Alert archive / California / Flash Flood Warnings in 1992

Flash Flood Warning 2, NWS San Francisco Bay Area, CA

February 14, 1992San Mateo County, Santa Clara County, Santa Cruz County, California

NWS San Francisco Bay Area, CA issued this flash flood warning at Feb 14, 1992, 5:45 PM PST for San Mateo County, Santa Clara County, Santa Cruz County, California. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Feb 14, 1992, 5:45 PM PST (01:45 UTC)
Expired
Feb 14, 1992, 9:00 PM PST
In force
3 hr
Issued by
NWS San Francisco Bay Area, CA
Area
Whole counties

Counties San Mateo County, CA, Santa Clara County, CA, Santa Cruz County, CA

The nearest sounding before it

Oakland, CA (KOAK), launched 00:00Z, 1.8 hours before the alert went out and 58 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, Oakland, CA at 00:00Z on 1992-02-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 156 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Oakland, CA at 00:00Z on 1992-02-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 209 square meters per square second.1939587897Sfc1 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
156 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
608 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
209 m²/s²
0-3 km storm-relative helicity
264 m²/s²
Significant tornado parameter
0.2
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSFO 150135
FFWSFO
CAC087-085-081-150500-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
US GEOLOGICAL SURVEY MENLO PARK CA
545 PM PST FRI FEB 14 1992
 
...FLASH FLOOD/MUDSLIDE WARNING UNTIL 9PM FOR SOUTHERN SAN
MATEO..WESTERN SANTA CLARA AND SANTA CRUZ COUNTIES...
 
A FLASH FLOOD/MUDSLIDE WARNING IS ISSUED FOR PERSONS NEAR STREAMS IN
THE ABOVE COUNTIES UNTIL 9PM TONIGHT.
 
SOME OF THE MAJOR STREAMS IN THE WARNING AREA INCLUDE..IN SOUTHERN
SAN MATEO COUNTY..PESCADERO..BUTANO..SAN GREGORIO AND SAN FRACISQUITO
CREEKS..IN SANTA CRUZ COUNTY..SAN LORENZO RIVER..SOQUEL..AND
CORRALITOS CREEKS..AND IN WESTERN SANTA CLARA COUNTY..SARATOGA..
CALABAZAS..AND PENITENCIA CREEK.

MOTORISTS SHOULD AVOID DRIVING IN THE SANTA CRUZ MOUNTAINS IF
POSSIBLE..AND SHOULD NOT DRIVE THROUGH ANY WATER FLOWING ACROSS THE
ROAD.  RESIDENTS IN THE AREA SHOULD BE ALERT FOR POSSIBLE FLASH
FLOODING OR SLIDES AND TAKE NECESSARY ACTIVON NOW.  
 
LISTEN TO THE NOAA WEATHER RADIO (KEC-49 AT 162.55 MHZ)...COMMERCIAL R
AND TELEVISION FOR THE LATEST INFORMATION.
 
FURTHER STATEMENTS WILL BE ISSUED AS NECESSARY.
 
BARBATO/PERICHT

The office that day

Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 14, 9:00 PM PSTFlash Flood WarningMTRMonterey, San Mateo, Santa Clara, Santa Cruz7 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.