Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 33, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 30, 2012, 12:45 PM PDT for 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
- Aug 30, 2012, 12:45 PM PDT (19:45 UTC)
- Expired
- Aug 30, 2012, 3:45 PM PDT
- In force
- 3 hr
- 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, 2:45 PM PDT | FLASH FLOOD | Cathedral City, CA | FLASH FLOOD AT CATHEDRAL CITY WITH RAPIDLY MOVING WATER THAT WAS 1 TO 2 FEET DEEP. SEVERAL ROADS CLOSED, INCLUDING EAST PALM CANYON AND ARABY DRIVE. |
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, 7.8 hours before the alert went out and 124 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.
610 WGUS56 KSGX 301945 FFWSGX CAC065-302245- /O.NEW.KSGX.FF.W.0033.120830T1945Z-120830T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 1245 PM PDT THU AUG 30 2012 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... WESTERN RIVERSIDE COUNTY IN SOUTHERN CALIFORNIA... THIS INCLUDES THE CITY OF PALM SPRINGS... * UNTIL 345 PM PDT * AT 1236 PM PDT...RADAR INDICATED VERY HEAVY RAINS...WITH RATE RATES LOCALLY OF TWO INCHES PER HOUR...OVER THE SAN JACINTO MOUNTAINS AND ADJACENT PARTS OF THE COACHELLA VALLEY. THIS INCLUDES AREAS JUST WEST AND SOUTH OF PALM SPRINGS. PALM CANYON...JUST SOUTH OF PALM SPRINGS IS AT HIGH RISK OF FLASH FLOODING. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RANCHO MIRAGE AND CATHEDRAL CITY 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 3394 11687 3400 11657 3360 11626 3359 11665 $$ MAXWELL
3 follow-up statements
253 WGUS76 KSGX 302036 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 136 PM PDT THU AUG 30 2012 CAC065-302245- /O.CON.KSGX.FF.W.0033.000000T0000Z-120830T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ RIVERSIDE CA- 136 PM PDT THU AUG 30 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM PDT FOR WESTERN RIVERSIDE COUNTY... AT 130 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THAT HEAVY RAIN CONTINUED ALONG THE WEST SLOPES OF THE SAN JACINTO MOUNTAINS BOTH NORTH AND SOUTH OF IDYLLWILD. RAINFALL RATES HAD LOWERED SUBSTANTIALLY JUST WEST AND SOUTH OF PALM SPRINGS...BUT RUNOFF SHOULD CONTINUE THERE UNTIL ABOUT 200 PM. AS THUNDERSTORMS CONTINUOUSLY REDEVELOP...MORE FLASH FLOODING COULD OCCUR OVER THE SAN JACINTO MOUNTAINS THIS AFTERNOON. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PALM SPRINGS AND CATHEDRAL CITY. LAT...LON 3394 11687 3400 11657 3360 11626 3359 11665 $$ MAXWELL
601 WGUS76 KSGX 302124 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 224 PM PDT THU AUG 30 2012 CAC065-302245- /O.CON.KSGX.FF.W.0033.000000T0000Z-120830T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ RIVERSIDE CA- 224 PM PDT THU AUG 30 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM PDT FOR WESTERN RIVERSIDE COUNTY... AT 218 PM PDT...VERY HEAVY RAIN HAD AGAIN MOVED INTO THE PALM CANYON AREA JUST SOUTH OF PALM SPRINGS. FLOODING WILL LIKELY OCCUR SHORTLY AFTER 230 PM IN THIS AREA AS THE RAIN MOVES NORTH AT 10 MPH. THERAIN HAD MOSTLY BECOME LIGHT TO MODERATE IN THE AREAS NORTH AND SOUTH OF IDYLLWILD. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PALM SPRINGS AND CATHEDRAL CITY. 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 3394 11687 3400 11657 3360 11626 3359 11665 $$ MAXWELL
078 WGUS76 KSGX 302241 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 341 PM PDT THU AUG 30 2012 CAC065-302247- /O.EXP.KSGX.FF.W.0033.000000T0000Z-120830T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ RIVERSIDE CA- 341 PM PDT THU AUG 30 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 345 PM PDT FOR WESTERN RIVERSIDE COUNTY... LIGHT TO MODERATE RAIN CONTINUED IN THE SAN JACINTO MOUNTAINS AND COACHELLA VALLEY AT 330 PM. STREET FLOODING OCCURRED AROUND 300 PM IN PALM SPRINGS...AND A FEW LOCATIONS HAD AT LEAST ONE INCH OF RAINFALL...INCLUDING 1.13 INCHES AT DEEP CREEK CANYON...SOUTH OF PALM DESERT. WATER WILL CONTINUE TO COVER SOME STREETS AND LOW LYING AREAS THROUGH ABOUT 430 PM...BUT NO NEW FLASH FLOODING IS EXPECTED IN THE PALM SPRINGS AREA OR ADJACENT DESERT SLOPES. LAT...LON 3394 11687 3400 11657 3360 11626 3359 11665 $$ 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, 12:50 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 |
| 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.