Alert archive / California / Flash Flood Warnings in 1986

Flash Flood Warning 3, NWS Sacramento, CA

February 17, 1986Tehama County, California

NWS Sacramento, CA issued this flash flood warning at Feb 17, 1986, 4:00 AM PST for Tehama County, California. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Feb 17, 1986, 4:00 AM PST (12:00 UTC)
Expired
Feb 17, 1986, 12:00 PM PST
In force
8 hr
Issued by
NWS Sacramento, CA
Area
Whole counties

County Tehama County, CA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 12:00Z, 0.0 hours before the alert went out and 254 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-pSkew-T log-p diagram, Medford/Jackson, OR at 12:00Z on 1986-02-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 12:00Z on 1986-02-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 335 square meters per square second.1939587897117136156Sfc1 km3 km6 km9 kmRMLM
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
1069 m above ground
0-6 km bulk shear
103 kt
0-1 km storm-relative helicity
335 m²/s²
0-3 km storm-relative helicity
535 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Feb 17, 3:00 AM PST, 1 hour before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
3 AM PST MON FEB 17 1986

...WINTER STORM WARNING TODAY FOR HIGHER ELEVATIONS OF THE SIERRA
    NEVADA FROM KIGS CANYON NORTHWARD...

HEAVY SNOW CONTINUES TO FALL IN THE SIERRA BUT SNOW LEVELS ARE
BEGINING TO RISE AND BY DAYBREAK SHOULD BE NEAR 6500 FEET IN THE
NORTH AND 8000 FEET IN THE SOUTH. THESE SNOW LEVELS SHOULD PERSIST
UNTIL TONIGHT WHEN THEY WILL BEGIN TO DROP AGAIN. THIS HEAVY WET
SNOW IS RESULTING IN DANGEROUS HIGHWAY TRAVELING CONDITIONS AND
AN EXTREME AVALANCE DANGER EXISTS...ESPECIALLY OVER THE EAST SLOPES.

ANYONE EXPECTING TO TRAVEL OVER THE NEXT FEW DAYS SHOULD MONITOR
THE LATEST WEATHER CONDITIONS FORECASTS AND ADVISORIES AND CHECK
WITH CALTRANS FOR LATEST ROAD CONDITIONS. TRAVELERS THROUGH MOUNTAIN
AREAS SHOULD BE ESPECIALLY PREPARED FOR DIFFICULT AND HAZARDOUS
DRIVING CONDITIONS.

FOR DETAILS ON FLASH FLOODING PLEASE SEE THE LATEST FLASH FLOOD
WATCH BULLETINS AND STATEMENTS.

FOR DETAILS ON RIVER FLOODING PLEASE SEE THE LATEST FLOOD WARNING
BULLETINS AND STATEMENTS.

ADDITIONAL STATEMENTS WILL BE ISSUED AS NEEDED.

NULL

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 17, 10:00 AM PSTFlash Flood WarningSTOTehama14 hr
Feb 17, 11:00 AM PSTFlash Flood WarningSTOShasta13 hr
Feb 17, 11:15 AM PSTFlash Flood WarningSTOTrinity13 hr
Feb 17, 12:30 PM PSTFlash Flood WarningSTONevada, Placer, Sierra, Yuba12 hr
Feb 17, 12:30 PM PSTFlash Flood WarningSTOAlpine, Amador, Calaveras, El Dorado12 hr
Feb 17, 12:30 PM PSTFlash Flood WarningSTOTuolumne12 hr
Feb 17, 1:30 PM PSTFlash Flood WarningSTONevada, Placer, Sierra, Yuba11 hr
Feb 17, 1:30 PM PSTFlash Flood WarningSTOAlpine, Amador, Calaveras, El Dorado, Sacramento, San Joaquin11 hr
Feb 17, 1:30 PM PSTFlash Flood WarningSTOStanislaus, Tuolumne11 hr
Feb 17, 1:30 PM PSTFlash Flood WarningSTOColusa, Yolo11 hr
Feb 17, 1:30 PM PSTFlash Flood WarningSTOSolano11 hr

Nearby

Flash Flood Warnings in California, 1986Every flash flood warning in 1986

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.