Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 20, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 16, 2012, 1:16 PM PDT for San Diego County, California. It was in force for 91 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 16, 2012, 1:16 PM PDT (20:16 UTC)
- Expired
- Aug 16, 2012, 2:47 PM PDT
- In force
- 91 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, 8.3 hours before the alert went out and 43 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
- 462 J/kg
- Mixed-layer CIN
- -535 J/kg
- Mixed-layer LCL
- 1513 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
433
WGUS56 KSGX 162016
FFWSGX
CAC073-162215-
/O.NEW.KSGX.FF.W.0020.120816T2016Z-120816T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
116 PM PDT THU AUG 16 2012
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA...
* UNTIL 315 PM PDT.
* AT 106 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A THUNDERSTORM CAPABLE OF PRODUCING FLASH FLOODING OVER DULZURA.
THE THUNDERSTORM WAS MOVING SOUTH SLOWLY.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO DULZURA.
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 3255 11690 3272 11687 3274 11668 3257 11666
3255 11677
$$
HARRISON1 follow-up statement
615
WGUS76 KSGX 162147
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
247 PM PDT THU AUG 16 2012
CAC073-162155-
/O.CAN.KSGX.FF.W.0020.000000T0000Z-120816T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
247 PM PDT THU AUG 16 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL SAN
DIEGO COUNTY...
THE THUNDERSTORM WITH VERY HEAVY RAINFALL HAS WEAKENED AND MOVED
SOUTHWEST OUT OF THE AREA...SO THE FLASH FLOOD WARNING HAS BEEN
CANCELLED.
LAT...LON 3255 11690 3272 11687 3274 11668 3257 11666
3255 11677
$$
SMALLThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 12:16 PM PDT | Flash Flood Warning | SGX | San Diego | 94 min |
| Aug 16, 12:36 PM PDT | Special Weather Statement | SGX | San Diego | 54 min |
| Aug 16, 12:43 PM PDT | Special Weather Statement | SGX | San Diego | 62 min |
| Aug 16, 12:45 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 30 min |
| Aug 16, 1:13 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 32 min |
| Aug 16, 1:41 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 49 min |
| Aug 16, 3:09 PM PDT | Severe Thunderstorm Warning | SGX | Riverside, San Bernardino | 34 min |
| Aug 16, 3:13 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 54 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.