Alert archive / California / Flash Flood Warnings in 2003
Flash Flood Warning 8, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 20, 2003, 2:30 PM PDT for Riverside County, San Bernardino County, San Diego 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 counties it named.
The facts
- Issued
- Aug 20, 2003, 2:30 PM PDT (21:30 UTC)
- Expired
- Aug 20, 2003, 4:30 PM PDT
- In force
- 2 hr
- Issued by
- NWS San Diego, CA
- Area
- Whole counties
Counties Riverside County, CA, San Bernardino County, CA, San Diego County, CA
The radar
The Santa Ana Mts radar (KSOX), 122 km from the middle of the area, began a volume at 21:34 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, 9.5 hours before the alert went out and 145 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 202131
FFWSGX
CAC065-071-073-202330-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
230 PM PDT WED AUG 20 2003
THE NATIONAL WEATHER SERVICE HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
WESTERN RIVERSIDE COUNTY IN SOUTHWEST CALIFORNIA
THIS INCLUDES PALM CANYON AND THE CITIES OF...PALM SPRINGS...PALM
DESERT...IDYLLWILD
SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHWEST CALIFORNIA
THIS INCLUDES YUCCA VALLEY
EASTERN SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA
THIS INCLUDES MOUNT LAGUNA AND OCOTILLO WELLS
* UNTIL 430 PM PDT
* AT 230 PM PDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY
HEAVY RAIN OVER PARTS OF THE MOUNTAINS AND DESERTS OF SAN
BERNARDINO...RIVERSIDE AND SAN DIEGO COUNTIES.
THE HEAVIEST RAINFALL AT 230 PM WAS FROM MOUNT LAGUNA SOUTH TO THE
MEXICAN BORDER IN SAN DIEGO COUNTY AND ABOVE PALM CANYON IN
RIVERSIDE COUNTY. THUNDERSTORMS WILL MOVE SLOWLY TO THE NORTH AT 10
MPH...AND THE SLOW MOVEMENT WILL ONLY ADD TO FLOODING.
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 3268 11661 3260 11644 3263 11609 3418 11616
3417 11693 3376 11682 3348 11696 3330 11678The 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, 1:04 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 86 min |
| 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.