Alert archive / California / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 3, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Aug 11, 1990, 8:15 PM PDT for Imperial County, California. It was in force for 75 min.
The area
The counties it named.
The facts
- Issued
- Aug 11, 1990, 8:15 PM PDT (03:15 UTC)
- Expired
- Aug 11, 1990, 9:30 PM PDT
- In force
- 75 min
- Issued by
- NWS San Diego, CA
- Area
- Whole counties
County Imperial 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 00:00Z, 3.3 hours before the alert went out and 173 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
- 269 J/kg
- Mixed-layer CIN
- -535 J/kg
- Mixed-layer LCL
- 1941 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 11, 3:00 PM PDT, 5 hours 15 minutes before
CAZ013-092158 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 2:58 PM PDT SAT AUG 11 1990 SAN DIEGO RADAR INDICATES AN INTENSIFYING AREA OF THUNDERSTORM IN THE TRIANGLE OF HEMET...LAKE HENSHAW AND FALLBROOK. STRONG THUNDERSTORMS IN THIS AREA APPEAR STATIONARY AND COULD BE PRODUCING LOCAL FLOODING. PERSONS IN THIS ARE ADVISED TO TAKE PRECAUTION AND TAKE THE HIGH GROUND IF FLOODING IS OBSERVED OR IF YOU ARE HEADING FOR THIS AREA YO(UR TRIP SHOULD BE TEMPORARILY POSTPONED. CAMPERS AND PEOPLE TRAVELING THROUGH THE AREA AROUND RAINBOW AND RANCHO CALIFORNIA WILL BE NEAR THE AREA OF HEAVY RAINS AND DRIVING COULD BE HAZARDOUS. SHIGEHARA
Special weather statement, Aug 11, 7:47 PM PDT, 28 minutes before
CAZ018-120240 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 7:40 PM PDT SAT AUG 11 1990 ...A SEVERE THUNDERSTORM WARNING AND FLASH FLOOD WARNING HAS BEEN ISSUED FOR NORTHEASTERN...EASTERN...AND SOUTHEASTERN IMPERIAL COUNTY AND SOUTHEASTERN RIVERSIDE COUNTY UNTIL 9:30 PM. AT 7PM...THIS ACTIVE STORM APPEARS TO BE DRIFTING TO THE SOUTHWEST AND SOME OF THIS ACTIVE STORM WILL MOVE INTO EASTERN IMPERIAL COUNTY PRODUCING WINDS IN EXCESS OF 55 MPH, STRONG LOCAL FLOODING, FREQUENT LIGHTNING, AND POSSIBLE HAIL. THIS IS A DANGEROUS STORM AND ALL RESIDENTS SHOULD TAKE NECCESSARY PRECAUTIONS. MOTORISTS PLEASE AVOID ALL OF EASTERN IMPERIAL COUNTY AND SOUTHEASTERN RIVERSIDE COUNTY kIF POSSIBLE. BEWARE OF LOW LYING AREAS WHERE HIGH WATERS FILL IN RAPIDLY. HASTRUP
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 12, 2:58 PM PDT | Flash Flood Warning | SGX | San Diego | 62 min |
Nearby
Severe Thunderstorm Warnings in California, 1990Every severe thunderstorm 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.