Alert archive / California / Flash Flood Warnings in 2002

Flash Flood Warning 3, NWS San Francisco Bay Area, CA

December 16, 2002Riverside County, California

NWS San Francisco Bay Area, CA issued this flash flood warning at Dec 16, 2002, 3:18 AM PST for Riverside 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: Dec 16, 2002, 3:18 AM PST (11:18 UTC)
Expired: Dec 16, 2002, 6:00 AM PST
In force: 3 hr
Issued by: NWS San Francisco Bay Area, CA
Area: Whole counties

County Riverside County, CA

The nearest sounding before it

San Diego, CA (KNKX), launched 00:00Z, 11.3 hours before the alert went out and 154 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 776 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS56 KMTR 161118
FFWMTR
CAZ065-161400-

BULLETIN-EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
315 AM PST MON DEC 16 2002

THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO BAY AREA HAS ISSUED A

* FLASH FLOOD WARNING FOR NAPA COUNTY

* UNTIL 600 AM PST

* HEAVY RAIN HAS BEEN FALLING ACROSS NAPA COUNTY FOR THE PAST THREE
HOURS. RAIN RATES IN EXCESS OF ONE HALF TO THREE QUARTERS OF AN INCH
PER HOUR HAVE BEEN REPORTED. THERE HAVE BEEN NUMEROUS REPORTS OF
FLOODING IN AND AROUND THE CITY OF NAPA...INCLUDING:

NAPA CREEK IS OUT OF ITS BANKS
MOST STREETS IN THE CITY OF NAPA ARE UNDER WATER
THE BEHRENS STREET BRIDGE IS UNDER WATER
EVACUATIONS ARE OCCURRING ON BEHRENS STREET

THERE HAVE ALSO BEEN NUMEROUS REPORTS OF FLOODING IN NAPA COUNTY
OUTSIDE THE CITY OF NAPA...INCLUDING:

FLOODING ON SAGE CANYON ROAD
FLOODING AT RUTHERFORD ROAD CROSSROADS
FLOODING AT YOUNTVILLE CROSSROADS
MOBILE HOME PARK IN YOUNTVILLE IS UNDER WATER.

VERY STRONG WINDS ACCOMPANYING THIS STORM IN EXCESS OF 50 MPH ARE
ALSO CAUSING POWER OUTAGES AND DOWNED TREES.

RAINFALL RATES ARE EXPECTED TO GRADUALLY DIMINISH AFTER THE MAIN
FRONTAL PASSAGE LATER THIS MORNING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING.
IF YOU ARE IN THE WARNING AREA AND OBSERVE FLOODING...MOVE TO
HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG CREEKS AND STREAMS
SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO
NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN
DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS...ABANDON IT
IMMEDIATELY AND SEEK HIGHER GROUND.

$$

DYKEMA

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 16, 3:21 AM PST	Flash Flood Warning	MTR	Riverside	3 hr
Dec 16, 3:24 AM PST	Flash Flood Warning	MTR	Napa	3 hr
Dec 16, 6:45 AM PST	Flash Flood Warning	MTR	Santa Cruz	2 hr

Nearby

Flash Flood Warnings in California, 2002 Every flash flood warning in 2002

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.