Alert archive / Texas / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 25, NWS Austin/San Antonio, TX

April 12, 1986DeWitt County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 12, 1986, 4:45 PM CST for DeWitt County, Texas. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Apr 12, 1986, 4:45 PM CST (22:45 UTC)
Expired
Apr 12, 1986, 5:45 PM CST
In force
60 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County DeWitt County, TX

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Victoria Regiona, TX (KVCT), launched 12:00Z, 10.8 hours before the alert went out and 51 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, Victoria Regiona, TX at 12:00Z on 1986-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 671 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, Victoria Regiona, TX at 12:00Z on 1986-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 123 square meters per square second.1939587897Sfc1 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
671 J/kg
Mixed-layer CIN
-255 J/kg
Mixed-layer LCL
583 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
123 m²/s²
0-3 km storm-relative helicity
148 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KVCT 122245
SVRVCT
TXC123-122340-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE VICTORIA TX
445 PM CST SAT APR 12 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 545 PM CST FOR PERSONS IN DE WITT COUNTY IN SOUTH
CENTRAL TEXAS.

AT 440 PM RADAR INDICATED A SEVERE THUNDERSTORM IN EASTERN WILSON
COUNTY MOVING SOUTHEAST AT 20 MILES AN HOUR.

LARGE HAIL..DAMAGING THUNDERSTORM WXINDS..FREQUENT DANGEROUS LIGHTNING..
AND HEAVY RAIN WILL ACCOMPANY THIS THUNDERSTORM IN THE NEXT HOUR.

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 12, 4:15 PM CST, 30 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
415 PM CST SAT APR 12 1986

AT 410 PM THE NATIONAL WEATHER SERVICE RADAR IN HONDO..TEXAS INDICATED
A THUNDERSTORM 20 MILES EAST OF SAN ANTONIO NEAR LA VERNIA MOVING
TOWARD THE SOUTHEAST AT 20 MILES AN HOUR.

THIS THUNDERSTORM WILL MOVE OVER SOUTHERN PARTS OF GUADALUPE COUNTY AND
NORTHERN PARTS OF WILSON COUNTY IN THE NEXT HOUR.

PERIODS OF HEAVY RAIN..FREQUENT LIGHTNING..G1USTY WINDS..AND POSSIBLE
SMALL HAIL WILL OCCUR WITH THIS THUNDERSTORM.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 12, 4:40 PM CSTSevere Thunderstorm WarningEWXGonzales, Wilson60 min
Apr 12, 4:45 PM CSTSevere Thunderstorm WarningEWXKarnes55 min
Apr 12, 5:35 PM CSTSevere Thunderstorm WarningEWXDeWitt, Goliad70 min

Nearby

Severe Thunderstorm Warnings in Texas, 1986Every severe thunderstorm warning in 1986

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.