Alert archive / California / Flash Flood Warnings in 1993

Flash Flood Warning 15, NWS Eureka, CA

January 21, 1993Napa County, Sonoma County, California

NWS Eureka, CA issued this flash flood warning at Jan 21, 1993, 3:45 PM PST for Napa County, Sonoma County, California. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Jan 21, 1993, 3:45 PM PST (23:45 UTC)
Expired
Jan 21, 1993, 10:00 PM PST
In force
6 hr
Issued by
NWS Eureka, CA
Area
Whole counties

Counties Napa County, CA, Sonoma County, CA

The nearest sounding before it

Oakland, CA (KOAK), launched 12:00Z, 11.8 hours before the alert went out and 95 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 12:00Z on 1993-01-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 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 12:00Z on 1993-01-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 square meters per square second.1939587897Sfc1 km3 km6 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
6 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
527 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
205 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 20, 8:53 PM PSTFlash Flood WarningEKALake, Mendocino3 hr
Jan 21, 12:05 AM PSTFlash Flood WarningEKALake, Mendocino9 hr
Jan 21, 12:05 AM PSTFlash Flood WarningEKADel Norte9 hr
Jan 21, 3:45 PM PSTFlash Flood WarningEKAMendocino6 hr

Nearby

Flash Flood Warnings in California, 1993Every 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.