Alert archive / California / Flash Flood Warnings in 2003
Flash Flood Warning 7, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 20, 2003, 1:04 PM PDT for Riverside County, San Diego County, California. It was in force for 86 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 20, 2003, 1:04 PM PDT (20:04 UTC)
- Expired
- Aug 20, 2003, 2:30 PM PDT
- In force
- 86 min
- Issued by
- NWS San Diego, CA
- Area
- Whole counties
Counties Riverside County, CA, San Diego County, CA
The radar
The San Diego radar (KNKX), 80 km from the middle of the area, began a volume at 20:06 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.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 8.1 hours before the alert went out and 100 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
- 1174 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS56 KSGX 202005 FFWSGX CAC065-073-202130- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 104 PM PDT WED AUG 20 2003 THE NATIONAL WEATHER SERVICE HAS ISSUED A * FLASH FLOOD WARNING FOR... THE MOUNTAINS AND DESERTS OF WESTERN RIVERSIDE COUNTY...INCLUDING PALM CANYON AND THE CITIES OF...PALM SPRINGS...PALM DESERT AND CATHEDRAL CITY ALL MOUNTAIN AND DESERT AREAS OF SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA * UNTIL 230 PM PDT * AT 1254 PM PDT...WEATHER SERVICE DOPPLER RADAR INDICATED SCATTERED THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUING TO DEVELOP OVER THE MOUNTAINS AND DESERTS FROM SOUTH OF MOUNT LAGUNA IN SAN DIEGO COUNTY TO 10 MILES SOUTHWEST OF PALM SPRINGS. THE STORMS WERE MOVING NORTH AT 10 MPH. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. $$ LAT...LON 3394 11688 3262 11644 3264 11615 3397 11641
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 12:27 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Aug 20, 2:30 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino, San Diego | 2 hr |
| Aug 20, 3:09 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 51 min |
Nearby
Flash Flood Warnings in California, 2003Every flash flood warning in 2003
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; radar from the NEXRAD Level II archive.