Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 19, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 16, 2012, 12:16 PM PDT for San Diego County, California. It was in force for 94 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, 12:16 PM PDT (19:16 UTC)
- Expired
- Aug 16, 2012, 1:50 PM PDT
- In force
- 94 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, 7.3 hours before the alert went out and 46 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.
196
WGUS56 KSGX 161916
FFWSGX
CAC073-162215-
/O.NEW.KSGX.FF.W.0019.120816T1916Z-120816T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
1216 PM PDT THU AUG 16 2012
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA...
* UNTIL 315 PM PDT
* AT 1206 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A STORM OVER THE WARNED AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ALPINE AND
DESCANSO
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 3288 11685 3300 11675 3299 11662 3286 11655
3269 11656 3267 11669 3270 11682
$$
PALMER2 follow-up statements
432
WGUS76 KSGX 161948
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
1248 PM PDT THU AUG 16 2012
CAC073-162215-
/O.CON.KSGX.FF.W.0019.000000T0000Z-120816T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
1248 PM PDT THU AUG 16 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM PDT FOR
CENTRAL SAN DIEGO COUNTY...
AT 1237 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE HEAVY RAIN PRODUCING FLASH FLOODING OVER THE WARNED AREA.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ALPINE. THE
STORM WAS MOVING SOUTHWEST AT ABOUT 10 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 3288 11685 3300 11675 3299 11662 3286 11655
3269 11656 3267 11669 3270 11682
$$
SMALL212
WGUS76 KSGX 162050
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
150 PM PDT THU AUG 16 2012
CAC073-162056-
/O.CAN.KSGX.FF.W.0019.000000T0000Z-120816T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
150 PM PDT THU AUG 16 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL SAN DIEGO
COUNTY...
THE STRONG THUNDERSTORMS WITH HEAVY RAINFALL HAS MOVED TO THE
SOUTH...SO THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR THE ALPINE
AREA.
LAT...LON 3288 11685 3300 11675 3299 11662 3286 11655
3269 11656 3267 11669 3270 11682
$$
SMALLThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 1:16 PM PDT | Flash Flood Warning | SGX | San Diego | 91 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.