Alert archive / Texas / Flash Flood Warnings in 1990

Flash Flood Warning 62, NWS Austin/San Antonio, TX

October 9, 1990Webb County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Oct 9, 1990, 9:42 AM CDT for Webb County, Texas. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Oct 9, 1990, 9:42 AM CDT (14:42 UTC)
Expired
Oct 9, 1990, 10:45 AM CDT
In force
63 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Webb County, TX

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

Corpus Christi, TX (KCRP), launched 12:00Z, 2.7 hours before the alert went out and 196 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, Corpus Christi, TX at 12:00Z on 1990-10-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2690 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, Corpus Christi, TX at 12:00Z on 1990-10-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.1939Sfc1 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
2690 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
612 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
18 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSAT 091441 RRA
FFWSAT
TXC479-091545-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
942 AM CDT TUE OCT 9 1990
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS REISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1045 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH TEXAS
          ...WEBB
 
NATIONAL WEATHER SERVICE RADAR WAS CONTINUING TO INDICATE A BROAD AREA
OF SHOWERS AND THUNDERSTORMS...SOME PRODUCING VERY HEAVY RAIN...OVER
MUCH OF WEBB COUNTY.  MOVEMENT WAS SLOWLY TO THE SOUTHEAST.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN
REPORTED.
 
REMEMBER...DEATHS DURING FLASH FLOODING ARE FREQUENTLY RELATED TO
MOTORISTS DRIVING3 INTO FLOODED LOW WATER CROSSINGS OR FROM CHILDREN
PLAYING NEAR FLOODED STREAMS OR DRAINAGE AREAS.
 
PLEASE LISTEN TO YOUR LOCAL RADIO...TV OR NOAA WEATHER RADIO STATION
FOR LATER STATEMENTS OR WARNINGS REGARDING THIS SEVERE WEATHER EVENT.

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 9, 4:16 AM CDTFlash Flood WarningEWXBexar, Guadalupe74 min
Oct 9, 4:16 AM CDTSevere Thunderstorm WarningEWXBexar, Guadalupe74 min
Oct 9, 5:31 AM CDTFlash Flood WarningEWXGonzales, Karnes, Wilson119 min
Oct 9, 5:31 AM CDTSevere Thunderstorm WarningEWXGonzales, Karnes, Wilson59 min
Oct 9, 8:48 AM CDTFlash Flood WarningEWXWebb57 min

Nearby

Flash Flood Warnings in Texas, 1990Every flash flood warning in 1990

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.