Alert archive / Texas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 51, NWS Austin/San Antonio, TX

April 25, 1997Burnet County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 25, 1997, 11:17 AM CDT for Burnet County, Texas. It was in force for 58 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Apr 25, 1997, 11:17 AM CDT (16:17 UTC)
Expired: Apr 25, 1997, 12:15 PM CDT
In force: 58 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Burnet County, TX

What was reported inside it

Time	Report	Where	Remark
Apr 25, 11:45 AM CDT	Thunderstorm Wind	Granite Mtn, TX	Roof damage reported to several locations due to severe winds.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 4.3 hours before the alert went out and 242 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1100 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 186 m²/s²
0-3 km storm-relative helicity: 320 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.

555 
WUUS1 KSAT 251619 RRA
SVRSAT
TXC053-251715-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1117 AM CDT FRI APR 25 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1215 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...BURNET COUNTY
 
AT 1115 AM NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM NEAR LAKE LBJ MOVING TO THE NORTHEAST AT 20 TO 25 MPH.
THIS STORM WILL MOVE ACROSS GRANITE SHOALS
AND MARBLE FALLS BETWEEN 1120 AND 1145.
 
THUNDERSTORMS NORTH OF THIS SEVERE STORM WILL MOVE ACROSS THE CITY OF
BURNET BETWEEN 1130 AND 1145.
 
PEOPLE IN THE PATH OF THIS STORM SHOULD BE ALERT TO THE POSSIBILITY
OF LARGE HAIL AND DAMAGING WINDS.  FREQUENT LIGHTNING AND LOCALLY
HEAVY RAIN CAN ALSO OCCUR WITH SEVERE THUNDERSTORMS...FLOODING SMALL
STREAMS...LOW AREAS...AND LOW WATER CROSSINGS.
 
 
 
&

What forecasters said that day

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

In the hours before

Special weather statement, Apr 25, 5:39 AM CDT, 5 hours 38 minutes before

TXZ171>173-183>194-202>209-217>225-228-252300-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
530 AM CDT FRI APR 25 1997

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS PRODUCING LARGE
HAIL... DAMAGING WINDS AND ISOLATED TORNADOES TODAY AND TONIGHT
ACROSS ALL OF SOUTH CENTRAL TEXAS AND THE HILL COUNTRY.

AS A MAJOR STORM SYSTEM CONTINUES TO ORGANIZE OVER WEST TEXAS AND
MOVE SLOWLY SOUTH INTO MEXICO AND THE RIO GRANDE CONDITIONS WILL
BECOME INCREASINGLY FAVORABLE FOR SEVERE WEATHER AND LOCALLY HEAVY
RAINFALL TODAY AND TONIGHT.  A NUMEROUS SHOWERS AND THUNDERSTORMS
THROUGH THE PERIOD WILL PRODUCE A GENERAL 1 TO 2 INCH RAINFALL WITH
STRONGEST STORMS PRODUCING 3 INCHES OF RAIN IN A SHORT PERIOD OF
TIME.

THIS MORNING...SEVERE WEATHER WAS ONGOING OVER SOUTHWEST TEXAS.  AS
THE DEEP LOW PRESSURE SYSTEM NEAR SANDERSON MOVES SOUTH INTO
NORTHEAST MEXICO THIS MORNING...STRONG AND POSSIBLY SEVERE
THUNDERSTORMS WILL EFFECT WESTERN PORTIONS OF THE EDWARDS PLATEAU.

DURING THE AFTERNOON...TEMPERATURES WILL CLIMB INTO THE 70S AND GULF
MOISTURE WILL INCREASE AREA-WIDE IMPROVING THE RISK OF SEVERE WEATHER
ACROSS ALL OF SOUTH CENTRAL TEXAS AND THE HILL COUNTRY.  STORMS WILL
LIKELY DEVELOP OVER THE SIERRA MADRE IN MEXICO... RIO GRANDE PLAINS
OR THE HILL COUNTRY AND MOVE RAPIDLY NORTHEAST ACROSS THE AREA.

TONIGHT...THE SEVERE WEATHER PATTERN MAY EVOLVE INTO A HEAVY RAIN
EVENT.  A SLOW MOVING COLD FRONT WILL BE APPROACHING THE HILL COUNTRY
AND COULD ACT AS A FOCUS FOR ADDITIONAL HEAVY RAIN.  A FLASH FLOOD
WATCH MAY BE REQUIRED ACROSS SOME AREAS OF SOUTH TEXAS AND THE HILL
COUNTRY TONIGHT.

THE DANGER OF NIGHTTIME HEAVY RAIN EVENTS CANNOT BE OVERSTATED.
SINCE OCTOBER 1996...4 SOUTH TEXANS HAVE PERISHED IN AUTOMOBILES
DIRECTLY RELATED TO FLASH FLOODING.  ALL OF THE FATALITIES OCCURRED
WHEN AUTOMOBILES WERE SWEPT FROM THE ROADWAY BY RAGING FLOOD WATERS
IN THE DARKNESS OF NIGHT.

RESIDENTS OF SOUTH CENTRAL TEXAS...INCLUDING THE EDWARDS PLATEAU AND
HILL COUNTRY...SHOULD MONITOR THE LATEST FORECASTS AND ADVISORIES.
THIS IS A POWERFUL STORM SYSTEM PRODUCING RAPID CHANGES IN THE
WEATHER.  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, 8:33 AM CDT	Flash Flood Warning	EWX	Val Verde	117 min
Apr 25, 10:20 AM CDT	Flash Flood Warning	EWX	Edwards	115 min
Apr 25, 11:11 AM CDT	Severe Thunderstorm Warning	EWX	Blanco	64 min
Apr 25, 11:52 AM CDT	Flash Flood Warning	EWX	Blanco, Burnet, Llano	4 hr
Apr 25, 1:10 PM CDT	Flash Flood Warning	EWX	Gillespie	6 hr
Apr 25, 1:53 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell	67 min
Apr 25, 2:30 PM CDT	Severe Thunderstorm Warning	EWX	Bexar	60 min
Apr 25, 2:41 PM CDT	Flash Flood Warning	EWX	Bastrop, Caldwell	4 hr
Apr 25, 2:47 PM CDT	Flash Flood Warning	EWX	Travis, Williamson	4 hr
Apr 25, 3:24 PM CDT	Flash Flood Warning	EWX	Fayette	4 hr
Apr 25, 3:59 PM CDT	Flash Flood Warning	EWX	Gonzales	3 hr
Apr 25, 5:16 PM CDT	Flash Flood Warning	EWX	Lavaca	3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 1997 Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.