Alert archive / California / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 1, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Aug 5, 1990, 9:33 PM PDT for Imperial County, California. It was in force for 117 min.
The area
The counties it named.
The facts
- Issued
- Aug 5, 1990, 9:33 PM PDT (04:33 UTC)
- Expired
- Aug 5, 1990, 11:30 PM PDT
- In force
- 117 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, 4.6 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
- 9 J/kg
- Mixed-layer CIN
- -978 J/kg
- Mixed-layer LCL
- 1877 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLAX 060451 COR SVRSAN CAC025-060630- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 945 PM PDT SUN AUG 5 1990 ...CORRECTION... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A SEVERE THUNDER STORM WARNING EFFECTIVE UNTIL 1130 PM PDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST CALIFORNIA ...EASTERN AND CENTRAL IMPERIAL COUNTY... A COMPLEX VERY HEAVY THUNDERSTORM COVERS MUCH OF EASTERN IMPERIAL COUNTY FROM THE PALO VERDE AREA TO EAST OF EL CENTRO. THE STORM IS MOVING TOWARDS THE WEST AND MAY HAVE DAMAGING WINDS IN EXCESS OF 55 55 MPH IS BLOWING DUST AND SAND. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD SEEK SHELTER IN A SAFE PLACE. UNSECURED MOBILE HOMES ARE ESPECIALLY DANGEROUS PLACES TO BE DURING SEVERE WEATHER. BLOWING DUST AND SAND MAY REDUCE THE VISIBILITY TO NEAR ZERO FOR BRIEF PERIODS OF TIME. GREBE
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 5, 9:00 PM PDT, 33 minutes before
CAZ011-018-150735- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 9:00 PM PDT SUN JUL 15 1990 ...A FEW HEAVY THUNDERSTORMS IN NORTHEASTERN IMPERIAL COUNTY... RADAR INDICATES A FEW HEAVY THUNDERSTORMS IN NORTHEASTERN IMPERIAL COUNTY SOUTH OF BLYTHE, CALIFORNIA. THESE STORMS ARE MOVING TOWARD THE WEST 10 TO 20 MPH TOWARD THE CHOCOLATE MOUNTAINS. SOME OF THESE STORMS MAY HAVE VERY STRONG GUSTY WINDS WITH FREQUENT LIGHTNING STRIKES. THE THUNDERSTORMS ARE LIKELY TO CROSS THE CHOCOLATE MOUNTAINS AND APPROACH THE SALTON SEA AREA DURING THE LATE NIGHT AND EARLY MORNING HOURS. TRAVELERS DRIVING OR RESIDING IN THESE REMORE AREAS SHOULD USE EXTRA CAUTION FOR ANY RAPID WEATHER CHANGES AND KEEP ABREAST TO THE LATEST FORECASTS. . HASTRUP
Special weather statement, Aug 5, 9:01 PM PDT, 32 minutes before
CAZ011-018-150735- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 9:00 PM PDT SUN AUG 5 1990 ...A FEW HEAVY THUNDERSTORMS IN NORTHEASTERN IMPERIAL COUNTY... RADAR INDICATES A FEW HEAVY THUNDERSTORMS IN NORTHEASTERN IMPERIAL COUNTY SOUTH OF BLYTHE, CALIFORNIA. THESE STORMS ARE MOVING TOWARD THE WEST 10 TO 20 MPH TOWARD THE CHOCOLATE MOUNTAINS. SOME OF THESE STORMS MAY HAVE VERY STRONG GUSTY WINDS WITH FREQUENT LIGHTNING STRIKES. THE THUNDERSTORMS ARE LIKELY TO CROSS THE CHOCOLATE MOUNTAINS AND APPROACH THE SALTON SEA AREA DURING THE LATE NIGHT AND EARLY MORNING HOURS. TRAVELERS DRIVING OR RESIDING IN THESE REMORE AREAS SHOULD USE EXTRA CAUTION FOR ANY RAPID WEATHER CHANGES AND KEEP ABREAST TO THE LATEST FORECASTS. . HASTRUP
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.