Alert archive / Texas / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 73, NWS Austin/San Antonio, TX

April 20, 1995Hays County, Travis County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 20, 1995, 12:15 AM CDT for Hays County, Travis County, Texas. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Apr 20, 1995, 12:15 AM CDT (05:15 UTC)
Expired
Apr 20, 1995, 1:15 AM CDT
In force
60 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Hays County, TX, Travis County, TX

The radar

The Austin/San Antonio radar (KEWX), 56 km from the middle of the area, began a volume at 05:17 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 00:00Z, 5.3 hours before the alert went out and 280 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 1995-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2397 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 1995-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.1939587897117Sfc1 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
2397 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
849 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
85 m²/s²
Significant tornado parameter
1.2
Supercell composite
4.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 200515
SVRSAT
TXC209-453-200615-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1215 AM CDT THU APR 20 1995
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  115 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL TEXAS
 
   ...HAYS COUNTY...TRAVIS COUNTY
 
NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED A SEVERE THUNDERSTORM OVER
WESTERN TRAVIS APPROACHING THE WEASTERN PART OF THE CITY OF AUSTIN.
ANOTHER SEVERE THUNDERSTORM WAS LOCATED IN WESTERN HAYS COUNTY NEAR
HENLY.
 
MOVEMENT OF THE STORMS WAS TOWARD THE EAST AND NORTHEAST AT 30 MPH.
 
THESE STORMS WILL AFFECT THE CITY OF AUSTIN AND SAN MARCOS BETWEEN 1220
AND 1 AM.
 
ALTHOUGH NO TORNADOES HAVE BEEN DETECTED WITH THIS STORM...A
TORNADO WATCH REMAINS IN EFFECT.  SEVERE THUNDERSTORMS CAN AND
OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO AFDVANCE WARNING
SO BE ON THE LOOKOUT.

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 19, 10:02 PM CDT, 2 hours 13 minutes before
TXZ171>173-188-190>193-200500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
10 PM CDT WED APR 19 1995

...TORNADO WATCH IN EFFECT UNTIL 2 AM CDT FOR NORTHERN PORTIONS OF
SOUTH CENTRAL TEXAS...

...SEVERE THUNDERSTORM WARNINGS ARE IN EFFECT UNTIL 1030 PM FOR
BURNET COUNTY...AND UNTIL 1015 PM FOR LLANO COUNTY...

STRONG THUNDERSTORMS CONTINUE TO DEVELOP ACROSS LLANO...GILESPIE
AND BURNET COUNTIES.  THESE STORMS HAVE PRODUCED LARGE HAIL AND
DAMAGING WINDS.   THE STORMS WERE MOVING EAST AT 30 MILES AN HOUR
AN SHOULD MOVE INTO WILLIAMSON COUNTY WITHIN THE NEXT 30 MINUTES.

PERSONS IN AND NEAR THE WATCH AREA SHOULD REMAIN ALERT TO CHANGING
WEATHER CONDITIONS AND BE fREADY TO MOVE TO A PLACE OF SAFETY IF A
WARNING IS ISSUED OR THREATENING WEATHER IS SIGHTED.
Special weather statement, Apr 19, 10:26 PM CDT, 1 hour 49 minutes before
TXZ171>173-186>194-204>209-223-200430-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1030 PM CDT WED APR 19 1995

...SEVERE THUNDERSTORM WARNING FOR LLANO COUNTY HAS EXPIRED...

...SEVERE THUNDERSTORM WARNING FOR BURNET COUNTY HAS EXPIRED...

...A TORNADO WATCH REMAINS IN EFFECT FOR PARTS OF SOUTH CENTRAL TEXAS
AND THE HILL COUNTRY UNTIL 2 AM CDT...

AT 1025 PM THE SEVERE THUNDERSTORM OVER LLANO COUNTY HAS MOVED EAST
INTO BURNET COUNTY AND WEAKENED.  HOWEVER THUNDERSTORMS HAVE
DEVELOPED ALONG A LINE FROM WEST OF BANDERA TO KERRVILLE TO
FREDERICKSBURG...AND CONTINUE OVER PARTS OF LLANO AND BURNET COUNTIES.
THESE STORMS COULD INTENSIFY VERY QUICKLY AND BECOME SEVERE AS
THE DRY LINE MOVES EASTWARD INTO VERY UNSTABLE AIR OVER THE REGION.

NATIONAL WEATHER SERVICE DOPPLE RADAR CONTINUES TO MONITOR THESE
STORMS...AND ADDITIONAL STATEMENTS AND OR WARNINGS WILL BE ISSUED
THROUGHOUT THIS SEVERE WEATHER EVENT.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 9:16 PM CDTSevere Thunderstorm WarningEWXLlano59 min
Apr 19, 9:21 PM CDTSevere Thunderstorm WarningEWXBurnet69 min
Apr 19, 10:34 PM CDTSevere Thunderstorm WarningEWXKerr56 min
Apr 19, 10:46 PM CDTSevere Thunderstorm WarningEWXGillespie44 min
Apr 19, 11:04 PM CDTTornado WarningEWXBlanco, Gillespie56 min
Apr 19, 11:20 PM CDTSevere Thunderstorm WarningEWXWilliamson55 min
Apr 20, 12:50 AM CDTSevere Thunderstorm WarningEWXWilliamson40 min
Apr 20, 2:51 AM CDTSevere Thunderstorm WarningEWXBastrop39 min
Apr 20, 6:31 AM CDTSevere Thunderstorm WarningEWXBlanco44 min
Apr 20, 7:11 AM CDTSevere Thunderstorm WarningEWXTravis, Williamson49 min

Nearby

Severe Thunderstorm Warnings in Texas, 1995Every severe thunderstorm warning in 1995

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.