Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 6, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Jul 7, 2011, 3:34 PM PDT for San Diego County, California. It was in force for 59 min. 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
- Jul 7, 2011, 3:34 PM PDT (22:34 UTC)
- Expired
- Jul 7, 2011, 4:33 PM PDT
- In force
- 59 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), 82 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 7, 4:02 PM PDT | HEAVY RAIN 0.8 | 2 W Ocotillo Wells, CA | 0.80 INCHES FELL AT ALERT STATION OCWC1 BETWEEN 230 PM AND 300 PM. 0.50 INCHES FELL BETWEEN 231 PM AND 241 PM. |
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, 10.6 hours before the alert went out and 100 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
- 1301 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -19 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.
173
WGUS56 KSGX 072234
FFWSGX
CAC073-080000-
/O.NEW.KSGX.FF.W.0006.110707T2234Z-110708T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
334 PM PDT THU JUL 7 2011
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA...
THIS INCLUDES THE CITY OF BORREGO SPRINGS...
* UNTIL 500 PM PDT
* AT 325 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
RAINFALL RATES OF OVER ONE INCH PER HOUR FROM NEARLY STATIONARY
THUNDERSTORMS ABOUT 5 MILES NORTHWEST OF OCOTILLO WELLS.
THUNDERSTORMS WITH HEAVY RAIN EXTENDED FROM NEAR BORREGO SPRINGS
SOUTHEAST TO OCOTILLO WELLS.
* FLASH FLOODING IS LIKELY BETWEEN 340 PM AND 500 PM ALONG HIGHWAY
78 ABOUT 5 MILES WEST OF OCOTILLO WELLS. FLASH FLOODING IS ALSO
POSSIBLE IN THE BORREGO SPRINGS AREA THROUGH 500 PM.
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 3329 11640 3330 11610 3307 11609 3306 11609
3305 11614 3303 11628
$$
MAXWELL2 follow-up statements
294
WGUS76 KSGX 072313
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
413 PM PDT THU JUL 7 2011
CAC073-080000-
/O.CON.KSGX.FF.W.0006.000000T0000Z-110708T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
413 PM PDT THU JUL 7 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM PDT FOR EAST
CENTRAL SAN DIEGO COUNTY...
AT 405 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THAT
THE THUNDERSTORM WEST AND NORTHWEST OF OCOTILLO WELLS HAD WEAKENED
CONSIDERABLY. THE THUNDERSTORMS NEAR BORREGO SPRINGS HAD ALSO
WEAKENED. BETWEEN 330 PM AND 400 PM...A RAIN GAUGE 2 MILES WEST OF
OCOTILLO WELLS REPORTED 0.80 INCHES OF RAIN.
THE FLASH FLOOD THREAT HAS ENDED FOR BORREGO SPRINGS.
HOWEVER...WATER COULD CONTINUE TO BE OVER ROADWAYS JUST WEST OF
OCOTILLO WELLS...INCLUDING ALONG HIGHWAY 78...UNTIL AROUND 430 PM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
&&
LAT...LON 3327 11624 3330 11610 3306 11609 3305 11614
3303 11625
$$
MAXWELL014
WGUS76 KSGX 072333
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
433 PM PDT THU JUL 7 2011
CAC073-072342-
/O.CAN.KSGX.FF.W.0006.000000T0000Z-110708T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
433 PM PDT THU JUL 7 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL SAN
DIEGO COUNTY...
THE HEAVY RAIN ENDED SHORTLY AFTER 400 PM...AND NO NEW FLASH
FLOODING IS EXPECTED IN THE DESERTS OF SAN DIEGO COUNTY THIS
AFTERNOON.
LAT...LON 3327 11624 3330 11610 3306 11609 3305 11614
3303 11625
$$
MAXWELLThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 5:06 PM PDT | Areal Flood Advisory | SGX | Riverside, San Bernardino | 110 min |
| Jul 6, 6:43 PM PDT | Special Weather Statement | SGX | 77 min | |
| Jul 7, 9:33 AM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 9 hr |
| Jul 7, 3:12 PM PDT | Areal Flood Advisory | SGX | San Diego | 82 min |
Nearby
Flash Flood Warnings in California, 2011Every flash flood warning in 2011
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.