Alert archive / California / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 13, NWS Los Angeles, CA
NWS Los Angeles, CA issued this severe thunderstorm warning at Aug 12, 1994, 3:38 PM PDT for Orange County, Riverside County, California. It was in force for 52 min.
The area
The counties it named.
The facts
- Issued
- Aug 12, 1994, 3:38 PM PDT (22:38 UTC)
- Expired
- Aug 12, 1994, 4:30 PM PDT
- In force
- 52 min
- Issued by
- NWS Los Angeles, CA
- Area
- Whole counties
Counties Orange County, CA, Riverside County, CA
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 10.6 hours before the alert went out and 105 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
- 2 J/kg
- Mixed-layer CIN
- -877 J/kg
- Mixed-layer LCL
- 2200 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 33 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 122239 RRA
SVRLAX
CAC059-065-122330-
BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LOS ANGELES CA
338 PM PDT FRI AUG 12 1994
THE NATIONAL WEATHER SERVICE IN LOS ANGELES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 PM PDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
IN SOUTH CALIFORNIA
...WESTERN RIVERSIDE COUNTY...
...INCLUDING THE LAKE ELSINORE AREA...
AT 330 PM, LATEST SULPHER MOUNTAIN DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM HAD DEVELOPED OVER THE LAKE ELSINORE AREA, IN AND AROUND
INTERSTATE 15. THIS STORM IS MOVING SOUTHWEST AT 13 MPH.
.
THIS STORM MAY DRIFT OVER THE EASTERN PART OF ORANGE COUNTY DURING
THE NEXT HOUR.
PERSONS SHOULD BE PREPARED TO TAKE COVER IMMEDITATELY AS THIS STORM
APPROACHES.
THIS STORM MAY CONTAIN HEAVY RAIN, LOCAL FLOODING, AND STRONG GUSTY
WINDS.
ENTREKINWhat 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 12, 12:00 PM PDT, 3 hours 38 minutes before
CAZ051-052-018-132000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LOS ANGELES CA 1200 PM PDT SAT AUG 12 1994 ...SCATTERED THUNDERSTORMS DEVELOPING OVER THE SAN BERNARDINO MOUNTAINS... AT 12 PM PDT, SULPHUR MOUNTAIN DOPPLER RADAR INDICATED A THUNDERSTORM HAD DEVELOPED IN THE SAN BERNARDINO MOUNTAINS, OVER BIG BEAR CITY. SPOTTER REPORTS DURING THE LAST HALF HOUR INDICATED A THUNDERSTORM WITH HEAVY RAIN AND SMALL HAIL. THESE STORMS WILL CONTINUE TO INTENSIFY DURING THE AFTERNOON HOURS, AND WILL SPREAD INTO SOME DESERT COMMUNITIES DURING THE AFTERNOON. PERSONS IN THESE AREAS SHOULD KEEP A WATCHFUL EYE ON THESE STORMS, AS LOCALIZED FLOODING MAY OCCUR, ALONG WITH HEAVY RAIN, SMALL HAIL, AND STONG GUSTY WINDS. ADDITIONAL RADAR DATA SHOWED SOME SCATTERED LIGHT SHOWERS OVER THE WEST SANTA BARBARA CHANNEL AREA. MOST OF THIS ACTIVITY WAS LIGHT, AND WAS MOVING NORTHWEST TOWARDS POINT CONCEPTION. ENTREKIN
Special weather statement, Aug 12, 12:10 PM PDT, 3 hours 28 minutes before
CAZ013-018-122100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LOS ANGELES CA 1210 PM PDT FRI AUG 12 1994 ...THUNDERSTORMS DEVELOPING OVER THE MOUNTAINS... AT 1200 PM, SULPHER MOUNTAIN DOPPLER RADAR AND CONVENTIONAL RADAR INDICATED SCATTERED THUNDERSTORMS HAD DEVELOPED OVER THE MOUNTAINS OF SOUTHERN CALIFORNIA. THE ACTIVITY WAS CONCENTRATED OVER THE SAN BERNARDINO MOUNTAINS NEAR BIG BEAR, WHERE A SPOTTER REPORTED A THUNDERSHOWER OVER THE SUGARLOAF AREA. ADDITIONAL THUNDERSTORMS WERE ALSO DEVLEOPING OVER THE SAN JACINTO, AND SAN DIEGO COUNTY MOUNTAIN AREAS. THE THUNDERSTORMS WILL CONTINUE TO INTENSIFY IN THESE AREAS, AND WILL SPREAD INTO SOME DESERT COMMUNITIES DURING THE AFTERNOON. THESE STORMS MAY PRODUCE HEAVY RAIN, LIGHTNING, AND STRONG GUSTY WINDS. PERSONS IN THESE AREAS SHOULD KEEP A WATCHFUL EYE ON THESE STORMS, AS LOCALIZED FLOODING MAY OCCUR. IF YOU ARE IN OR NEAR THESE THUNDERSTORMS, TAKE SHELTER IMMEDIATELY. ENTREKIN
Special weather statement, Aug 12, 12:25 PM PDT, 3 hours 13 minutes before
CAZ013-018-122100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LOS ANGELES CA 1210 PM PDT FRI AUG 12 1994 ...THUNDERSTORMS DEVELOPING OVER THE MOUNTAINS... AT 1200 PM, SULPHER MOUNTAIN DOPPLER RADAR AND CONVENTIONAL RADAR INDICATED SCATTERED THUNDERSTORMS HAD DEVELOPED OVER THE MOUNTAINS OF SOUTHERN CALIFORNIA. THE ACTIVITY WAS CONCENTRATED OVER THE SAN BERNARDINO MOUNTAINS NEAR BIG BEAR, WHERE A SPOTTER REPORTED A THUNDERSHOWER OVER THE SUGARLOAF AREA. ADDITIONAL THUNDERSTORMS WERE ALSO DEVLEOPING OVER THE SAN JACINTO, AND SAN DIEGO COUNTY MOUNTAIN AREAS. THE THUNDERSTORMS WILL CONTINUE TO INTENSIFY IN THESE AREAS, AND WILL SPREAD INTO SOME DESERT COMMUNITIES DURING THE AFTERNOON. THESE STORMS MAY PRODUCE HEAVY RAIN, LIGHTNING, AND STRONG GUSTY WINDS. PERSONS IN THESE AREAS SHOULD KEEP A WATCHFUL EYE ON THESE STORMS, AS LOCALIZED FLOODING MAY OCCUR. IF YOU ARE IN OR NEAR THESE THUNDERSTORMS, TAKE SHELTER IMMEDIATELY. ENTREKIN
Special weather statement, Aug 12, 12:40 PM PDT, 2 hours 58 minutes before
CAZ018-132030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LOS ANGELES CA 1240 PM PDT SAT AUG 12 1994 ...THUNDERSTORM OVER BIG BEAR LAKE AREA... AT 1230 PM PDT, SULPHUR MOUNTAIN DOPPLER RADAR CONTINUED TO SHOW A STRONG THUNDERSTORM OVER THE SAN BERNARDINO MOUNTAINS, AROUND BIG BEAR CITY. SPOTTER REPORTS DURING THE LAST HOUR CONTINUED TO INDICATE HEAVY RAIN AND NAVY-BEAN SIZED HAIL WITH THIS STORM. PERSONS IN THE BIG BEAR LAKE AREA SHOULD KEEP A WATCHFUL EYE ON THIS STORM, AS LOCALIZED FLOODING MAY OCCUR, ALONG WITH HEAVY RAIN, SMALL HAIL, AND STONG GUSTY WINDS. ENTREKIN
The office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 2:00 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 90 min |
| Aug 12, 3:10 PM PDT | Tornado Warning | LOX | Riverside | 95 min |
| Aug 12, 4:04 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles, San Bernardino | 86 min |
Nearby
Severe Thunderstorm Warnings in California, 1994Every severe thunderstorm warning in 1994
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.