Alert archive / California / Flash Flood Warnings in 1993

Flash Flood Warning 5, NWS Eureka, CA

January 20, 1993Lake County, Mendocino County, California

NWS Eureka, CA issued this flash flood warning at Jan 20, 1993, 9:12 AM PST for Lake County, Mendocino County, California. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jan 20, 1993, 9:12 AM PST (17:12 UTC)
Expired: Jan 20, 1993, 12:15 PM PST
In force: 3 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, 5.2 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 201714
FFWEKA
CAC033-045-202015-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EUREKA CA
912 AM PST WED JAN 20 1993
 
THE NATIONAL WEATHER SERVICE IN EUREKA CHAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1215 PM PST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...S...
 
IN NORTHWEST CALIFORNIA
 
   ...LAKE COUNTY...MENDOCINO COUNTY
 
SHERRIFF REPORTS FROM MENDOCINO COUNTIES HAVE REPORTED WIDESPREAD
FLOODING AND MUDLIDES THROUGHOUT MENDOCINO COUNTY. SEVERAL MUDSLIDES
HAVE OCCURRED ON HWY 20 IN MENDOCINO COUNTY. HWY 175 WAS REPORTED TO
HAVE BEEN FLOODED IN AREAS. FLOODING ON ROADWAYS WAS ALSO REPORTED NEAR
TALMAGE. MENDOCINO COUNTY SHERRIFFS ALSO REPORTED ALMOST ALL STREAMS AND
RIVER BANKS TO BE AT OR ABOVE BANKFUL.
 
A STRONG STORM SYSTEM JUST OFFCOAST OF NORTHERN OREGON HAS BEEN
RESPONSIBLE FOR PRODUCING VERY STRONG WINDS AND BETWEEN 3 AND 11 INCHES
OF RAIN THROUGHOUT NORTHWEST CALIFORNIA. THIS SYSTEM IS EXPECTED TO MOVE
OFF TO THE NORTHEAST TODAY HOWEVER THE FRONT ASSOCIATED WITH THIS SYSTEM
IS EXPECTED TO REMAIN STATIONARY OVER NORTHWEST CALIFORNIA FOR THE NEXT
DAY. THEN A NEW STORM IS FORECAST TO AFFECT NORTHWEST CALIFORNIA ON
THURSDAY. THUS MODERATE TO HEAVY RAINS ARE EXPECTED TO CONTINUE OVER
THE NEXT SEVERAL DAYS.
 
 
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 RISING WATER MOVE UP TO HIGHER GROUND.
 
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, 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, 11:48 AM PST	Flash Flood Warning	EKA	Lake, Mendocino	4 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.