Alert archive / Texas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 181, NWS Austin/San Antonio, TX

December 23, 1997Medina County, Zavala County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Dec 23, 1997, 1:36 PM CST for Medina County, Zavala County, Texas. It was in force for 69 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 23, 1997, 1:36 PM CST (19:36 UTC)
Expired
Dec 23, 1997, 2:45 PM CST
In force
69 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Medina County, TX, Zavala County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 7.6 hours before the alert went out and 139 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 1997-12-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 13 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 1997-12-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 285 square meters per square second.1939587897117136Sfc1 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
13 J/kg
Mixed-layer CIN
-253 J/kg
Mixed-layer LCL
579 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
285 m²/s²
0-3 km storm-relative helicity
389 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 231936 RRA
SVRSAT
TXC325-507-232045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
136 PM CST TUE DEC 23 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  245 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL TEXAS
 
   ...MEDINA COUNTY...EASTERN ZAVALA COUNTY
 
AT 130 PM NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM
WITH POSSIBLE LARGE HAIL MOVING INTO NORTHEASTERN ZAVALA COUNTY NEAR
BATESVILLE. THIS STORM WAS MOVIG NORTHEAST AT 50 MPH. IT WILL BE MOVING
RAPIDLY INTO MEDINA COUNTY IN THE NEXT 10 MINUTES.
 
 
SEVERE THUNDERSTORM WINDS CAN REACH SPEEDS OVER 60 MPH.  THESE WINDS
BLOW DOWN TREES...POWER LINES...AND SEVERELY DAMAGE MOBILE HOMES...
SOMETIMES BUILDINGS.  VERY LARGE HAIL CAN INJURE ANYONE CAUGHT
OUTSIDE.

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 23, 1:44 PM CSTSevere Thunderstorm WarningEWXKendall, Kerr61 min
Dec 23, 2:23 PM CSTSevere Thunderstorm WarningEWXBandera, Bexar37 min
Dec 23, 2:51 PM CSTSevere Thunderstorm WarningEWXDeWitt39 min

Nearby

Severe Thunderstorm Warnings in Texas, 1997Every 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; the sounding from the Mesonet's radiosonde archive.