Alert archive / California / Flash Flood Warnings in 1986

Flash Flood Warning 2, NWS Sacramento, CA

February 15, 1986Butte County, Glenn County, Tehama County, California

NWS Sacramento, CA issued this flash flood warning at Feb 15, 1986, 12:35 AM PST for Butte County, Glenn County, Tehama County, California. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Feb 15, 1986, 12:35 AM PST (08:35 UTC)
Expired
Feb 15, 1986, 9:00 AM PST
In force
8 hr
Issued by
NWS Sacramento, CA
Area
Whole counties

Counties Butte County, CA, Glenn County, CA, 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

Oakland, CA (KOAK), launched 00:00Z, 8.6 hours before the alert went out and 230 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, Oakland, CA at 00:00Z on 1986-02-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 209 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Oakland, CA at 00:00Z on 1986-02-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 square meters per square second.1939587897Sfc1 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
209 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
794 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
0.1
Supercell composite
4.8

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 14, 9:00 PM PST, 3 hours 35 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
9 PM PST FRI FEB 14 1986

...HIGH WIND WARNING TONIGHT FOR THE ENTIRE COAST FROM THE OREGON
       BORDER TO POINT CONCEPTION FOR STRONG GUSTY SOUTH WINDS
         TO 60 MPH...
...WINTER STORM WARNING TONIGHT AND SATURDAY IN THE SIERRA NEVADA
...WINTER STORM WATCH LATE TONIGHT AND SATURDAY IN THE MOUNT SHASTA
          SISKIYOU AREA FOR LOWERING SNOW LEVELS AND GUSTY WINDS...

THE MASSIVE PACIFIC STORM THAT BROUGHT HEAVY RAINS AND HIGH WINDS
TO CALIFORNIA EARLIER TODAY WILL CONTINUE TO CAUSE PROBLEMS TONIGHT
AND SATURDAY.  THE STEADY RAIN HAS NOW GIVEN WAY TO SHOWERS AND
THESE WILL CONTINUE OVERNIGHT AND INTO SATURDAY ACCOMPANIED BY
HEAVY DOWNPOURS OF RAIN AND POSSIBLE THUNDER AND LIGHTNING.

THE STRONG WINDS OF EARLIER TODAY HAVE DECREASED SOMEWHAT AFTER
PEAKING IN THE 60 TO 80 MPH RANGE AT SOME EXPOSED LOCATIONS. GUSTS
OF 40 TO 60 MPH WILL CONTINUE OVERNIGHT ESPECIALLY IN EXPOSED
COASTAL AND HILLTOP LOCATIONS IN THE VICINITY OF THE HEAVY SHOWERS.

IN THE MOUNTAINS THE RAIN IS CHANGING TO SNOW AND HEAVY ACCUMULATIONS
ARE EXPECTED ABOVE ABOUT 5000 TO 7000 FEET. THE STRONG WINDS
ACCOMPANYING THE HEAVY SNOW WILL MAKE TRAVEL VERY HAZARDOUS IF NOT
IMPOSSIBLE.

ANYONE EXPECTING TO TRAVEL OVER THE NEXT TWO DAYS SHOULD MONITOR
THE LATEST WEATHER FORECASTS AND ADVISORIES. TRAVELERS THROUGH
MOUNTAIN AREAS SHOULD BE ESPECIALLY PREPARED FOR VERY DIFFICULT
DRIVING CONDITIONS. PLEASE CONSULT THE FLASH FLOOD STATEMENT FOR
THE LATEST INFORMATION ON HEAVY RAINS AND FLASH FLOOD WATCHES AND
POSSIBLE WARNINGS.

ADDITIONAL SPECIAL WEATHER STATEMENTS WILL BE ISSUED AS NEEDED.

PERICHT
Special weather statement, Feb 14, 11:42 PM PST, 53 minutes before
SPECIAL WEATHER AND RADAR STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CALIF
1135 PM PST FRI FEB 14 1986

....THUNDERSTORMS INCREASING OVER AND WEST OF COAST RANGE....
....THUNDERSTORMS INCREASING OVER NORTHERN SACRAMENTO VALLEY....

AT 1130 PM..VERY HEAVY THUNDERSTORMS WERE CENTERED JUST NORTH OF
WILLIAMS /IN THE SACRAMENTO VALLEY/ AND 10 MILES WEST OF SAN FRAN-
CISCO.  THE CELLS WERE MOVING TOWARD THE NORTHEAST AT 40 MPH.

ISOLATED VERY HEAVY THUNDERSTORMS WERE ALSO SEEN CLUSTERED AROUND
SANTA ROSA AND OVER NORTHERN MARIN COUNTY..THOUGH NOT QUITE AS INTENSE
AT THE TWO CELLS ABOVE.

ALL THIS ACTION WAS PART OF A LARGE AREA OF SHOWERS AND THUNDERSHOWERS
THAT EXTENDED FROM REDDING TO 30 MILES WEST OF MONTEREY.

ELSEWHERE..RAIN AND SNOWSHOWERS WERE SEEN FROM SOUTH OF SUSANVILLE TO
SONORA.  ISOLATED HEAVY SHOWERS WERE DETECTED EAST OF SACRAMENTO AND
EAST OF FAIRFIELD.
A MARTINI

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 14, 5:15 PM PSTFlash Flood WarningSTOTehama4 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.