Alert archive / California / Flash Flood Warnings in 1993

Flash Flood Warning 7, NWS Los Angeles, CA

January 18, 1993Los Angeles County, Orange County, California

NWS Los Angeles, CA issued this flash flood warning at Jan 18, 1993, 1:59 PM PST for Los Angeles County, Orange County, California. It was in force for 1 min.

The area

The counties it named.

The facts

Issued
Jan 18, 1993, 1:59 PM PST (21:59 UTC)
Expired
Jan 18, 1993, 2:00 PM PST
In force
1 min
Issued by
NWS Los Angeles, CA
Area
Whole counties

Counties Los Angeles County, CA, Orange County, CA

The nearest sounding before it

San Diego, CA (KNKX), launched 12:00Z, 10.0 hours before the alert went out and 148 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, San Diego, CA at 12:00Z on 1993-01-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 331 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, San Diego, CA at 12:00Z on 1993-01-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 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
331 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
590 m above ground
0-6 km bulk shear
76 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.7

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 Los Angeles, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 18, 8:30 AM PSTFlash Flood WarningLOXRiverside4 hr
Jan 18, 9:40 AM PSTFlash Flood WarningLOXLos Angeles, Orange, Ventura2 hr
Jan 18, 12:29 PM PSTFlash Flood WarningLOXLos Angeles, Orange91 min

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.