Alert archive / Texas / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 79, NWS Austin/San Antonio, TX

September 1, 1990Bexar County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Sep 1, 1990, 1:29 PM CDT for Bexar County, Texas. It was in force for 46 min.

The area

The counties it named.

The facts

Issued
Sep 1, 1990, 1:29 PM CDT (18:29 UTC)
Expired
Sep 1, 1990, 2:15 PM CDT
In force
46 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Bexar 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

Corpus Christi, TX (KCRP), launched 12:00Z, 6.5 hours before the alert went out and 223 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 1990-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1209 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 1990-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 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
1209 J/kg
Mixed-layer CIN
-122 J/kg
Mixed-layer LCL
1089 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
48 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-1.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 011834
SVRSAT
TXC029-011915-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
129 PM CDT SAT SEP 1 1990
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  215 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH TEXAS
          ...EASTERN BEXAR
 
AT 125 PM CDT HONDO RADAR INDICATED A SEVERE THUNDERSTORM IN EASTERN
BEXAR COUNTY WHICH WAS MOVING TO THE SOUTH AT AROUND 15 MILES AN HOUR.
 
STRONG GUSTY WINDS...BRIEF HEAVY RAIN...FREQUENT LIGHTNING AND
POSSIBLE HAIL CAN BE EXPECTED WHTIH THIS THUNDERSTORM.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...HAIL
3/4 INCH ORl MORE IN DIAMETER...FREQUENT LIGHTNING AND VERY HEAVY
RAIN.
 
YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.

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, Sep 1, 1:01 PM CDT, 28 minutes before
TXZ054-011900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
101 PM CDT SAT SEP 1 1990

AT 1255 PM CDT RADAR INDICATED STRONG THUNDERSTORMS MOVING INTO EASTERN
VAL VERDE COUNTY AND WERE LOCATED FROM 20 MILES NORTHEAST OF DEL RIO TO
LOMA ALTA. MOVEMENT WAS TO THE SOUTHWEST AT 20 MPH.

HEAVY RAIN...SMALL HAIL...FREQUENT DANGEROUS LIGHTNING AND STRONG GUSTY
WINDS ARE LIKELY WITH THESE STORMS.

THESE STORMS WERE MOVING TOWARDS LAKE AMISTAD. BOATERS AND FISHERMEN ON
LAKE AMISTAD AND SURROUNDING RIVERS SHOULD BE PREPARED TO MOVE QUICKLY
TO SHORE AND AWAY FROM THE WATER IF LIGHTNING IS SEEN...THUNDER IS HEARD
OR WINDS BEGIN INCREASING.

MOTORISTS TRAVELING IN EASTERN VAL VERDE C;OUNTY SHOULD EXERCISE
CAUTION AS WET AND SLIPPERY ROADS ALONG WITH REDUCED VISIBILITY IN
THE SHOWERS...COULD PRESENT A DRIVING HAZARD.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 7:47 PM CDTSevere Thunderstorm WarningEWXJackson, Victoria58 min
Aug 31, 8:05 PM CDTSevere Thunderstorm WarningEWXDeWitt55 min
Aug 31, 8:06 PM CDTSevere Thunderstorm WarningEWXGonzales, Karnes69 min
Aug 31, 8:42 PM CDTSevere Thunderstorm WarningEWXWilson48 min
Aug 31, 9:41 PM CDTSevere Thunderstorm WarningEWXBexar49 min
Sep 1, 2:12 PM CDTSevere Thunderstorm WarningEWXTravis48 min
Sep 1, 2:14 PM CDTSevere Thunderstorm WarningEWXGonzales, Karnes61 min
Sep 1, 2:41 PM CDTSevere Thunderstorm WarningEWXWilson64 min
Sep 1, 3:14 PM CDTSevere Thunderstorm WarningEWXGonzales46 min
Sep 1, 3:17 PM CDTSevere Thunderstorm WarningEWXBurnet58 min
Sep 1, 3:25 PM CDTTornado WarningEWXBexar50 min
Sep 1, 3:47 PM CDTSevere Thunderstorm WarningEWXAtascosa43 min
Sep 1, 4:09 PM CDTSevere Thunderstorm WarningEWXHays, Travis66 min
Sep 1, 4:34 PM CDTSevere Thunderstorm WarningEWXLampasas41 min
Sep 1, 5:00 PM CDTSevere Thunderstorm WarningEWXMedina, Uvalde45 min
Sep 1, 5:20 PM CDTSevere Thunderstorm WarningEWXBexar40 min
Sep 1, 5:47 PM CDTSevere Thunderstorm WarningEWXMedina43 min
Sep 1, 6:11 PM CDTSevere Thunderstorm WarningEWXUvalde49 min

Nearby

Severe Thunderstorm Warnings in Texas, 1990Every severe thunderstorm warning in 1990

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.