Alert archive / California / Flash Flood Warnings in 1990
Flash Flood Warning 6, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 12, 1990, 2:58 PM PDT for San Diego County, California. It was in force for 62 min.
The area
The counties it named.
The facts
- Issued
- Aug 12, 1990, 2:58 PM PDT (21:58 UTC)
- Expired
- Aug 12, 1990, 4:00 PM PDT
- In force
- 62 min
- Issued by
- NWS San Diego, CA
- Area
- Whole counties
County San Diego County, CA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 10.0 hours before the alert went out and 47 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
- 263 J/kg
- Mixed-layer CIN
- -552 J/kg
- Mixed-layer LCL
- 1170 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -83 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAN 122200 FFWSAN CAC073-122300- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 258 PM PDT SUN AUG 12 1990 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 400 PM PDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHWEST CALIFORNIA ...CENTRAL SAN DIEGO COUNTY ...HEAVY RAINS BETWEEN RANCHITA...JULIAN AND WARNER SPRINGS... SAN DIEGO RADAR INDICATES A STRONG THUNDERSTORM STALLED OVER THE AREA BETWEEN RANCHITA...JULIAN AND WARNER SPRINGS. THE STORM IS CAPABLE OF PRODUCING HEAVY RAINS AND FLOODING AND TRAVELERS ARE ADVISED TO AVOID THIS AREA OR TAKE THE HIGH GROUND WHERE FLOODING IS OCCURRING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. 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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND. MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. SHIGEHARA
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 7:33 PM PDT | Flash Flood Warning | SGX | Imperial | 117 min |
| Aug 11, 7:33 PM PDT | Severe Thunderstorm Warning | SGX | Imperial | 117 min |
| Aug 11, 8:15 PM PDT | Severe Thunderstorm Warning | SGX | Imperial | 75 min |
Nearby
Flash Flood Warnings in California, 1990Every flash flood warning in 1990
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.