Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 9, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Jul 30, 2011, 2:30 PM PDT for San Bernardino 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
- Jul 30, 2011, 2:30 PM PDT (21:30 UTC)
- Expired
- Jul 30, 2011, 4:30 PM PDT
- In force
- 2 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 9.5 hours before the alert went out and 218 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.
164
WGUS56 KSGX 302130
FFWSGX
CAC071-302330-
/O.NEW.KSGX.FF.W.0009.110730T2130Z-110730T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
230 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...
* UNTIL 430 PM PDT
* AT 224 PM PDT...FLASH FLOODING WAS INDICATED FROM A STORM OVER THE
WARNED AREA. RADAR INDICATED 1 TO 2 INCHES OF RAIN OVER A LARGE
AREA...NEAR HELENDALE.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HELENDALE
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.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
&&
LAT...LON 3482 11759 3480 11725 3478 11711 3459 11709
3469 11745 3468 11761 3475 11766 3483 11766
$$
TARDY1 follow-up statement
941
WGUS76 KSGX 302334
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
434 PM PDT SAT JUL 30 2011
CAC071-302343-
/O.EXP.KSGX.FF.W.0009.000000T0000Z-110730T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
434 PM PDT SAT JUL 30 2011
...THE FLASH FLOOD WARNING HAS EXPIRED FOR WEST CENTRAL SAN
BERNARDINO COUNTY...
HEAVY RAIN HAS MOVED OUT OF THE WARNING AREA AND THE THREAT
FOR FLASH FLOODING HAS ENDED. ADDITIONAL ISOLATED THUNDERSTORMS
ARE STILL POSSIBLE LATE TODAY.
LAT...LON 3482 11759 3480 11725 3478 11711 3459 11709
3469 11745 3468 11761 3475 11766 3483 11766
$$
TARDYThe 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, 1:39 PM PDT | Flash Flood Warning | SGX | San Bernardino | 96 min |
| 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, 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; the sounding from the Mesonet's radiosonde archive.