Alert archive / Texas / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 9, NWS Austin/San Antonio, TX

February 18, 1991Medina County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Feb 18, 1991, 10:04 PM CST for Medina County, Texas. It was in force for 71 min.

The area

The counties it named.

The facts

Issued
Feb 18, 1991, 10:04 PM CST (04:04 UTC)
Expired
Feb 18, 1991, 11:15 PM CST
In force
71 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Medina County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 4.1 hours before the alert went out and 250 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 1991-02-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 234 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 1991-02-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -42 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
234 J/kg
Mixed-layer CIN
-297 J/kg
Mixed-layer LCL
1564 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
-42 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Feb 18, 5:03 PM CST, 5 hours 1 minute before
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Special weather statement, Feb 18, 8:48 PM CST, 1 hour 16 minutes before
TXZ034>037-190500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
845 PM CST MON FEB 18 1991

...THUNDERSTORMS OVER CENTRAL TEXAS...

AT 840 PM AUSTIN RADAR INDICATED AN AREA OF MOSTLY SHOWERS WITH SOME
THUNDERSTORMS PRODUCING DANGEROUS LIGHTNING FROM NEAR WACO TO AUSTIN
TO NEAR SAN ANTONIO. MOVEMENT WAS TOWARDS THE NORTHEAST AT 30 MPH.

THERE HAS BEEN NO SEVERE WEATHER REPORTED WITHIN THIS AREA TO THE
AUSTIN WEATHER SERVICE.
Special weather statement, Feb 18, 9:03 PM CST, 1 hour 1 minute before
TXZ034>037-190500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
9 PM CST MON FEB 18 1991

...THUNDERSTORMS OVER CENTRAL TEXAS...SOME PRODUCING MARBLE SIZE HAIL...

AT 855 PM AUSTIN RADAR INDICATED AN AREA OF MOSTLY SHOWERS WITH SOME
THUNDERSTORMS PRODUCING DANGEROUS LIGHTNING FROM NEAR WACO TO AUSTIN
TO NEAR SAN ANTONIO. MOVEMENT WAS TOWARDS THE NORTHEAST AT 30 MPH.

JUST BEFORE 9 PM MARBLE SIZE HAIL WAS REPORTED FROM LAKEWAY OUT BY
LAKE TRAVIS.

THERE HAS BEEN NO SEVERE WEATHER REPORTED WITHIN THIS AREA TO THE
AUSTIN WEATHER SERVICE.
Special weather statement, Feb 18, 9:26 PM CST, 38 minutes before
TXZ034>037-190500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
920 PM CST MON FEB 18 1991

...TORNADO WATCH IN EFFECT UNTILL 4 AM TUESDAY FOR EASTERN TEXAS...THIS
WATCH INCLUDES BURLESON AND MILAM COUNTIES OF SOUTH CENTRAL TEXAS.

AT 915 PM AUSTIN RADAR INDICATED AN AREA OF MOSTLY SHOWERS WITH SOME
THUNDERSTORMS PRODUCING DANGEROUS LIGHTNING AND SMALL HAIL FROM NEAR WACO
TO AUSTIN TO NEAR SAN ANTONIO. MOVEMENT WAS TOWARDS THE NORTHEAST AT 30 MPH.

AROUND 9 PM REPORTS OF PEA TO MARBLE SIZE HAIL WERE RECEIVED FROM LEANDER
AND LAKEWAY AND ALSO NEAR 183 AND 620 ALONG WITH HEAVY DOWNPOURS OF
RAIN AND DANGEROUS LIGHTNING.

THERE HAS BEEN NO SEVERE WEATHER REPORTED TO THE AUSTIN3 WEATHER SEVICE
OFFICE.
PJL
Special weather statement, Feb 18, 10:01 PM CST, 3 minutes before
TXZ034-035-038-039-190800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1000 PM CST MON FEB 18 1991

...THUNDERSTORMS MOVING TOWARD SAN ANTONIO...

AT 945 PM CST...WEATHER SERVICE RADARS INDICATED AN AREA OF SHOWERS
AND THUNDERSTORMS...A FEW WITH HEAVY RAIN...FROM EAGLE PASS TO AUSTIN.

THE HEAVIEST STORMS WERE LOCATED IN MAVERICK AND ZAVALA COUNTIES...WITH
MOVEMENT TOWARD THE NORTHEAST AT 25 MILES AN HOUR.  HONDO WEATHER RADAR
INDICATED THE STORMS IN MAVERICK AND ZAVALA COUNTIES CONTAIN SMALL HAIL.
THESE STORMS ARE MOVING INTO MEDINA COUNTY AND WILL AFFECT HONDO AND THE
SURROUNDING AREA WITHIN THE HOUR.

THE AREA OF THUNDERSTORMS WILL EVENTUALLY MOVE INTO BEXAR AND SURROUNDING
COUNTIES WITHIN AN HOUR OR TWO...AND AFFECT THE SAN ANTONIO METROPOLITAN
AREA THE REST OF THIS MONDAY EVENING AND EARLY TUESDAY MORNING.  BESIDES
THE THREAT OF SMALL HAIL...THERE EXISTS THE POSSIBILITY FOR GUSTY WINDS
AND FREQUENT LIGHTNUING.

ADDITIONAL STATEMENTS OR BULLETINS WILL BE ISSUED AS CONDITIONS
WARRANT...SO RESIDENTS IN SOUTH CENTRAL TEXAS AND ADJOINING AREAS
SHOULD STAY TUNED FOR LATER UPDATES.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 18, 10:16 PM CSTSevere Thunderstorm WarningEWXMedina59 min
Feb 18, 10:16 PM CSTSevere Thunderstorm WarningEWXZavala59 min
Feb 18, 11:15 PM CSTSevere Thunderstorm WarningEWXBexar60 min
Feb 18, 11:30 PM CSTSevere Thunderstorm WarningEWXGonzales, Guadalupe, Wilson60 min
Feb 18, 11:30 PM CSTSevere Thunderstorm WarningEWXAtascosa60 min
Feb 19, 12:23 AM CSTSevere Thunderstorm WarningEWXGonzales, Karnes, Wilson67 min

Nearby

Severe Thunderstorm Warnings in Texas, 1991Every severe thunderstorm warning in 1991

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.