 min |
| Aug 13, 3:23 AM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 16 hr |
| Aug 13, 11:43 AM PDT | Special Weather Statement | SGX | 47 min | |
| Aug 13, 11:54 AM PDT | Areal Flood Advisory | SGX | San Bernardino | 65 min |
| Aug 13, 12:28 PM PDT | Special Weather Statement | SGX | San Diego | 62 min |
| Aug 13, 12:35 PM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
| Aug 13, 12:58 PM PDT | Areal Flood Advisory | SGX | Riverside, San Bernardino | 3 hr |
| Aug 13, 1:22 PM PDT | Special Weather Statement | SGX | San Diego | 53 min |
| Aug 13, 1:31 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 2 hr |
| Aug 13, 1:37 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Aug 13, 3:06 PM PDT | Areal Flood Advisory | SGX | Riverside, San Bernardino | 97 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.