Alert archive / California / Flash Flood Warnings in 1986

Flash Flood Warning 2, NWS Eureka, CA

February 18, 1986Mendocino County, California

NWS Eureka, CA issued this flash flood warning at Feb 18, 1986, 6:30 PM PST for Mendocino County, California. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Feb 18, 1986, 6:30 PM PST (02:30 UTC)
Expired
Feb 19, 1986, 4:00 AM PST
In force
10 hr
Issued by
NWS Eureka, CA
Area
Whole counties

County Mendocino 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, 2.5 hours before the alert went out and 218 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 1986-02-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 13 joules per kilogram.LCLLFCEL10008507005003002001001 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, Oakland, CA at 00:00Z on 1986-02-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 147 square meters per square second.1939587897117136Sfc1 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
13 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
582 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
282 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.

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.