Alert archive / Texas / Flash Flood Warnings in 1993

Flash Flood Warning 12, NWS Austin/San Antonio, TX

May 23, 1993Bexar County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 23, 1993, 10:28 AM CDT for Bexar County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
May 23, 1993, 10:28 AM CDT (15:28 UTC)
Expired
May 23, 1993, 2:30 PM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Bexar County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 3.5 hours before the alert went out and 223 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 1993-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1725 joules per kilogram.LCLEL10008507005003002001001 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 1993-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 117 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
1725 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
568 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
117 m²/s²
0-3 km storm-relative helicity
161 m²/s²
Significant tornado parameter
0.9
Supercell composite
5.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 231529
FFWSAT
TXC029-231930-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1028 AM CDT SUN MAY 23 1993
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  230 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH TEXAS
 
   ...BEXAR COUNTY
 
RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN IN WESTERN BEXAR
COUNTY AND EASTERN MEDINA COUNTY EXTENDING SOUTHWARD INTO ATASCOSA AND
FRIO COUNTIES. THESE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT
AROUND 20 MILES AN HOUR. AT THIS RATE OF MOVEMENT THE STORMS WILL BE IN
THE SAN ANTONIO METROPOLITAN AREA WITHIN THE NEXT 15 TO 20 MINUTES.
 
ANY ADDITONAL HEAVY RAIN WILL LIKELY PRODUCE FLOODING SINCE THE GROUND
IS ALREADY SATURATED FROM RAINS WHICH OCCURRED EARLIER THIS MORNING.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT.
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT AT:TEMPT TO
CROSS BRIDGES...OR LOW SPOTS IF WATER COVERS THE ROADWAY.  NEVER TRY
TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT TO ESCAPE
RISING WATER DURING THREATENING RAINS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 23, 9:01 AM CDTFlash Flood WarningEWXAtascosa4 hr
May 23, 10:49 AM CDTFlash Flood WarningEWXWilson4 hr
May 23, 11:53 AM CDTFlash Flood WarningEWXGonzales4 hr
May 23, 12:54 PM CDTFlash Flood WarningEWXAtascosa5 hr
May 23, 2:46 PM CDTFlash Flood WarningEWXWilson3 hr

Nearby

Flash Flood Warnings in Texas, 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.