Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 14, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 12, 2012, 5:53 PM PDT for San Diego County, California. It was in force for 3 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 12, 2012, 5:53 PM PDT (00:53 UTC)
- Expired
- Aug 12, 2012, 8:45 PM PDT
- In force
- 3 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), 74 km from the middle of the area, began a volume at 00:53 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 00:00Z, 0.9 hours before the alert went out and 91 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
- 142 J/kg
- Mixed-layer CIN
- -559 J/kg
- Mixed-layer LCL
- 2368 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
988
WGUS56 KSGX 130053
FFWSGX
CAC073-130345-
/O.NEW.KSGX.FF.W.0014.120813T0053Z-120813T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
553 PM PDT SUN AUG 12 2012
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA...
* UNTIL 845 PM PDT
* AT 542 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM OVER THE EASTERN SAN DIEGO
COUNTY DESERTS. THIS STORM IS CAPABLE OF PRODUCING FLASH FLOODING
OVER THE WARNED AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OCOTILLO
WELLS...SHELTER VALLEY...AGUA CALIENTE SPRINGS AND CANEBRAKE.
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 3294 11642 3301 11647 3316 11644 3318 11607
3308 11607 3307 11609 3284 11610
$$
JJT/JT3 follow-up statements
496
WGUS76 KSGX 130152
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
652 PM PDT SUN AUG 12 2012
CAC073-130345-
/O.CON.KSGX.FF.W.0014.000000T0000Z-120813T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
652 PM PDT SUN AUG 12 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM PDT FOR EAST
CENTRAL SAN DIEGO COUNTY...
AT 630 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA. RADAR
ESTIMATED STORM TOTAL PRECIPITATION AMOUNTS SO FAR RANGE FROM ONE
AND A HALF TO TWO INCHES IN THE LAST HOUR AND A HALF.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OCOTILLO
WELLS...AGUA CALIENTE SPRINGS...SOUTH OF CALIFORNIA HIGHWAY 78
BETWEEN ROUTE S2 AND THE IMPERIAL COUNTY BOARDER. WASHES AFFECTED
INCLUDE FISH CREEK WASH AND VALLECITO CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 3294 11642 3301 11647 3316 11644 3318 11607
3308 11607 3307 11609 3284 11610
$$
JT/JJT606
WGUS76 KSGX 130316
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
816 PM PDT SUN AUG 12 2012
CAC073-130345-
/O.CON.KSGX.FF.W.0014.000000T0000Z-120813T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
816 PM PDT SUN AUG 12 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM PDT FOR EAST
CENTRAL SAN DIEGO COUNTY...
AT 754 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THUNDERSTORMS HAVE DISSIPATED OVER THE WARNED AREA. RADAR
ESTIMATED STORM TOTAL PRECIPITATION AMOUNTS ARE AS HIGH AS TWO
INCHES IN SOME LOCATIONS OVER THE PAST THREE HOURS. ALTHOUGH
PRECIPITATION HAS CURRENTLY ENDED...WATER DRAINING FROM HIGHER TO
LOWER LOCATIONS IS STILL POSSIBLE OVER THE WARNED AREA THROUGH 845
PM PDT.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OCOTILLO
WELLS...AGUA CALIENTE SPRINGS...SOUTH OF CALIFORNIA HIGHWAY 78
BETWEEN ROUTE S2 AND THE IMPERIAL COUNTY BOARDER. WASHES AFFECTED
INCLUDE FISH CREEK WASH AND VALLECITO CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
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 3294 11642 3301 11647 3316 11644 3318 11607
3308 11607 3307 11609 3284 11610
$$
JJT626
WGUS76 KSGX 130339
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
839 PM PDT SUN AUG 12 2012
CAC073-130348-
/O.EXP.KSGX.FF.W.0014.000000T0000Z-120813T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
839 PM PDT SUN AUG 12 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 845 PM PDT FOR EAST CENTRAL
SAN DIEGO COUNTY...
FLOODING IS NO LONGER EXPECTED FOR THE WARNED AREA. THEREFORE...THE
FLASH FLOOD WARNING FOR EAST CENTRAL SAN DIEGO COUNTY WILL BE
ALLOWED TO EXPIRE AT 845 PM PDT.
LAT...LON 3294 11642 3301 11647 3316 11644 3318 11607
3308 11607 3307 11609 3284 11610
$$
JJTThe 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, 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, 12:19 PM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
| 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.