Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 27, NWS Austin/San Antonio, TX

April 4, 1997DeWitt County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 4, 1997, 10:12 AM CST for DeWitt County, Texas. It was in force for 2 hr. 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, 10:12 AM CST (16:12 UTC)
Expired
Apr 4, 1997, 12:15 PM CST
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County DeWitt County, TX

The radar

The Austin/San Antonio radar (KEWX), 95 km from the middle of the area, began a volume at 16:12 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 4.2 hours before the alert went out and 150 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 1997-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 714 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 1997-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 174 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
714 J/kg
Mixed-layer CIN
-179 J/kg
Mixed-layer LCL
920 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
174 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.1
Supercell composite
3.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 041614
FFWSAT
TXC123-041815-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1012 AM CST FRI APR 4 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1215 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...DE WITT COUNTY
 
RADAR INDICATED VERY HEAVY RAINS OF BETWEEN 1 AND 2 INCHES AN HOUR WERE
OCCURRING NORTH OF LINE FROM YORKTOWN TO CUERO TO YOAKUM. STRONG
THUNDERSTOMS WITH HEAVY RAIN WERE WIDESPREAD OVER THE COUNTY AND ANY
ADDITIONAL RAINFALL WILL CAUSE A RAPID RISE IN STREAMS AND CREAKS AS WEL
AS LOW WATER CROSSINGS. MOTORISTS DRIVING IN DE WITT COUNTY...
ESPECIALLY HIGHWAYS 87...183...AND 77A SHOULD USE EXTREME CAUTION OR
AVOID DRIVING. THE HEAVY RAIN WILL LIKELY CONTINUE FOR THE NEXT HOUR.
 
AVOID ALREADY FLOODED AREAS.  TRAVELERS SHOULD NOT ATTEMPT TO
CROSS FLOODED ROADS.  IF YOUR VEHICLE STALLS...LEAVE IT AND MOVE
IMMEDIATELY TO HIGHER GROUND IF YOU CAN DO SO SAFELY.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT.  IT IS
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS.  CAMPERS AND OTHER
PEOPLE IN RECREATION AREAS ALONG CREEKS...STREAMS...AND RIVERS IN
THE WARNING AREA SHOULD MOVE TO HIGH GROUND IMMEDIATELY.
 
FLOOD PRONE URBAN AREAS FILL WITH WATER QUICKLY.  CLOGGED STORM
DRAINS MAY CAUSE OTHER AREAS TO FLOOD.  DO NOT DRIVE THROUGH
FLOOD WATERS AND STAY AWAY FROM STORM DRAINS.

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, 1:34 AM CSTFlash Flood WarningEWXTravis, Williamson116 min
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, 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; radar from the NEXRAD Level II archive.