Alert archive / California / Flash Flood Warnings in 1993

Flash Flood Warning 8, NWS Eureka, CA

January 20, 1993Lake County, Mendocino County, California

NWS Eureka, CA issued this flash flood warning at Jan 20, 1993, 11:48 AM PST for Lake County, Mendocino County, California. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Jan 20, 1993, 11:48 AM PST (19:48 UTC)
Expired: Jan 20, 1993, 3:45 PM PST
In force: 4 hr
Issued by: NWS Eureka, CA
Area: Whole counties

Counties Lake County, CA, Mendocino County, CA

The nearest sounding before it

Oakland, CA (KOAK), launched 12:00Z, 7.8 hours before the alert went out and 188 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: 532 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 342 m²/s²
0-3 km storm-relative helicity: 472 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 
TTAA00 KEKA 201951
FFWEKA
CAC033-045-202345-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EUREKA CA
1148 AM PST WED JAN 20 1993
 
THE NATIONAL WEATHER SERVICE IN EUREKA CHAS HAS EXTENDED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  345 PM PST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...S...
 
IN NORTHWEST CALIFORNIA
 
   ...LAKE COUNTY...MENDOCINO COUNTY
 
AT 11:10 AM THIS MORNING HEAVY RAIN CONTINUED TO FALL IN MENDOCINO AND
LAKE COUNTIES. AT 11:05 MENDOCINO COUNTY RESIDENTS REPORTED THAT THE
GARCIA BRIDGE WAS FLOODED AND THE FLATS NEAR THE GARCIA RIVER HAD BEEN
FLOODED ALL MORNING LONG. MENDOCINO COUNTY SHERRIFFS CONTINUE TO REPORT
WIDSPREAD STREAM FLOODING ALONG WITH WIDESPREAD MUDSLIDES THROUGHOUT
MENDOCINO COUNTY. LAKE COUNTY SHERRIFFS HAVE ALSO REPORTED NUMEROUS
STREAT AND STREAM FLOODING. LAKE COUNTY SHERRIFFS ALSO REPORT WIDESPREAD
FLOODING OF STREAMS AND ROADWAYS. LAKE COUNTY SHERRIFF REPORTED AT 11:35
THAT SCOTTS VALLEY ROAD WAS FLOODED IN AREAS.
 
LATEST SURFACE CHARTS INDICATE THAT MODERATE TO HEAVY RAINS WILL
CONTINUE OVER MENDOCINO AND LAKE COUNTIES THROUGH THE AFTERNOON HOURS.
TONIGHT THE RAIN IS EXPECTED TO DECREASE SLIGHTLY BEFORE HEAVY RAINS
RETURN OVER THE AREA BY EARLY MORNING THURSDAY. RESIDENTS ARE ENCOURAGED
TO CONTINUE TO LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL TV OR RADIO
STATION FOR CHANGING EVENTS.
 
 
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.
 
MOST DEATHS IN FLASH FLOODING 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.
 
TOMALAK

The office that day

Everything else NWS Eureka, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 20, 9:12 AM PST	Flash Flood Warning	EKA	Lake, Mendocino	3 hr
Jan 20, 10:15 AM PST	Flash Flood Warning	EKA	Mendocino	6 hr
Jan 20, 10:15 AM PST	Flash Flood Warning	EKA	Napa, Sonoma	6 hr
Jan 20, 2:32 PM PST	Flash Flood Warning	EKA	Lake, Mendocino	6 hr
Jan 20, 2:35 PM PST	Flash Flood Warning	EKA	Napa, Sonoma	5 hr
Jan 20, 2:35 PM PST	Flash Flood Warning	EKA	Mendocino	5 hr

Nearby

Flash Flood Warnings in California, 1993 Every 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.