Alert archive / California / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 13, NWS Los Angeles, CA
NWS Los Angeles, CA issued this severe thunderstorm warning at Aug 6, 1990, 8:00 PM PDT for Riverside County, California. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Aug 6, 1990, 8:00 PM PDT (03:00 UTC)
- Expired
- Aug 6, 1990, 8:55 PM PDT
- In force
- 55 min
- Issued by
- NWS Los Angeles, CA
- Area
- Whole counties
County Riverside 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, 3.0 hours before the alert went out and 154 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
- 1 J/kg
- Mixed-layer CIN
- -838 J/kg
- Mixed-layer LCL
- 1663 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 124 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 6, 2:19 PM PDT, 5 hours 41 minutes before
CAZALL-070000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LOS ANGELES CA 220 PM PDT MON AUG 6 1990 ...HEAVY THUNDERSTORM NEAR REDLANDS... AS OF 215 PM RADAR AND SATELLITE INDICATED THUNDERSTORMS CONTINUING TO DEVELOP OVER ALL OF SOUTHERN CALIFORNIA. A HEAVY THUNDERSTORM WAS LOCATED NEAR REDLANDS...AND WAS MOVING TOWARDS THE WEST. THIS STORM WILL LIKELY PRODUCE BRIEF HEAVY RAIN...STRONG GUSTY WINDS AND FREQUENT LIGHTNING AS IT MOVES THROUGH THE AREA. CONDITIONS ARE FAVORABLE FOR STORMS TO CONTINUE TO FORM OVER THE MOUNTAIN AND DESERT AREAS THROUGH THIS AFTERNOON AND EVENING...WITH SOME OF THESE MOVING OVER THE COASTAL AND VALLEY AREAS. THESE STORMS MAY PRODUCE STRONG WINDS...FREQUENT LIGHTNING AND BRIEF HEAVY RAIN. WINDS GUSTING TO 50 MPH ARE POSSIBLE IN DESERT AREAS... WITH REDUCED VISIBILITIES IN BLOWING DUST AND SAND. PERSONS ARE URGED TO USE CAUTION AND OBSERVE THE RULES OF SAFETY CONCERNING THUNDERSTORMS. IF YOU ARE OUTSIDE AND A THUNDERSTORM APPROACHES...SEEK SHELTER INDOORS. PETERSON
Special weather statement, Aug 6, 6:02 PM PDT, 1 hour 58 minutes before
CA003-004-011-015-070415- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SANTA MARIA CA 600 PM PDT MON AUG 06 1990 ...THUNDERSTORMS IN THE SOUTHERN MOUNTAINS OF SAN LUIS OBISPO COUNTY AND EASTERN SANTA BARBARA COUNTY... AN AREA OF THUNDERSTORMS DEVELOPED OVER THE MOUNTAINS OF THE THE CENTRAL COAST. REPORTS INDICATED LIGHNING AND RAINSHOWERS WITH GUSTY WINDS IN THE LOS PADRES NATIONAL FOREST NEAR CUYAMA AND SCATTERED THUNDERSTORM ACTIVITY IN THE SANTA YNEZ AND SIERRA MADRE MOUNTAINS IN SANTA BARABRA COUNTY. A SPOTTER IN SANTA MARIA AREA REPORTED HEARING THUNDER AT 515 PM. NOT MUCH RAINFALL IS EXPECTED FROM THESE STORMS BUT DANGEROUS LIGHTNING AND STRONG GUSTY WINDS CAN BE EXPECTED OVER THE NEXT FEW HOURS UNTIL THEY BEGIN TO DIMINISH LATER TONIGHT. IF YOU ARE TRAVELLING TO OR IN THE FOOTHILLS AND MOUNTAINS WATCH FOR LIGHTNING AND STRONG GUSTY WINDS IF THUNDERSTORMS APPROACH. FURTHER STATEMENTS WILL BE ISSUED AS NECESSARY. DR
The office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 5:50 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 2 hr |
| Aug 6, 8:00 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 55 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.