Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 54, NWS Austin/San Antonio, TX

April 26, 1997Williamson County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 26, 1997, 5:43 AM CDT for Williamson County, Texas. It was in force for 3 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 26, 1997, 5:43 AM CDT (10:43 UTC)
Expired: Apr 26, 1997, 8:45 AM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Williamson County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 10.7 hours before the alert went out and 245 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 553 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 261045
FFWSAT
TXC491-261345-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
543 AM CDT SAT APR 26 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  845 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...WILLIAMSON COUNTY
 
AT 540 AM THUNDERSTORMS WITH VERY HEAVY RAINFALL WERE NOTED OVER
WILLIAMSON COUNTY WITH ADDITIONAL HEAVY RAINS HEADED TOWARD THE COUNTY
FROM THE SOUTH.  RAINFALL ESTIMATES OF 1 TO 2 INCHES HAVE FALLEN WITH A
TOTAL OF 2 TO 4 INCHES LIKELY.
 
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS OBSERVED
ACT QUICKLY.  MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
 
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.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Apr 25, 11:59 PM CDT, 5 hours 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TEXAS
1158 PM CDT FRI APR 25 1997

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION..|..
 1150 PM    LEAKEY                    TX   1.75 INCH HAIL
04/25/97   REAL                           18N AT PRADE RANCH

Local storm report, Apr 26, 12:01 AM CDT, 5 hours 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TEXAS
1158 PM CDT FRI APR 25 1997

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....
1050 PM    LEAKEY                    TX   1.75 INCH HAIL
04/25/97   REAL                           18N AT PRADE RANCH

Local storm report, Apr 26, 1:00 AM CDT, 4 hours 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TEXAS
100 AM CDT SAT APR 26 1997

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....
1245 AM    UVALDE                    TX   1.75 INCH HAIL
04/26/97   UVALDE                         BETWEEN UVALDE AND KNIPPA

1225 AM    EAGLE PASS                TX   0.75 INCH HAIL
4/26/97    MAVERICK                       0.5 INCH HAIL 1 FT DEEP

Local storm report, Apr 26, 1:01 AM CDT, 4 hours 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TEXAS
100 AM CDT SAT APR 26 1997

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....
1245 AM    UVALDE                    TX   1.75 INCH HAIL
04/26/97   UVALDE                         BETWEEN UVALDE AND KNIPPA

1225 AM    EAGLE PASS                TX   0.75 INCH HAIL
4/26/97    MAVERICK                       0.5 INCH HAIL 1 FT DHEEP

Special weather statement, Apr 26, 5:25 AM CDT, 18 minutes before

TXZ171>173-183>194-202>209-217>225-228-262300-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
525 AM CDT SAT APR 26 1997

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH
FOR A PORTION OF SOUTH CENTRAL TEXAS.  THIS WATCH INCLUDES THE
FOLLOWING COUNTIES:  KARNES...LAVACA...FAYETTE...GONZALES AND DEWITT.

THE SEVERE THUNDERSTORM WATCH EXPIRES AT 10 AM...

A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE
THUNDERSTORMS WHICH CAN PRODUCE WINDS IN EXCESS OF 60 MPH AND HAIL
3/4 INCHES OR LARGER.

...FLASH FLOOD WATCH TODAY AND TONIGHT EAST OF A LINE FROM PEARSALL
TO HONDO... BANDERA... KERRVILLE... AND LLANO... INCLUDING THE CITIES
OF AUSTIN... SAN ANTONIO AND AREAS SOUTH AND EAST.

AS A MAJOR STORM SYSTEM CONTINUES TO MOVE EAST ACROSS NORTHERN MEXICO
TOWARD SOUTH TEXAS CONDITIONS WILL REMAIN FAVORABLE FOR HEAVY RAIN.
NUMEROUS SHOWERS AND THUNDERSTORMS THROUGH TODAY AND TONIGHT WILL
PRODUCE A GENERAL 1 TO 2 INCH RAINFALL WITH STRONGEST STORMS
PRODUCING 3 INCHES OR MORE RAIN IN A SHORT PERIOD OF TIME.

THIS MORNING...HEAVY RAIN AND FLOODING WAS ONGOING NORTH AND EAST OF
SAN ANTONIO AS NUMEROUS SHOWERS AND THUNDERSTORMS MERGED TO FORM A
BROAD AREA OF HEAVY RAIN.

DURING THE AFTERNOON...TEMPERATURES WILL CLIMB INTO THE 70S AND 80S
ACROSS DEEP SOUTH TEXAS AND MORE THUNDERSTORMS COULD DEVELOP AND MOVE
NORTH INTO SOUTH CENTRAL AND EAST TEXAS.

TONIGHT...HEAVY RAIN ALONG THE TEXAS COAST COULD SPREAD NORTH AND
WEST INTO SOUTH CENTRAL TEXAS AND THE HILL COUNTRY.

RESIDENTS OF SOUTH CENTRAL TEXAS SHOULD CONTINUE TO MONITOR THE
LATEST FORECASTS AND ADVISORIES.  THIS IS A POWERFUL STORM SYSTEM
PRODUCING RAPID WEATHER CHANGES.  BE PREPARED TO MOVE TO A PLACE OF
SAFETY IF SEVERE WEATHER IS SIGHTED OR A WATCH OR WARNING IS ISSUED.

THE NATIONAL WEATHER SERVICE WILL ADVISE YOU OF THE VERY LATEST
DEVELOPING SEVERE WEATHER POTENTIAL VIA NOAA WEATHER RADIO... LOCAL
TV... CABLE TV... RADIO... AND OUR INTERNET WEBSITE LOCATED AT
WWW.SRH.NOAA.GOV.EWX

THE HAZARDOUS WEATHER OUTLOOK WILL NORMALLY BE UPDATED BY MEANS OF
THE ZONE FORECAST...SHORT TERM FORECASTS...WATCHES...WARNINGS AND
ADVISORIES.  THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED
ONLY IF UNFORECAST HAZARDOUS WEATHER DEVELOPS OR IF FORECAST
HAZARDOUS WEATHER IS NO LONGER EXPECTED.

Special weather statement, Apr 26, 5:27 AM CDT, 16 minutes before

TXZ171>173-183>194-202>209-217>225-228-262300-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
525 AM CDT SAT APR 26 1997

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH
FOR A PORTION OF SOUTH CENTRAL TEXAS.  THIS WATCH INCLUDES THE
FOLLOWING COUNTIES:  KARNES...LAVACA...FAYETTE...GONZALES AND DEWITT.

THE SEVERE THUNDERSTORM WATCH EXPIRES AT 10 AM...

A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE
THUNDERSTORMS WHICH CAN PRODUCE WINDS IN EXCESS OF 60 MPH AND HAIL
3/4 INCHES OR LARGER.

...FLASH FLOOD WATCH TODAY AND TONIGHT EAST OF A LINE FROM PEARSALL
TO HONDO... BANDERA... KERRVILLE... AND LLANO... INCLUDING THE CITIES
OF AUSTIN... SAN ANTONIO AND AREAS SOUTH AND EAST.

AS A MAJOR STORM SYSTEM CONTINUES TO MOVE EAST ACROSS NORTHERN MEXICO
TOWARD SOUTH TEXAS CONDITIONS WILL REMAIN FAVORABLE FOR HEAVY RAIN.
NUMEROUS SHOWERS AND THUNDERSTORMS THROUGH TODAY AND TONIGHT WILL
PRODUCE A GENERAL 1 TO 2 INCH RAINFALL WITH STRONGEST STORMS
PRODUCING 3 INCHES OR MORE RAIN IN A SHORT PERIOD OF TIME.

THIS MORNING...HEAVY RAIN AND FLOODING WAS ONGOING NORTH AND EAST OF
SAN ANTONIO AS NUMEROUS SHOWERS AND THUNDERSTORMS MERGED TO FORM A
BROAD AREA OF HEAVY RAIN.

DURING THE AFTERNOON...TEMPERATURES WILL CLIMB INTO THE 70S AND 80S
ACROSS DEEP SOUTH TEXAS AND MORE THUNDERSTORMS COULD DEVELOP AND MOVE
NORTH INTO SOUTH CENTRAL AND EAST TEXAS.

TONIGHT...HEAVY RAIN ALONG THE TEXAS COAST COULD SPREAD NORTH AND
WEST INTO SOUTH CENTRAL TEXAS AND THE HILL COUNTRY.

RESIDENTS OF SOUTH CENTRAL TEXAS SHOULD CONTINUE TO MONITOR THE
LATEST FORECASTS AND ADVISORIES.  THIS IS A POWERFUL STORM SYSTEM
PRODUCING RAPID WEATHER CHANGES.  BE PREPARED TO MOVE TO A PLACE OF
SAFETY IF SEVERE WEATHER IS SIGHTED OR A WATCH OR WARNING IS ISSUED.

THE NATIONAL WEATHER SERVICE WILL ADVISE YOU OF THE VERY LATEST
DEVELOPING SEVERE WEATHER POTENTIAL VIA NOAA WEATHER RADIO... LOCAL
TV... CABLE TV... RADIO... AND OUR INTERNET WEBSITE LOCATED AT
WWW.SRH.NOAA.GOV.EWX

THE HAZARDOUS WEATHER OUTLOOK WILL NORMALLY BE UPDATED BY MEANS OF
THE ZONE FORECAST...SHORT TERM FORECASTS...WATCHES...WARNINGS AND
ADVISORIES.  THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED
ONLY IF UNFORECAST HAZARDOUS WEATHER DEVELOPS OR IF FORECAST
HAZARDOUS WEATHER IS NO LONGER EXPECTED.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 9:56 PM CDT	Flash Flood Warning	EWX	Val Verde	3 hr
Apr 25, 11:04 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Real	56 min
Apr 25, 11:11 PM CDT	Severe Thunderstorm Warning	EWX	Maverick	2 hr
Apr 25, 11:50 PM CDT	Flash Flood Warning	EWX	Uvalde	115 min
Apr 25, 11:50 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde	115 min
Apr 25, 11:54 PM CDT	Severe Thunderstorm Warning	EWX	Kerr	66 min
Apr 26, 12:53 AM CDT	Flash Flood Warning	EWX	Bandera	2 hr
Apr 26, 1:11 AM CDT	Flash Flood Warning	EWX	Dimmit	2 hr
Apr 26, 1:11 AM CDT	Severe Thunderstorm Warning	EWX	Dimmit	2 hr
Apr 26, 1:25 AM CDT	Flash Flood Warning	EWX	Gillespie, Kerr	65 min
Apr 26, 1:25 AM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kerr	65 min
Apr 26, 2:55 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa	65 min
Apr 26, 3:12 AM CDT	Flash Flood Warning	EWX	Bandera	3 hr
Apr 26, 5:03 AM CDT	Flash Flood Warning	EWX	Hays, Travis	3 hr

Nearby

Flash Flood Warnings in Texas, 1997 Every 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.