Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 30, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 22, 2012, 3:36 PM PDT for San Diego County, California. It was in force for 2 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 22, 2012, 3:36 PM PDT (22:36 UTC)
- Expired
- Aug 22, 2012, 5:41 PM PDT
- In force
- 2 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), 78 km from the middle of the area, began a volume at 22:38 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, 10.6 hours before the alert went out and 95 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
- 596 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
098
WGUS56 KSGX 222236
FFWSGX
CAC073-230130-
/O.NEW.KSGX.FF.W.0030.120822T2236Z-120823T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
336 PM PDT WED AUG 22 2012
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA...
* UNTIL 630 PM PDT.
* AT 335 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
PERSISTENT THUNDERSTORMS AND HEAVY SHOWERS OVER SHELTER
VALLEY...AGUA CALIENTE SPRINGS...AND CANEBRAKE WHICH WILL LIKELY
PRODUCE FLASH FLOODING.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OCOTILLO
WELLS...SAN FELIPE CREEK...VALLECITO WASH...FISH CREEK...HARPER
CANYON WASH...AND HIGHWAY 78.
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.
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 11638 3304 11648 3320 11618 3320 11607
3308 11607 3307 11609 3287 11610
$$
HARRISON2 follow-up statements
005
WGUS76 KSGX 222338
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
438 PM PDT WED AUG 22 2012
CAC073-230130-
/O.CON.KSGX.FF.W.0030.000000T0000Z-120823T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
438 PM PDT WED AUG 22 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM PDT FOR EAST
CENTRAL SAN DIEGO COUNTY...
AT 424 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THUNDERSTORMS AND SHOWERS HAVE DIMINISHED SOMEWHAT IN AND
AROUND SHELTER VALLEY...AGUA CALIENTE SPRINGS...CANEBRAKE AND
COUNTY HIGHWAY 2. HOWEVER...THERE IS STILL A HEAVY SHOWER SOUTH OF
OCOTILLO WELLS AND COUNTY HIGHWAY 78...AND RUN-OFF FROM EARLIER
HEAVY DOWNPOURS WILL CONTINUE OVER OTHER AREAS...INCLUDING SAN
FELIPE CREEK...VALLECITO WASH...FISH CREEK AND HARPER CANYON WASH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO
STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS.
CAMPERS AND HIKERS SHOULD AVOID STREAMS OR CREEKS.
&&
LAT...LON 3288 11638 3304 11648 3320 11618 3320 11607
3308 11607 3307 11609 3287 11610
$$
HARRISON273
WGUS76 KSGX 230041
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
541 PM PDT WED AUG 22 2012
CAC073-230041-
/O.CAN.KSGX.FF.W.0030.000000T0000Z-120823T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
541 PM PDT WED AUG 22 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL SAN
DIEGO COUNTY...
HEAVY RAINFALL HAS MOVED OUT OF SAN DIEGO COUNTY DESERTS AND INTO
THE IMPERIAL VALLEY. THEREFORE...THE FLASH FLOOD WARNING WILL BE
ALLOWED TO EXPIRE. HOWEVER...SOME RUN-OFF FROM EARLIER DOWNPOURS
MAY STILL OCCUR ALONG WASHES AND CREEKS IN AND AROUND THE SHELTER
VALLEY...AGUA CALIENTE SPRINGS AND CANEBRAKE AREAS...IN ADDITION
TO HIGHWAYS 78 AND 2.
LAT...LON 3288 11638 3304 11648 3320 11618 3320 11607
3308 11607 3307 11609 3287 11610
$$
HARRISONThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 9:57 AM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 8 hr |
| Aug 22, 1:59 PM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
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.