Alert archive / California / Flash Flood Warnings in 2008
Flash Flood Warning 39, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 4, 2008, 1:39 PM PDT for San Diego County, California. It was in force for 111 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
- Aug 4, 2008, 1:39 PM PDT (20:39 UTC)
- Expired
- Aug 4, 2008, 3:30 PM PDT
- In force
- 111 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County San Diego County, CA
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 8.7 hours before the alert went out and 71 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
- 2165 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS56 KSGX 042039 FFWSGX CAC073-042230- /O.NEW.KSGX.FF.W.0039.080804T2039Z-080804T2230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 139 PM PDT MON AUG 4 2008 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA... * UNTIL 330 PM PDT * AT 130 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM 6 MILES NORTH OF MOUNT LAGUNA... OR 21 MILES SOUTH OF BORREGO SPRINGS...MOVING NORTH AT 5 MPH. * FLASH FLOODING IS LIKELY IN SECTIONS OF MOUNT LAGUNA...AND ON SUNRISE HIGHWAY AND HIGHWAY S2. 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 3302 11655 3302 11633 3284 11633 3284 11655 $$ MOEDE
3 follow-up statements
000 WGUS76 KSGX 042111 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 211 PM PDT MON AUG 4 2008 CAC073-042230- /O.CON.KSGX.FF.W.0039.000000T0000Z-080804T2230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO CA- 211 PM PDT MON AUG 4 2008 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 PM PDT FOR CENTRAL SAN DIEGO COUNTY... AT 202 PM PDT...A THUNDERSTORM WITH TORRENTIAL RAIN WAS 2 MILES EAST OF MOUNT LAGUNA. THIS STORM WAS MOVING NORTH AT 5 MPH...AND WILL BRING FLASH FLOODING ALONG SUNRISE HIGHWAY AND THEN TO HIGHWAY S2 AS IT MOVES INTO EASTERN SLOPES OF THE MOUNTAINS INTO THE DESERTS. FLOODING IS ALSO POSSIBLE IN SHELTER VALLEY AND ALONG HIGHWAY 78. MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. WHEN ENCOUNTERING FLOODED ROADS...TURN AROUND...DONT DROWN. LAT...LON 3302 11655 3302 11633 3284 11633 3284 11655 $$ MOEDE
000 WGUS76 KSGX 042157 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 257 PM PDT MON AUG 4 2008 CAC073-042230- /O.CON.KSGX.FF.W.0039.000000T0000Z-080804T2230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO CA- 257 PM PDT MON AUG 4 2008 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 PM PDT FOR CENTRAL SAN DIEGO COUNTY... AT 242 PM PDT...NATIONAL WEATHER SERVICE RADAR SHOWED A LINE OF THUNDERSTORMS EXTENDING FROM MOUNT LAGUNA NORTHWARD TO BORREGO SPRINGS. THE STORMS HAVE DECREASED IN COVERAGE SINCE 230 PM...BUT HEAVY RAIN IS STILL POSSIBLE THROUGH 330 PM. LOW LYING SECTIONS OF HIGHWAY 78 AND HIGHWAY S3 SOUTH OF BORREGO SPRINGS WILL BE PARTICULARLY SUSCEPTIBLE TO FLASH FLOODING. IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. LAT...LON 3302 11655 3302 11633 3284 11633 3284 11655 $$ MOEDE
000 WGUS76 KSGX 042231 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 331 PM PDT MON AUG 4 2008 CAC073-042238- /O.EXP.KSGX.FF.W.0039.000000T0000Z-080804T2230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO CA- 331 PM PDT MON AUG 4 2008 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 330 PM PDT FOR CENTRAL SAN DIEGO COUNTY... THUNDERSTORMS HAVE WEAKENED...REDUCING THE THREAT FOR FLASH FLOODING. MORE DEVELOPMENT IS POSSIBLE THROUGH THE REST OF THE AFTERNOON. LAT...LON 3302 11655 3302 11633 3284 11633 3284 11655 $$ MOEDE
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 3:01 AM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 16 hr |
| Aug 4, 1:55 PM PDT | Flash Flood Warning | SGX | Riverside | 95 min |
| Aug 4, 2:53 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 52 min |
Nearby
Flash Flood Warnings in California, 2008Every flash flood warning in 2008
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.