Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 29, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 22, 2012, 1:59 PM PDT for San Diego County, California. It was in force for 2 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 22, 2012, 1:59 PM PDT (20:59 UTC)
- Expired
- Aug 22, 2012, 4:00 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), 80 km from the middle of the area, began a volume at 20:59 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 22, 2:59 PM PDT | FLASH FLOOD | 10 Nnw Ocotillo Wells, CA | CALIFORNIA HIGHWAY PATROL REPORTS ROADWAY FLOODING ALONG COUNTY HIGHWAY 22...OTHERWISE KNOWN AS BORREGO SALTON SEA WAY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 9.0 hours before the alert went out and 99 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.
110
WGUS56 KSGX 222059
FFWSGX
CAC073-222300-
/O.NEW.KSGX.FF.W.0029.120822T2059Z-120822T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
159 PM PDT WED AUG 22 2012
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA...
THIS INCLUDES THE CITY OF BORREGO SPRINGS...
* UNTIL 400 PM PDT
* AT 148 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A THUNDERSTORM CAPABLE OF PRODUCING FLASH FLOODING OVER THE WARNED
AREA.
* THE STORM CAPABLE OF PRODUCING FLASH FLOODING IS LOCATED OVER
BORREGO SPRINGS...AND COULD AFFECT OTHER RURAL AREAS WITHIN THE
WARNED BOX.
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 3318 11644 3327 11643 3335 11639 3333 11608
3324 11607 3315 11608
$$
JJT2 follow-up statements
988
WGUS76 KSGX 222135
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
235 PM PDT WED AUG 22 2012
CAC073-222300-
/O.CON.KSGX.FF.W.0029.000000T0000Z-120822T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
235 PM PDT WED AUG 22 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM PDT FOR
NORTHEASTERN SAN DIEGO COUNTY...
AT 235 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THUNDERSTORMS PRODUCING HEAVY RAIN ARE MOVING OVER THE
BORREGO BAD-LANDS...WHICH IS ABOUT 5 MILES NORTHEAST OF BORREGO
SPRINGS...AND STARTING TO MOVE OFF TO THE EAST. CONSIDERABLE RUN-OFF
IS LIKELY IN COYOTE CREEK...AND FLOWING WATERS MAY RUN OVER HIGHWAY
78 AND HIGHWAY 22. SAN FELIPE CREEK MAY BE IMPACTED AS HEAVY RAINS
START TO MOVE OVER THAT AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 3318 11644 3327 11643 3335 11639 3333 11608
3324 11607 3315 11608
$$
HARRISON711
WGUS76 KSGX 222257
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
357 PM PDT WED AUG 22 2012
CAC073-222304-
/O.EXP.KSGX.FF.W.0029.000000T0000Z-120822T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
357 PM PDT WED AUG 22 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 400 PM PDT FOR NORTHEASTERN
SAN DIEGO COUNTY...
HEAVY SHOWERS AND THUNDERSTORMS HAVE MOVED OUT OF THE AREA OVER
BORREGO SPRINGS...THE BORREGO BAD-LANDS...COYOTE CREEK AND COUNTY
HIGHWAY 22. THEREFORE...THE FLASH FLOOD WARNING WILL BE ALLOWED TO
EXPIRE. HOWEVER...EXPECT SOME RUN-OFF TO CONTINUE OVER THE NEXT
COUPLE HOURS.
LAT...LON 3318 11644 3327 11643 3335 11639 3333 11608
3324 11607 3315 11608
$$
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, 3:36 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.