Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 21, NWS Austin/San Antonio, TX

April 4, 1997Travis County, Williamson County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 4, 1997, 1:34 AM CST for Travis County, Williamson County, Texas. It was in force for 116 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 4, 1997, 1:34 AM CST (07:34 UTC)
Expired
Apr 4, 1997, 3:30 AM CST
In force
116 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Travis County, TX, Williamson County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 7.6 hours before the alert went out and 309 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 00:00Z on 1997-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1324 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 00:00Z on 1997-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 square meters per square second.19395878Sfc1 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
1324 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
503 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.9
Supercell composite
3.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 040735
FFWSAT
TXC453-491-040930-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
134 AM CST FRI APR 4 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  330 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL TEXAS
 
   ...TRAVIS COUNTY...WILLIAMSON COUNTY
 
DOPPLER RADAR HAS ESTIMATED 1 TO 2 INCH PER HOUR RAINFALL OCCURRING OVER
WESTERN TRAVIS AND MOST OF WILLIAMSON COUNTIES FROM SHOWERS AND
THUNDERSTORMS MOVING NORTH NORTHEAST ALONG THE SLOPES OF THE
ESCARPMENT.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT.
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT ATTEMPT 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
Apr 3, 8:33 PM CSTFlash Flood WarningEWXDimmit42 min
Apr 3, 8:33 PM CSTSevere Thunderstorm WarningEWXDimmit42 min
Apr 3, 9:18 PM CSTSevere Thunderstorm WarningEWXMedina, Zavala57 min
Apr 3, 10:36 PM CSTFlash Flood WarningEWXGillespie69 min
Apr 3, 10:47 PM CSTFlash Flood WarningEWXKerr58 min
Apr 3, 11:10 PM CSTSevere Thunderstorm WarningEWXBexar65 min
Apr 3, 11:32 PM CSTSevere Thunderstorm WarningEWXComal58 min
Apr 3, 11:55 PM CSTSevere Thunderstorm WarningEWXHays65 min
Apr 4, 12:25 AM CSTFlash Flood WarningEWXWilliamson65 min
Apr 4, 12:25 AM CSTSevere Thunderstorm WarningEWXWilliamson65 min
Apr 4, 12:43 AM CSTSevere Thunderstorm WarningEWXHays62 min
Apr 4, 1:17 AM CSTFlash Flood WarningEWXDeWitt, Lavaca3 hr
Apr 4, 5:36 AM CSTFlash Flood WarningEWXLavaca3 hr
Apr 4, 6:23 AM CSTFlash Flood WarningEWXTravis, Williamson3 hr
Apr 4, 6:31 AM CSTFlash Flood WarningEWXBlanco3 hr
Apr 4, 6:43 AM CSTFlash Flood WarningEWXKendall3 hr
Apr 4, 9:24 AM CSTFlash Flood WarningEWXTravis, Williamson3 hr
Apr 4, 10:12 AM CSTFlash Flood WarningEWXDeWitt2 hr
Apr 4, 11:30 AM CSTSevere Thunderstorm WarningEWXVal Verde60 min
Apr 4, 2:34 PM CSTSevere Thunderstorm WarningEWXUvalde56 min
Apr 4, 2:40 PM CSTSevere Thunderstorm WarningEWXReal65 min
Apr 4, 3:00 PM CSTFlash Flood WarningEWXReal2 hr
Apr 4, 3:25 PM CSTFlash Flood WarningEWXBandera65 min
Apr 4, 3:25 PM CSTSevere Thunderstorm WarningEWXBandera65 min
Apr 4, 3:32 PM CSTFlash Flood WarningEWXUvalde58 min
Apr 4, 3:32 PM CSTSevere Thunderstorm WarningEWXUvalde58 min
Apr 4, 3:53 PM CSTFlash Flood WarningEWXKerr2 hr
Apr 4, 4:24 PM CSTFlash Flood WarningEWXBandera2 hr
Apr 4, 4:34 PM CSTSevere Thunderstorm WarningEWXMedina56 min
Apr 4, 5:11 PM CSTSevere Thunderstorm WarningEWXBexar, Kendall79 min

Nearby

Flash Flood Warnings in Texas, 1997Every flash flood warning in 1997

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.