Alert archive / California / Flash Flood Warnings in 1997
Flash Flood Warning 28, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Jan 2, 1997, 4:00 PM PST for San Mateo County, Santa Clara County, Santa Cruz County, California. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jan 2, 1997, 4:00 PM PST (00:00 UTC)
- Expired
- Jan 2, 1997, 8:00 PM PST
- In force
- 4 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 radar
The San Francisco radar (KMUX), 14 km from the middle of the area, began a volume at 00:04 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Oakland, CA (KOAK), launched 00:00Z, 0.0 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.
- Mixed-layer CAPE
- 7 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 559 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 124 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 KSFO 022351
FFWSFO
CAC001-013-053-081-085-087-030400-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
400 PM PST THU JAN 2 1997
THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS EXTENDED A FLASH
FLOOD WARNING UNTIL 800 PM PST FOR PEOPLE IN THE FOLLOWING
LOCATIONS...
IN CENTRAL CALIFORNIA
...ALAMEDA COUNTY...CONTRA COSTA COUNTY...SAN MATEO COUNTY...
SANTA CLARA COUNTY...SANTA CRUZ COUNTY...AND WESTERN MONTEREY
COUNTY...
BY 340 PM RADAR...SATELLITE...AND SPOTTER REPORTS ARE INDICATING MORE
HEAVY RAINFALL MOVING INTO THE BAY AREA. A LINE OF VERY HEAVY CELLS
IS CURRENTLY ON A LINE FROM ABOUT PESCADERO TO SUNNYVALE AND MILPITAS
WITH A REPORT OF NEARLY A THIRD OF AN INCH OF RAIN IN THE PAST 15
MINUTES. THESE STORMS WILL MOVE SOUTH AND EAST OVER THE WARNING AREA
THROUGH THE LATE AFTERNOON AND EARLY EVENING HOURS. THIS ADDITIONIAL
RAINFALL WILL LEAD TO RENEWED RISES ON STREAMS AND CREEKS IN THE
WARNING AREA.
A FLASH FLOOD WARNING MEANS THAT FLOODING OCCURRING OR IS IMMINENT.
ITS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS... RIVERS...
OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. MUDSLIDES ARE ALSO
POSSIBLE.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.
DYKEMA/NULLThe office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 2, 4:00 PM PST | Flash Flood Warning | MTR | Monterey | 4 hr |
| Jan 2, 4:00 PM PST | Flash Flood Warning | MTR | Alameda, Contra Costa | 4 hr |
Nearby
Flash Flood Warnings in California, 1997Every flash flood warning in 1997
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; radar from the NEXRAD Level II archive.