Alert archive / California / Flash Flood Warnings in 2009
Flash Flood Warning 2, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 23, 2009, 4:17 PM PDT for San Diego County, California. It was in force for 88 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 23, 2009, 4:17 PM PDT (23:17 UTC)
- Expired
- Aug 23, 2009, 5:45 PM PDT
- In force
- 88 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), 79 km from the middle of the area, began a volume at 23:18 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, 11.3 hours before the alert went out and 97 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
- 1667 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 89 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 232317 FFWSGX CAC073-240045- /O.NEW.KSGX.FF.W.0002.090823T2317Z-090824T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 417 PM PDT SUN AUG 23 2009 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA... * UNTIL 545 PM PDT * AT 408 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A STORM NEAR OCOTILLO WELLS...OR 15 MILES SOUTHEAST OF BORREGO SPRINGS...MOVING SLOWLY NORTHEAST AT 5 MPH. * THE STORM PRODUCING FLASH FLOODING WILL BE MAINLY OVER RURAL AREAS...BUT WILL AFFECT PORTIONS OF OCOTILLO WELLS. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 3316 11630 3316 11610 3298 11612 3298 11630 $$ SMALL
2 follow-up statements
000 WGUS76 KSGX 232334 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 434 PM PDT SUN AUG 23 2009 CAC073-240045- /O.CON.KSGX.FF.W.0002.000000T0000Z-090824T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO CA- 434 PM PDT SUN AUG 23 2009 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM PDT FOR EAST CENTRAL SAN DIEGO COUNTY... AT 427 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE HEAVY RAIN PRODUCING FLASH FLOODING. THIS STORM WAS LOCATED NEAR OCOTILLO WELLS...OR 12 MILES SOUTHWEST OF SALTON CITY...MOVING NORTHEAST AT 5 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CONTINUE TO CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE. LAT...LON 3316 11630 3316 11610 3298 11612 3298 11630 $$ SMALL
000 WGUS76 KSGX 240042 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 542 PM PDT SUN AUG 23 2009 CAC073-240048- /O.EXP.KSGX.FF.W.0002.000000T0000Z-090824T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO CA- 542 PM PDT SUN AUG 23 2009 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 545 PM PDT FOR EAST CENTRAL SAN DIEGO COUNTY... THE STRONG THUNDERSTORM THAT WAS OVER THE OCOTILLO WELLS AREA HAS MOVED EAST OUT OF SAN DIEGO COUNTY...SO THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 545 PM. THERE WILL STILL BE RESIDUAL FLOW IN THE AREA THIS EVENING...SO DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. LAT...LON 3316 11630 3316 11610 3298 11612 3298 11630 $$ SMALL
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 5:51 PM PDT | Areal Flood Advisory | SGX | San Diego | 99 min |
Nearby
Flash Flood Warnings in California, 2009Every flash flood warning in 2009
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.