Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 39, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Sep 9, 2012, 2:44 PM PDT for Orange County, Riverside County, California. It was in force for 3 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
- Sep 9, 2012, 2:44 PM PDT (21:44 UTC)
- Expired
- Sep 9, 2012, 5:14 PM PDT
- In force
- 3 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Orange County, CA, Riverside County, CA
The radar
The Santa Ana Mts radar (KSOX), 19 km from the middle of the area, began a volume at 21:47 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 |
|---|---|---|---|
| Sep 9, 3:00 PM PDT | FLOOD | Lake Elsinore, CA | 3 TO 5 INCHES OF WATER FLOWING ACROSS INTERSECTION OF HIGHWAY 74 AND LINCOLN. |
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, 9.7 hours before the alert went out and 105 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
- 145 J/kg
- Mixed-layer CIN
- -540 J/kg
- Mixed-layer LCL
- 1281 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
499 WGUS56 KSGX 092144 FFWSGX CAC059-065-100045- /O.NEW.KSGX.FF.W.0039.120909T2144Z-120910T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 244 PM PDT SUN SEP 9 2012 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... WEST CENTRAL RIVERSIDE COUNTY IN SOUTHERN CALIFORNIA... EAST CENTRAL ORANGE COUNTY IN SOUTHWEST CALIFORNIA... * UNTIL 545 PM PDT * AT 232 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 PERRIS AND LAKE ELSINORE PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. 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 3370 11769 3390 11730 3376 11715 3351 11753 $$ SMALL
2 follow-up statements
529 WGUS76 KSGX 092218 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 318 PM PDT SUN SEP 9 2012 CAC059-065-100045- /O.CON.KSGX.FF.W.0039.000000T0000Z-120910T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ RIVERSIDE CA-ORANGE CA- 318 PM PDT SUN SEP 9 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM PDT FOR EAST CENTRAL ORANGE AND WEST CENTRAL RIVERSIDE COUNTIES... AT 306 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE HEAVY RAIN PRODUCING FLASH FLOODING OVER THE WARNED AREA. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PERRIS AND LAKE ELSINORE. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. && LAT...LON 3370 11769 3390 11730 3376 11715 3351 11753 $$ SMALL
344 WGUS76 KSGX 100014 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 514 PM PDT SUN SEP 9 2012 CAC059-065-100017- /O.CAN.KSGX.FF.W.0039.000000T0000Z-120910T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ RIVERSIDE CA-ORANGE CA- 514 PM PDT SUN SEP 9 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL ORANGE AND WEST CENTRAL RIVERSIDE COUNTIES... THE THUNDERSTORM WITH HEAVY RAINFALL HAS DISSIPATED...SO THE FLASH FLOOD WARNING HAS BEEN CANCELLED. LAT...LON 3370 11769 3390 11730 3376 11715 3351 11753 $$ SMALL
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.