Alert archive / California / Flash Flood Warnings in 1993
Flash Flood Warning 2, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Jan 13, 1993, 6:10 AM PST for Santa Clara County, Santa Cruz County, California. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jan 13, 1993, 6:10 AM PST (14:10 UTC)
- Expired
- Jan 13, 1993, 9:00 AM PST
- In force
- 3 hr
- Issued by
- NWS San Francisco Bay Area, CA
- Area
- Whole counties
Counties Santa Clara County, CA, Santa Cruz County, CA
The nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 2.2 hours before the alert went out and 74 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
- 604 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 153 m²/s²
- 0-3 km storm-relative helicity
- 181 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 131420 FFWSFO CAC001-013-085-087-131700- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN FRANCISCO CA 610 AM PST WED JAN 13 1993 THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 9 AM PST FOR PEOPLE IN THE FOLLOWING LOCATIONSS... IN CENTRAL CALIFORNIA ...FLASH FLOOD WARNING FOR SOUTHER/EASTERN ALAMEDA COUNTY AND ALL OF CONTRA COASTA COUNTY... ...FLASH FLOOD AND MUDSLIDE/DEBRIS FLOW WARNING FOR SOUTHERN/WESTERN SANTA CLARA COUNTY AND SANTA CRUZ COUNTY... AT 5.45 AM PST...THE CONTRA COUNTY SHERIFFS DISPATCH REPORTED CREEKS OVERFLOWING WITH SOME FLOODING OF BUILDINGS NEAR THE CREEKS. HIGHWAY 680 NEAR WALNUT CREEK WAS CLOSED SOUTHBOUND DUE TO FLOODING. AT 6 AM PST...THE ARROYO DE LA LAGUNA NEAR PLEASANTON IN ALAMEDA COUNTY WAS AT 16.7 FEET AND THE FLOOD STAGE IS 17.0 FEET. THE WATER FLOWING THROUGH THE ARROYO DE LA LAGUNA WILL EMPTY INTO ALAMEDA CREEK IN NILES CANYON. AT 6 AM PST...THE LLAGAS CREEK NEAR GILROY WAS RISING RAPIDLY AND WAS REPORTED TO BE FLOODING. THE SAN LORENZO RIVER WAS UP TO 13.7 FEET WHICH WAS JUST BELOW THE THE FLOOD STAGE OF 14 FEET. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISVING WATER MOVE UP TO HIGHER GROUND. IN ADDITION...THE HEAVY RAIN WILL CAUSE SOME MUDSLIDES IN SLIDE PRONE AREAS...ESPECIALLY THE SANTA CRUZ MOUNTAINS. HELLER
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 13, 4:10 AM PST | Flash Flood Warning | MTR | Marin | 5 hr |
| Jan 13, 6:10 AM PST | Flash Flood Warning | MTR | Alameda, Contra Costa | 3 hr |
| Jan 13, 9:18 AM PST | Flash Flood Warning | MTR | Alameda | 3 hr |
Nearby
Flash Flood Warnings in California, 1993Every flash flood warning in 1993
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.