Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 37, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 30, 2012, 3:10 PM PDT for San Bernardino County, California. It was in force for 2 hr. 2 reports 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 30, 2012, 3:10 PM PDT (22:10 UTC)
- Expired
- Aug 30, 2012, 5:15 PM PDT
- In force
- 2 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 30, 4:15 PM PDT | FLASH FLOOD | 8 N Victorville, CA | SWIFT WATER RESCUE ON NATIONAL TRAILS HWY AT LYNNHAVEN LANE. VAN WAS STRANDED IN 4 FEET OF MOVING WATER. |
| Aug 30, 4:15 PM PDT | FLASH FLOOD | 9 N Victorville, CA | BARBOSA ROAD WASHED OUT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Edwards AFB, CA (KEDW), launched 12:00Z, 10.2 hours before the alert went out and 57 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
- 2894 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -36 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
390 WGUS56 KSGX 302210 FFWSGX CAC071-310015- /O.NEW.KSGX.FF.W.0037.120830T2210Z-120831T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 310 PM PDT THU AUG 30 2012 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... WEST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... THIS INCLUDES THE CITIES OF...WRIGHTWOOD...VICTORVILLE... HESPERIA...APPLE VALLEY... * UNTIL 515 PM PDT * AT 306 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A STORM OVER THE WARNED AREA. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WRIGHTWOOD...PHELAN...VICTORVILLE...AND APPLE VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. 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 3476 11705 3447 11706 3423 11766 3480 11766 $$ SS
2 follow-up statements
076 WGUS76 KSGX 302257 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 357 PM PDT THU AUG 30 2012 CAC071-310015- /O.CON.KSGX.FF.W.0037.000000T0000Z-120831T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 357 PM PDT THU AUG 30 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM PDT FOR WEST CENTRAL SAN BERNARDINO COUNTY... AT 355 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE HEAVY RAIN PRODUCING FLASH FLOODING ALONG AND WEST OF INTERSTATE 15 IN THE AREAS NORTH OF VICTORVILLE AND NORTHWEST OF APPLE VALLEY. THIS WILL RESULT IN RAPID RISES OF WATER IN WASHES DRAINING INTO THE MOJAVE RIVER. THE NATIONAL TRAILS HIGHWAY WILL LIKELY HAVE FLOODING. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GEORGE AFB...VICTORVILLE...ADELANTO...ORO GRANDE AND HELENDALE. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. && LAT...LON 3476 11705 3447 11706 3423 11766 3480 11766 $$ MAXWELL
047 WGUS76 KSGX 310016 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 516 PM PDT THU AUG 30 2012 CAC071-310022- /O.EXP.KSGX.FF.W.0037.000000T0000Z-120831T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 516 PM PDT THU AUG 30 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 515 PM PDT FOR WEST CENTRAL SAN BERNARDINO COUNTY... RAINFALL OVER MOST OF THE WARNING THE AREA HAS WEAKENED SIGNIFICANTLY. HOWEVER...A WEAKENING THUNDERSTORM NEAR EL MIRAGE WILL CONTINUE TO PRODUCE MINOR RUNOFF NORTH OF HIGHWAY 18 AND WEST OF HIGHWAY 395. LAT...LON 3476 11705 3447 11706 3423 11766 3480 11766 $$ SS
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 8:47 PM PDT | High Surf Advisory | SGX | San Diego | 4 days |
| Aug 30, 3:18 AM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 16 hr |
| Aug 30, 11:57 AM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 2 hr |
| Aug 30, 12:04 PM PDT | Areal Flood Advisory | SGX | San Diego | 116 min |
| Aug 30, 12:11 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Aug 30, 12:11 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 34 min |
| Aug 30, 12:18 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 57 min |
| Aug 30, 12:45 PM PDT | Flash Flood Warning | SGX | Riverside | 3 hr |
| Aug 30, 12:50 PM PDT | Special Weather Statement | SGX | San Diego | 55 min |
| Aug 30, 1:05 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Aug 30, 1:30 PM PDT | Areal Flood Advisory | SGX | Riverside, San Bernardino, San Diego | 3 hr |
| Aug 30, 1:52 PM PDT | Severe Thunderstorm Warning | SGX | Riverside, San Bernardino | 53 min |
| Aug 30, 1:58 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Aug 30, 2:31 PM PDT | Flash Flood Warning | SGX | Riverside | 119 min |
| Aug 30, 2:38 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 40 min |
| Aug 30, 2:45 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 60 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.