Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 36, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 30, 2012, 2:31 PM PDT for Riverside County, California. It was in force for 119 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
- Aug 30, 2012, 2:31 PM PDT (21:31 UTC)
- Expired
- Aug 30, 2012, 4:30 PM PDT
- In force
- 119 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Riverside County, CA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 30, 3:27 PM PDT | FLOOD | Moreno Valley, CA | EASTBOUND HIGHWAY 60 AT REDLANDS BLVD CLOSED DUE TO FLOODING. |
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, 9.5 hours before the alert went out and 121 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
- 2209 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
072 WGUS56 KSGX 302131 FFWSGX CAC065-302330- /O.NEW.KSGX.FF.W.0036.120830T2131Z-120830T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 231 PM PDT THU AUG 30 2012 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... WEST CENTRAL RIVERSIDE COUNTY IN SOUTHERN CALIFORNIA... THIS INCLUDES THE CITY OF MORENO VALLEY... * UNTIL 430 PM PDT * AT 224 PM PDT...A THUNDERSTORM WITH VERY HEAVY RAIN CONTINUED NEAR MORENO VALLEY. OTHER THUNDERSTORMS WITH HEAVY RAIN ARE DEVELOPING NEAR MORENO VALLEY AND WEST OF PERRIS...WHICH WILL LIKELY PRODUCE FLOODING AFTER 300 PM. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MORENO VALLEY...MARCH AIR FORCE BASE...LAKEVIEW AND PERRIS. 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 3400 11734 3400 11702 3375 11695 3367 11741 $$ MAXWELL
2 follow-up statements
447 WGUS76 KSGX 302222 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 322 PM PDT THU AUG 30 2012 CAC065-302330- /O.CON.KSGX.FF.W.0036.000000T0000Z-120830T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ RIVERSIDE CA- 322 PM PDT THU AUG 30 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM PDT FOR WEST CENTRAL RIVERSIDE COUNTY... AT 312 PM PDT...HEAVY RAIN CONTINUED FROM THE EAST SIDE OF RIVERSIDE TO MORENO VALLEY AND SOUTH TO PERRIS AND SUN CITY. FLASH FLOODING WAS REPORTED IN SAN TIMOTEO CANYON BETWEEN REDLANDS AND MORENO VALLEY WITH CARS STUCK IN FLOOD WATERS ALONG SAN TIMOTEO CANYON ROAD. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MORENO VALLEY...MARCH FIELD...NUEVO...LAKEVIEW...PERRIS AND SUN CITY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES... DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM... EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND. && LAT...LON 3400 11734 3400 11702 3375 11695 3367 11741 $$ MAXWELL
526 WGUS76 KSGX 302329 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 429 PM PDT THU AUG 30 2012 CAC065-302338- /O.EXP.KSGX.FF.W.0036.000000T0000Z-120830T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ RIVERSIDE CA- 429 PM PDT THU AUG 30 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 430 PM PDT FOR WEST CENTRAL RIVERSIDE COUNTY... MOST OF THE PRECIPITATION HAD BECOME LIGHT...AND NO FURTHER FLASH FLOODING IS EXPECTED IN THE INLAND EMPIRE THIS AFTERNOON. HOWEVER...SOME PONDING OF WATER WILL CONTINUE ON ROADWAYS FROM PREVIOUS HEAVY RAINS THROUGH ABOUT 500 PM...INCLUDING NEAR LAKE ELSINORE AND SUN CITY. LAT...LON 3400 11734 3400 11702 3375 11695 3367 11741 $$ MAXWELL
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, 2:38 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 40 min |
| Aug 30, 2:45 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 60 min |
| Aug 30, 3:10 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
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.