Alert archive / California / Flash Flood Warnings in 1997
Flash Flood Warning 22, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Jan 1, 1997, 10:59 PM PST for San Mateo County, Santa Clara County, Santa Cruz County, California. It was in force for 3 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 1, 1997, 10:59 PM PST (06:59 UTC)
- Expired
- Jan 2, 1997, 1:30 AM 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 radar
The San Francisco radar (KMUX), 14 km from the middle of the area, began a volume at 07:00 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, 7.0 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 533 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- 216 m²/s²
- 0-3 km storm-relative helicity
- 322 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 020702 FFWSFO CAC081-085-087-020930- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN FRANCISCO CA 1059 PM PST WED JAN 1 1997 THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 130 AM PST FOR PEOPLE IN THE FOLLOWING LOCATIONSS... IN CENTRAL CALIFORNIA ...SOUTHWESTERN SAN MATEO COUNTY...WESTERN SANTA CLARA COUNTY ...SANTA CRUZ COUNTY THE SAN LORENZO IS CURRENTLY RECEEDING FROM ITS PEAK OF 17 FT AT 7 PM WEDNESDAY AND IS CURRENTLY AT 14.5 FEET. THE CORROLITOS CRESTED AT 8PM WEDNESDAY OF 12.5 FEET. ALL SMALL RIVERS..STREAMS..AND CREEKS ARE CURRENTLY RECEDING...HOWEVER...RADAR AND SATELLITE SHOW SCATTERED AREAS OF RAIN THAT WILL MOVE THROUGH THESE COUNTIES OVER THE NEXT TWO TO THREE HOURS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT'S IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS. DIAZ/MILLER
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 5:03 PM PST | Flash Flood Warning | MTR | Santa Clara | 117 min |
| Jan 1, 7:00 PM PST | Flash Flood Warning | MTR | San Mateo, Santa Clara, Santa Cruz | 4 hr |
| Jan 1, 7:22 PM PST | Flash Flood Warning | MTR | San Luis Obispo | 6 hr |
| Jan 2, 5:52 AM PST | Flash Flood Warning | MTR | San Mateo, Santa Clara, Santa Cruz | 3 hr |
| Jan 2, 5:52 AM PST | Flash Flood Warning | MTR | Alameda, Contra Costa | 3 hr |
| Jan 2, 11:45 AM PST | Flash Flood Warning | MTR | Alameda, San Mateo, Santa Clara, Santa Cruz | 4 hr |
| Jan 2, 11:45 AM PST | Flash Flood Warning | MTR | Monterey | 4 hr |
| Jan 2, 11:45 AM PST | Flash Flood Warning | MTR | 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.