Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 38, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Sep 4, 2012, 3:59 PM PDT for San Diego County, California. It was in force for 81 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
- Sep 4, 2012, 3:59 PM PDT (22:59 UTC)
- Expired
- Sep 4, 2012, 5:20 PM PDT
- In force
- 81 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), 73 km from the middle of the area, began a volume at 22:59 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, 11.0 hours before the alert went out and 88 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
- 2730 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
594
WGUS56 KSGX 042259
FFWSGX
CAC073-050100-
/O.NEW.KSGX.FF.W.0038.120904T2259Z-120905T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
359 PM PDT TUE SEP 4 2012
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA...
* UNTIL 600 PM PDT
* AT 352 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS LIKELY PRODUCING FLASH FLOODING ALONG THE DESERT
SLOPES OF THE MOUNTAINS BETWEEN MOUNT LAGUNA AND AGUA CALIENTE
SPRINGS. HIGHWAY S-2 NEAR AGUA CALIENTE SPRINGS COULD RECEIVE
FLASH FLOODING FROM HEAVY RAINS AND RUNOFF FROM THE MOUNTAINS.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CANEBRAKE
AND AGUA CALIENTE SPRINGS
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
&&
LAT...LON 3307 11635 3304 11610 3262 11611 3261 11627
3284 11642
$$
MAXWELL2 follow-up statements
459
WGUS76 KSGX 042326
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
426 PM PDT TUE SEP 4 2012
CAC073-050100-
/O.CON.KSGX.FF.W.0038.000000T0000Z-120905T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
426 PM PDT TUE SEP 4 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM PDT FOR
SOUTHEASTERN SAN DIEGO COUNTY...
AT 419 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE HEAVY RAIN OVER THE WARNED AREA. HEAVY RUNOFF FROM THE
THUNDERSTORM PREVIOUSLY BETWEEN MOUNT LAGUNA AND AGUA CALIENTE
SPRINGS WILL CONTINUE THROUGH 500 PM AND COULD RESULT IN FLOODING
OVER HIGHWAY S-2 NEAR AGUA CALIENTE SPRINGS. OTHERWISE THUNDERSTORMS
WITH LOCALLY HEAVY RAIN WERE ABOUT 5 MILES NORTHEAST OF AGUA
CALIENTE ASPRINGS...NEAR JACUMBA AND JUST NORTHEAST OF LIVE OAK
SPRINGS.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CANEBRAKE AND
AGUA CALIENTE SPRINGS
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
&&
LAT...LON 3307 11635 3304 11610 3262 11611 3261 11627
3284 11642
$$
MAXWELL537
WGUS76 KSGX 050020
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
520 PM PDT TUE SEP 4 2012
CAC073-050029-
/O.CAN.KSGX.FF.W.0038.000000T0000Z-120905T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
520 PM PDT TUE SEP 4 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN SAN
DIEGO COUNTY...
STORMS HAVE MOVED EAST.
LAT...LON 3307 11635 3304 11610 3262 11611 3261 11627
3284 11642
$$
PGThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 2:40 PM PDT | Areal Flood Advisory | SGX | San Diego | 51 min |
| Sep 4, 4:06 PM PDT | Areal Flood Advisory | SGX | Riverside | 114 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.