Alert archive / California / Tornado Warnings in 1991
Tornado Warning 1, NWS San Diego, CA
NWS San Diego, CA issued this tornado warning at Mar 20, 1991, 12:36 PM PST for San Diego County, California. It was in force for 69 min.
The area
The counties it named.
The facts
- Issued
- Mar 20, 1991, 12:36 PM PST (20:36 UTC)
- Expired
- Mar 20, 1991, 1:45 PM PST
- In force
- 69 min
- Issued by
- NWS San Diego, CA
- Area
- Whole counties
County San Diego County, CA
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 8.6 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
- 62 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 606 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 177 m²/s²
- 0-3 km storm-relative helicity
- 241 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 202039 TORSAN CAC073-202145- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 1236 PM PST WED MAR 20 1991 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 145 PM PST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHWEST CALIFORNIA ...NORTHWESTERN SAN DIEGO COUNTY AND FOR MARINE INTERESTS ON THE COASTAL WATERS FROM THE SAN DIEGO COUNTY LINE TO THE MEXICAN BORDER. A WATERSPOUT OFFSHORE NEAR CAMP PENDELTON MOVED ONSHORE AT 12.30 PM PST BECOMING A TORNADO. IN ADDITION..TWO OTHER FUNNEL CLOUDS WERE REPORTED NEAR THE SHORE. 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. ATKIN
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, 10:58 AM PST, 1 hour 38 minutes before
CAZALL-210500 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 1100 AM PST WED MAR 20 1991 ...ROUGH SEAS AND HIGH SURF TODAY AND THURSDAY... ...WINTER STORM WARNING MOUNTAINS TODAY AND TONIGHT... ...HIGH WIND ADVISORY... ...HIGH SURF ADVISORY HAS BEEN ISSUED FOR SAN DIEGO WATERS TODAY... SURF 4 TO 7 FEET WITH BREAKERS DEVELOPING WITH WINDY AND STORMY CONDITIONS THIS AFTERNOON AND CONTINUING THROUGH THURSDAY. ROUGH CONDITIONS WILL BE DANGEROUS FOR ALL BUT THE MOST EXPERIENCED SWIMMERS. GUSTY DEVELOPING SOUTHWEST WINDS TO 35 MPH THIS AFTERNOON AS ANOTHER STORM ARRIVES IN SAN DIEGO HAS PROMPTED A WIND ADVISORY. GUSTY WINDS WILL CAUSE FLYING DEBRIS AND PRODUCE BROKEN BRANCHES. ANOTHER DEVELOPING STORM THIS AFTERNOON AND TONIGHT WILL BRING NUMEROUS HEAVY SHOWERS AND POSSIBLE THUNDERSHOWERS WITH STRONG GUSTY WINDS TO 35 MPH. SOME OF THESE THUNDERSTORMS COULD HAVE HAIL AND COULD ALSO HAVE WIND GUSTS OVER 35 MPH. HEAVY DEVELOPING RUNOFF CAUSED BY THE DEVELOPING SHOWERS COULD ALSO CREATE URBAN STREET FLOODING AND POSSIBLE MUD SLIDES IN THE NORMALLY PRONE AREAS SUCH AS MISSION VALLEY AND DEL DIOS HIGHWAY. THE NATIONAL WEATHER SERVICE URGEST MOTORISTS TO STAY TUNED TO THE LATEST FORECAST AND TO AVOID FLOODED AREAS. RAINFALL AMOUNTS ARE ESTIMATED 0.50 INCH COASTAL SECTIONS...0.50 TO 1.00 INCH INLAND AND FOOTHILLS AND 0.75 TO 1.50 INCHES MOUNTAINS. DEVELOPING BLOWING AND DRIFTING SNOW IN THE MOUNTAINS HAVE PROMPTED A WINTER STORM WARNING WHERE ANOTHER FOOT OF NEW SNOW IS POSSIBLE. SNOWLEVEL WILL LOWER TO 3500 FEET. SNOWFLURRIES WILL CONTINUE THROUGH THURSDAY. WINDS WILL GUST TO 40 MPH THIS AFTERNOON AND TONIGHT AND EVENING HIGHER NEAR THUNDERST1ORMS. SHIGEHARA
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.