Alert archive / California / Tornado Warnings in 1991
Tornado Warning 2, NWS Los Angeles, CA
NWS Los Angeles, CA issued this tornado warning at Mar 20, 1991, 2:09 PM PST for San Bernardino County, California. It was in force for 51 min.
The area
The counties it named.
The facts
- Issued
- Mar 20, 1991, 2:09 PM PST (22:09 UTC)
- Expired
- Mar 20, 1991, 3:00 PM PST
- In force
- 51 min
- Issued by
- NWS Los Angeles, CA
- Area
- Whole counties
County San Bernardino County, CA
The nearest sounding before it
Edwards AFB, CA (KEDW), launched 12:00Z, 10.2 hours before the alert went out and 148 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
- 1105 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLAX 202205 TORLAX CAC071-202300- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE LOS ANGELES CA 209 PM PST WED MAR 20 1991 THE NATIONAL WEATHER SERVICE IN LOS ANGELES HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 300 PM PST FOR PEOPLE IN THE FOLLOWING LOCATION...... IN SOUTHERN CALIFORNIA ...SOUTHWESTERN SAN BERNARDINO COUNTY A TORNADO HAS BEEN REPORTED IN THE MUSCOY AREA OF SAN BERNARDINO AT 145 PM. NO INFORMATION ON THE MOVEMENT WAS GIVEN...BUT THE TORNADO IS EXPECTED TO BE SHORT LIVED. IN ADDITION...A LARGE FUNNEL CLOUD HAS BEEN REPORTED IN THE DEVORE AREA WITHIN THE PAST HOUR. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
What forecasters said that day
The local office's own words before this tornado 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, Mar 20, 9:03 AM PST, 5 hours 6 minutes before
CAZALL-202100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LOS ANGELES CA 9 AM PST TUE MAR 20 1991 ...WINTER STORM WARNING FOR THE SOUTHERN CALIFORNIA MOUNTAIN AREAS THROUGH THIS AFTERNOON... ...SNOW ADVISORY FOR THE HIGHER ELEVATIONS OF THE MOJAVE DESERT... ...STRONG THUNDERSTORMS POSSIBLE OVER THE COASTAL AND VALLEY AREAS... A STRONG COLD FRONT IS MOVING THROUGH SOUTHERN CALIFORNIA THIS MORNING...AND AN UNSTABLE AIRMASS WILL FOLLOW THIS AFTERNOON AND EVENING. THE SNOW LEVEL HAS LOWERED TO 3000 FEET...AND A WINTER STORM WARNING CONTINUES IN EFFECT FOR THE MOUNTAINS WHERE 8 TO 14 INCHES OF SNOW IS POSSIBLE THROUGH THIS EVENING. IN ADDITION...SNOW HAS BEEN REPORTED IN THE MOJAVE AREA THIS MORNING...AND A SNOW ADVISORY HAS BEEN ISSUED FOR AREAS ABOVE 3000 FEET IN THE MOJAVE DESERT THROUGH THIS EVENING WHERE...2 TO 4 INCHES OF SNOW IS POSSIBLE. PEOPLE PLANNING TRAVEL INTO THE MOUNTAINS AND HIGHER DESERT AREAS TODAY SHOULD PREPARE FOR WINTER DRIVING CONDITIONS...CARRY CHAINS AND WARM CLOTHING. CHECK ROAD CONDITIONS BEFORE LEAVING AS MANY ROADS REQUIRE CHAINS...OR ARE CLOSED. THE AIRMASS WILL BE VERY UNSTABLE TODAY...AND THIS WILL RESULT IN STRONG THUNDERSTORMS IN THE COASTAL AND VALLEY AREAS. THESE STORMS MAY PROUDCE SMALL HAIL...FREQUENT LIGHTNING...AND WINDS GUSTING TO 50 MPH OR MORE. IF YOU ARE OUTSIDE AND A THUNDERSTORM APPROACHES...SEEK SHELTER INDOORS. THE AIRMASS WILL CONTINUE UNSTABLE THROUGH THURSDAY...WITH SCATTERED SHOWERS AND A FEW THUNDERSTORMS CONTINUING. THE NEXT STATEMENT WILL BE ISSUED 130 PM. PETERSON
Special weather statement, Mar 20, 10:39 AM PST, 3 hours 30 minutes before
CAZ003-004-210000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SANTA MARIA CA 1035 AM PST WED MAR 20 1991 ...POSSIBLE THUNDERSTORMS WITH GUSTY WINDS AND SMALL HAIL ON THE CENTRAL CALIFORNIA COAST THIS AFTERNOON... THE CORE OF A VERY COLD LOW PRESSURE SYSTEM WILL BE MOVING OVER THE CENTRAL CALIFORNIA COAST...INCLUDING SANTA BARBARA...DURING THE NEXT 6 HOURS. IT WILL BE ACCOMPANIED BY AN AREA OF SCATTERED SHOWERS AND THUNDERSTORMS...SOME OF WHICH MAY CONTAIN BRIEF HEAVY RAINFALL... GUSTY WINDS UP TO 45 MILES AN HOUR...AND SMALL HAIL. AT 1030 AM PST...SATELLITE IMAGERY SHOWED SCATTERED SHOWERS AND POSSIBLE THUNDERSTORMS JUST OFFSHORE. THEY WERE MOVING TO THE EAST AT 25 MILES AN HOUR. ALL PERSONS IN SAN LUIS OBISPO COUNTY AND SANTA BARBARA COUNTY SHOULD STAY ABREAST OF THE LATEST WEATHER CONDITIONS. BE PREPARED FOR POSSIBLE GUSTY WINDS...HEAVY RAIN...AND SMALL HAIL. IF OUTSIDE AND THREATENING WEATHER APPROACHES...SEEK SOME xSORT OF SHELTER IMMEDIATELY. ALL SMALL CRAFT ALONG THE IMMEDIATE CENTRAL COAST ARE ADVISED TO SEEK SAFE HARBOR FOR THE REST OF TODAY. TRM
Special weather statement, Mar 20, 1:34 PM PST, 35 minutes before
CAZ003-004-210100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SANTA MARIA CA 130 PM PST WED MAR 20 1991 ...FLASH FLOOD WATCH CONTINUES TODAY UNTIL 6 PM FOR SAN LUIS OBISPO AND NORTHERN SANTA BARBARA COUNTY... ...URBAN AND SMALL STREAM ADVISORY FOR SAN LUIS OBISPO AND SANTA BARBARA COUNTY UNTIL 4 PM... ...THUNDERSTORMS WITH HAIL OVER SAN LUIS OBISOP AND SANTA BARBARA COUNTY... A VERY COLD LOW PRESSURE SYSTEM IS MOVING OVER THE CENTRAL CALIFORNIA COAST THIS AFTERNOON. AT 115 PM SPOTTERS IN THE CITY OF SANTA BARBARA HAVE REPORTED HAIL FROM 1/4 TO 1/2 INCH IN DIAMETER. SCATTERED THUNDERSTORMS HAVE BEEN REPORTED WITH WIDE-SPREAD PEA SIZE HAIL IN BOTH SAN LUIS OBISPO AND SANTA BARBARA COUNTIES. SOME SNOW HAS ALSO FALLEN OVER THE HILLS JUST EAST OF EDNA VALLEY SOUTH OF SAN LUIS OBISPO. OVER THE NEXT 6 HOURS...SCATTERED SHOWERS AND THUNDERSTORMS...SOME OF WHICH MAY CONTAIN BRIEF HEAVY RAINFALL... GUSTY WINDS UP TO 45 MILES AN HOUR...AND SMALL HAIL IS EXPECTED OVER BOTH SAN LUIS OBISPO AND SANTA BARBARA COUNTIES. AT 130 PM PST...SATELLITE IMAGERY SHOWED MORE SCATTERED SHOWERS AND POSSIBLE THUNDERSTORMS OFFSHORE OF THE CENTRAL COAST. THEY WERE MOVING TO THE EAST AT 25 MILES AN HOUR. ALL PERSONS IN SAN LUIS OBISPO COUNTY AND SANTA BARBARA COUNTY SHOULD STAY ABREAST OF THE LATEST WEATHER CONDITIONS. BE PREPARED FOR POSSIBLE GUSTY WINDS...HEAVY RAIN...AND SMALL HAIL. IN ADDITION...MOTORISTS SHOULD DRIVE WITH EXTRA CAUTION IN AREAS OF FLOODING ON STREETS AND HIGHWAYS. DO NOT ATTEMPT TO CROSS FLOODED HIGHWAYS. IF OUTSIDE AND THREATENING WEATHER APPROACHES...SEEK SOME SORT OF SHELTER IMMEDIATELY. FELSCH
Special weather statement, Mar 20, 1:36 PM PST, 33 minutes before
CAZ003-004-011-015-210100- SPECIAL WEATHER STATEMENT ...CORRECTION FOR CODE... NATIONAL WEATHER SERVICE SANTA MARIA CA 130 PM PST WED MAR 20 1991 ...FLASH FLOOD WATCH CONTINUES TODAY UNTIL 6 PM FOR SAN LUIS OBISPO AND NORTHERN SANTA BARBARA COUNTY... ...URBAN AND SMALL STREAM ADVISORY FOR SAN LUIS OBISPO AND SANTA BARBARA COUNTY UNTIL 4 PM... ...THUNDERSTORMS WITH HAIL OVER SAN LUIS OBISOP AND SANTA BARBARA COUNTY... A VERY COLD LOW PRESSURE SYSTEM IS MOVING OVER THE CENTRAL CALIFORNIA COAST THIS AFTERNOON. AT 115 PM SPOTTERS IN THE CITY OF SANTA BARBARA HAVE REPORTED HAIL FROM 1/4 TO 1/2 INCH IN DIAMETER. SCATTERED THUNDERSTORMS HAVE BEEN REPORTED WITH WIDE-SPREAD PEA SIZE HAIL IN BOTH SAN LUIS OBISPO AND SANTA BARBARA COUNTIES. SOME SNOW HAS ALSO FALLEN OVER THE HILLS JUST EAST OF EDNA VALLEY SOUTH OF SAN LUIS OBISPO. OVER THE NEXT 6 HOURS...SCATTERED SHOWERS AND THUNDERSTORMS...SOME OF WHICH MAY CONTAIN BRIEF HEAVY RAINFALL... GUSTY WINDS UP TO 45 MILES AN HOUR...AND SMALL HAIL IS EXPECTED OVER BOTH SAN LUIS OBISPO AND SANTA BARBARA COUNTIES. AT 130 PM PST...SATELLITE IMAGERY SHOWED MORE SCATTERED SHOWERS AND POSSIBLE THUNDERSTORMS OFFSHORE OF THE CENTRAL COAST. THEY WERE MOVING TO THE EAST AT 25 MILES AN HOUR. ALL PERSONS IN SAN LUIS OBISPO COUNTY AND SANTA BARBARA COUNTY SHOULD STAY ABREAST OF THE LATEST WEATHER CONDITIONS. BE PREPARED FOR POSSIBLE GUSTY WINDS...HEAVY RAIN...AND SMALL HAIL. IN ADDITION...MOTORISTS SHOULD DRIVE WITH EXTRA CAUTION IN AREAS OF FLOODING ON STREETS AND HIGHWAYS. DO NOT ATTEMPT TO CROSS FLOODED HIGHWAYS. IF OUTSIDE AND THREATENING WEATHER APPROACHES...SEEK SOME SORT OF SHELTER IMMEDIATELY. FELSCH
The office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 19, 11:05 PM PST | Flash Flood Warning | LOX | San Luis Obispo, Santa Barbara | 3 hr |
| Mar 20, 12:58 AM PST | Flash Flood Warning | LOX | San Luis Obispo, Santa Barbara | 2 hr |
| Mar 20, 11:30 AM PST | Tornado Warning | LOX | Riverside | 60 min |
Nearby
Tornado Warnings in California, 1991Every tornado warning in 1991Tornadoes in 1991
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.