Alert archive / Texas / Tornado Warnings in 1991

Tornado Warning 21, NWS Austin/San Antonio, TX

October 29, 1991Atascosa County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at Oct 29, 1991, 3:03 PM CST for Atascosa County, Texas. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Oct 29, 1991, 3:03 PM CST (21:03 UTC)
Expired
Oct 29, 1991, 3:45 PM CST
In force
42 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Atascosa County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 9.1 hours before the alert went out and 174 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 12:00Z on 1991-10-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3681 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 12:00Z on 1991-10-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 square meters per square second.193958Sfc1 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
3681 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
568 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
2.0
Supercell composite
11.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 292105
TORSAT
TXC013-292145-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
303 PM CST TUE OCT 29 1991
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  345 PM CST
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH TEXAS
          ...ATASCOSA
 
RADAR INDICATES A POSSIBLE TORNADO IN SOUTHWEST ATASCOSA COUNTY NEAR
THE LASALLE MCMULLEN COUNTY BORDER.  INDICATIONS ARE THAT THIS STORM
IS MOVING TO THE EAST AT AROUND 15 MPH.
 
IF YOU ARE IN THE PATH OF THIS STORM...GO TO A BASEMENT SHELTER OR A
CENTRAL INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUILDING.
ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING.
 
THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 29, 10:13 AM CSTFlash Flood WarningEWXReal3 hr
Oct 29, 11:13 AM CSTFlash Flood WarningEWXKerr3 hr
Oct 29, 1:52 PM CSTSevere Thunderstorm WarningEWXFrio53 min
Oct 29, 2:05 PM CSTSevere Thunderstorm WarningEWXMedina40 min
Oct 29, 2:13 PM CSTSevere Thunderstorm WarningEWXBexar62 min
Oct 29, 2:27 PM CSTSevere Thunderstorm WarningEWXAtascosa63 min
Oct 29, 2:42 PM CSTSevere Thunderstorm WarningEWXFrio33 min
Oct 29, 3:31 PM CSTSevere Thunderstorm WarningEWXMcMullen59 min

Nearby

Tornado Warnings in Texas, 1991Every tornado warning in 1991Tornadoes 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.