Alert archive / California / Flash Flood Warnings in 1991

Flash Flood Warning 1, NWS Eureka, CA

June 24, 1991Lake County, Mendocino County, California

NWS Eureka, CA issued this flash flood warning at Jun 24, 1991, 5:04 PM PDT for Lake County, Mendocino County, California. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Jun 24, 1991, 5:04 PM PDT (00:04 UTC)
Expired: Jun 24, 1991, 7:30 PM PDT
In force: 2 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 00:00Z, 0.1 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: 669 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 25 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 250005
FFWEKA
BULLETIN-EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EUREKA, CA
504 PM PDT MON JUN 24 1991
CAC033-045-250230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 730 PM PDT FOR PEOPLE IN THE FOLLOWING COUNTIES

   IN THE NORTHWEST PART OF CALIFORNIA
      NORTHERN LAKE...EASTERN MENDOCINO

AT 1645 PDT THUNDERSTORMS WERE OBERSERVED BY RADAR OVER THE EASTERN
PORTION OF MENDOCINO COUNTY AND THE NORTHERN HALF OF LAKE COUNTY.
THESE STORMS ARE PRODUCING HEAVY RAIN WITH HAIL. RADAR REPORTS TOPS
AT 37000 FEET. AS THE STORMS ARE VERY SLOW MOVING..RAINFALL AMOUNTS
COULD BE QUITE HEAVY.

DO NOT ATTEMPT TO DRIVE OVER ROADS COVERED BY FLOOD WATERS.

A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING OR MUD SLIDES AND
FLOWS ARE OCCURRING OR ARE IMMINENT. PERSONS IN THE WARNING AREAS
SHOULD BE PREPARED TO MOVE TO HIGHER GROUND AT A MOMENTS NOTICE IF
HEAVY RAIN OR FLASH FLOODING IS OBSERVED OR IF A HILLSIDE IS
WEAKENING NOTICEABLY OR ABOUT TO GIVE WAY.

PUFFER

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 24, 4:37 PM PDT, 27 minutes before

CAZ-001-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA, CA
429 PM PDT MON JUN 24 1991

 ...THUNDERSTORMS AND HAIL OVER MENDOCINO AND LAKE COUNTIES...

THUNDERSTORMS HAVE DEVELOPED OVER THE EASTERN HALF OF MENDOCINO COUNTY
AND THE NORTHERN HALF OF LAKE COUNTY. SOME HAIL HAS BEEN REPORTED AT
LAKEPORT AND NICE IN LAKE COUNTY. RAINFALL HAS BEEN REPORTED AS LIGHT
TO MODERATE.

THESE STORMS HAVE LITTLE MOVEMENT AT THE CURRENT TIME AND ARE jEXPECTED
TO CONTINUE THROUGH MUCH OF THIS EVENING.

THUNDERSTORMS CAN PRODUCE STRONG WINDS..HAIL..AND LIGHTNING. IF A
THUNDERSTORM MOVES INTO YOUR AREA.. TAKE COVER INDOORS AND DO NOT
USE ELECTRICAL APPLIANCES OR TELEPHONES.

PUFFER

Nearby

Flash Flood Warnings in California, 1991 Every flash flood warning in 1991

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.