Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 8, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Jul 30, 2011, 1:39 PM PDT for San Bernardino County, California. It was in force for 96 min. 3 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
- Jul 30, 2011, 1:39 PM PDT (20:39 UTC)
- Expired
- Jul 30, 2011, 3:15 PM PDT
- In force
- 96 min
- 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 |
|---|---|---|---|
| Jul 30, 1:46 PM PDT | FLOOD | Victorville, CA | PARTS OF RIDGECREST ROAD FLOODED NEAR RAILROAD TRACKS. MANY STREETS IN SPRING VALLEY HAVE FAST FLOWING WATER. |
| Jul 30, 1:46 PM PDT | FLOOD | Victorville, CA | PARTS OF RIDGECREST ROAD FLOODED NEAR RAILROAD TRACKS. MANY STREETS IN SRPING VALLEY HAVE FLOWING WATER. |
| Jul 30, 2:30 PM PDT | FLOOD | Victorville, CA | STREET FLOODING IN VICTORVLLLE ON NISQUALLI BETWEEN BALSAM AND MARIPOSA. OUTSIDE LANE FLOODED FROM NISQUALLI AND COTTONWOOD. |
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, 8.7 hours before the alert went out and 197 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
- 657 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
674 WGUS56 KSGX 302039 FFWSGX CAC071-302215- /O.NEW.KSGX.FF.W.0008.110730T2039Z-110730T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 139 PM PDT SAT JUL 30 2011 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...VICTORVILLE...HESPERIA...APPLE VALLEY... * UNTIL 315 PM PDT * AT 130 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 GEORGE AFB AND ADELANTO...NEAR AND ALONG I-15. PRECAUTIONARY/PREPAREDNESS ACTIONS... ADDITIONAL RAINFALL AMOUNTS OF 1 INCH IS POSSIBLE IN THE WARNED AREA. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. && LAT...LON 3469 11745 3458 11707 3436 11718 3451 11760 $$ TARDY
1 follow-up statement
204 WGUS76 KSGX 302211 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 311 PM PDT SAT JUL 30 2011 CAC071-302220- /O.EXP.KSGX.FF.W.0008.000000T0000Z-110730T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 311 PM PDT SAT JUL 30 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 315 PM PDT FOR WEST CENTRAL SAN BERNARDINO COUNTY... THUNDERSTORMS HAVE MOVED NORTH OF THE APPLE VALLEY. EARLIER THERE WERE REPORTS OF STREET FLOODING AND POWERLINES DOWN DUE TO WIND. LAT...LON 3469 11745 3458 11707 3436 11718 3451 11760 $$ TARDY
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 2:53 AM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 17 hr |
| Jul 30, 12:33 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Jul 30, 12:58 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 32 min |
| Jul 30, 1:26 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 2 hr |
| Jul 30, 1:41 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 49 min |
| Jul 30, 2:13 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 32 min |
| Jul 30, 2:30 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Jul 30, 3:34 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 116 min |
| Jul 30, 3:46 PM PDT | Areal Flood Advisory | SGX | San Diego | 119 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.