Alert archive / Texas / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 83, NWS Austin/San Antonio, TX

May 12, 1994Atascosa County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 12, 1994, 1:58 PM CDT for Atascosa County, Texas. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
May 12, 1994, 1:58 PM CDT (18:58 UTC)
Expired
May 12, 1994, 3:00 PM CDT
In force
62 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Atascosa County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 7.0 hours before the alert went out and 231 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, Del Rio, TX at 12:00Z on 1994-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1258 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, Del Rio, TX at 12:00Z on 1994-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 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
1258 J/kg
Mixed-layer CIN
-149 J/kg
Mixed-layer LCL
776 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.7

Open this sounding in Storm Lab

The text

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

000 
WUUS1 KSAT 121859
SVREWX
TXC013-122000-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
158 PM CDT THU MAY 12 1994
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  300 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH TEXAS
 
   ...ATASCOSA COUNTY
 
AT 155 PM NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM
IN SOUTHERN ATASCOSA COUNTY MOVING NORTHWARD AT 10 MPH. THIS STORM IS
LIKELY PRODUCING HEAVY RAIN...GUSTY WINDS AND HAIL.
 
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 OCCUR WITH ANY THUNDERSTORM.  SEVERE THUNDERSTORMS CAN
AND OCCASIONALLY DO PRODUCE TORNADOS.
 
THIS IS A SLOW MOVING THUNDERSTORM AND IT MAY CAUSE FLOODING OF
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, May 12, 1:25 PM CDT, 33 minutes before
TXZ220-221-222-230-121930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
125 PM CDT THU MAY 12 1994

SHOWERS AND THUNDERSTORMS HAVE DEVELPED OVER ATASCOSA...KARNES AND
MCMULLEN COUNTIES THIS AFTERNOON.  THESE STORMS ARE FORMING ALONG A
SURFACE BOUNDARY NEAR THE SOUTHERN EDGES OF ATASCOSA AND KARNES
COUNTIES AND THE NORTHERN EDGE OF MCMULLEN COUNTY.  THE STORMS ARE
MOVING TO THE NORTH AT 10 MILES AN HOUR.

SOME OF THESE THUNDERSTORMS ARE PRODUCING VERY HEAVY RAIN.  CONTINUED
DEVELOPMENT IN THE SAME AREA IS LIKELY THROUGH THE AFTERNOON.
RESIDENTS IN THESE COUNTIES SHOULD BE ALERT TO CHANGING WEATHER
CONDITIONS.

STAY TUNED TO NOAA WEATHER RADIO...RADIO OR TELEVISION
FOR THE LATEST UPDATES CONCERNING THIS DEVELOPING WEATHER SITUATION.
Special weather statement, May 12, 1:28 PM CDT, 30 minutes before
TXZ220-221-222-230-121930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
125 PM CDT THU MAY 12 1994

SHOWERS AND THUNDERSTORMS HAVE DEVELPED OVER ATASCOSA...KARNES AND
MCMULLEN COUNTIES THIS AFTERNOON.  THESE STORMS ARE FORMING ALONG A
SURFACE BOUNDARY NEAR THE SOUTHERN EDGES OF ATASCOSA AND KARNES
COUNTIES AND THE NORTHERN EDGE OF MCMULLEN COUNTY.  THE STORMS ARE
MOVING TO THE NORTH AT 10 MILES AN HOUR.

SOME OF THESE THUNDERSTORMS ARE PRODUCING VERY HEAVY RAIN.  CONTINUED
DEVELOPMENT IN THE SAME AREA IS LIKELY THROUGH THE AFTERNOON.
RESIDENTS IN THESE COUNTIES SHOULD BE ALERT TO CHANGING WEATHER
CONDITIONS.

STAY TUNED TO NOAA WEATHER RADIO...RADIO OR TELEVISION
FOR THE LATEST UPDATES CONCERNING THIS DEVELOPING WEATHER SITUATION.

The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 1:11 PM CDTSevere Thunderstorm WarningEWXVictoria64 min
May 12, 1:20 PM CDTSevere Thunderstorm WarningEWXGoliad55 min
May 12, 4:02 PM CDTSevere Thunderstorm WarningEWXFrio, McMullen58 min
May 12, 5:53 PM CDTSevere Thunderstorm WarningEWXUvalde, Zavala67 min
May 12, 6:06 PM CDTSevere Thunderstorm WarningEWXAtascosa, Frio, La Salle69 min

Nearby

Severe Thunderstorm Warnings in Texas, 1994Every severe thunderstorm warning in 1994

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.