Alert archive / California / Flash Flood Warnings in 1992

Flash Flood Warning 8, NWS Los Angeles, CA

February 12, 1992Los Angeles County, San Bernardino County, California

NWS Los Angeles, CA issued this flash flood warning at Feb 12, 1992, 1:02 PM PST for Los Angeles County, San Bernardino County, California. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Feb 12, 1992, 1:02 PM PST (21:02 UTC)
Expired
Feb 12, 1992, 4:00 PM PST
In force
3 hr
Issued by
NWS Los Angeles, CA
Area
Whole counties

Counties Los Angeles County, CA, San Bernardino County, CA

The nearest sounding before it

China Lake (Naf), CA (KNID), launched 12:00Z, 9.0 hours before the alert went out and 134 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.

Skew-T log-pSkew-T log-p diagram, China Lake (Naf), CA at 12:00Z on 1992-02-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, China Lake (Naf), CA at 12:00Z on 1992-02-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1120 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
243 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 flash flood 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, Feb 12, 7:59 AM PST, 5 hours 3 minutes before
CAZ013-122300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOS ANGELES CA
800 AM PST WED FEB 12 1992

...WINTER STORM WARNING HIGHER ELEVATIONS SAN JACINTO MOUNTAINS NORTH
   TODAY...

A VIGOROUS STORM SYSTEM CONTINUES TO AFFECT CENTRAL AND SOUTHERN
CALIFORNIA THIS MORNING. RADAR...SATELLITE...AND SURFACE REPORTS
INDICATE LIGHT TO MODERATE AND LOCALLY HEAVY RAIN FROM THE LOS ANGELES
BASIN TO SANTA BARBARA COUNTY. THE RAIN WAS MOVING EAST.

ALSO...SOUTH WINDS 20 TO 35 MPH HAVE BEEN OBSERVED IN THE THE MOUNTAIN
AREAS WEST AND NORTH OF POINT MUGU.

WINTER STORM WARNINGS CONTINUE FROM THE SAN JACINTO MOUNTAINS NORTH.
5 TO 10 INCHES OF SNOW COULD ACCUMULATE ABOVE 6500 FEET TODAY. ALSO...
SOUTHERLY WINDS 20 TO 35 MPH WITH A FEW GUSTS TO 50 MPH WILL OCCUR...
ESPECIALLY OVER THE NORTHERN RANGES.

PEOPLE TRAVELING INTO THE MOUNTAINS SHOULD BE PREPARED FOR DANGEROUS
WINTER WEATHER CONDITIONS. CARRY CHAINS...ADDITIONAL CLOTHING...ANDi
LISTEN TO THE LATEST WEATHER AND ROAD REPORTS BEFORE VENTURING INTO
THE MOUNTAINS. BE ESPECIALLY CAREFUL IF YOU ARE DRIVING A HIGH PROFILE
OR LIGHT WEIGHT VEHICLE.

THE NEXT STATEMENT WILL BE ISSUED BY 3 PM PST.

STARMER

The office that day

Everything else NWS Los Angeles, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 12, 4:45 AM PSTFlash Flood WarningLOXSanta Barbara2 hr
Feb 12, 6:55 AM PSTFlash Flood WarningLOXSanta Barbara2 hr
Feb 12, 9:37 AM PSTFlash Flood WarningLOXLos Angeles, Ventura2 hr
Feb 12, 11:18 AM PSTFlash Flood WarningLOXLos Angeles, Ventura117 min
Feb 12, 1:02 PM PSTFlash Flood WarningLOXRiverside3 hr

Nearby

Flash Flood Warnings in California, 1992Every flash flood warning in 1992

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.