Alert archive / Texas / Tornado Warnings in 1990

Tornado Warning 15, NWS Austin/San Antonio, TX

September 11, 1990Bexar County, Medina County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at Sep 11, 1990, 12:27 PM CDT for Bexar County, Medina County, Texas. It was in force for 48 min.

The area

The counties it named.

The facts

Issued
Sep 11, 1990, 12:27 PM CDT (17:27 UTC)
Expired
Sep 11, 1990, 1:15 PM CDT
In force
48 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Bexar County, TX, Medina 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

Del Rio, TX (KDRT), launched 12:00Z, 5.5 hours before the alert went out and 196 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 1990-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 70 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 1990-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 square meters per square second.1939Sfc1 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
70 J/kg
Mixed-layer CIN
-181 J/kg
Mixed-layer LCL
1193 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
25 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 111729
TORSAT
TXC029-325-111815-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1227 PM CDT TUE SEP 11 1990
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  115 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH TEXAS
          ...WESTERN BEXAR...EASTERN MEDINA
 
AT 1225 PM...SEVERAL REPORTS OF A FUNNEL CLOUD WERE RECEIVED BY LOCAL
LAW ENFORCEMENT AGENCIES BETWEEN THE TOWN OF RIOMEDINA IN MEDINA
COUNTY AND LOOP 1604 IN WEST BEXAR COUNTY. AT ONE POINT THE FUNNEL
CLOUD REACHED THE GROUND OVER AN OPEN FIELD.
 
NATIONAL WEATHER SERVICE RADAR INDICATED AN INTENSE THUNDERSTORM
DEVELOPING RADIDLY IN THAT VICINITY MOVING TO THE EAST AT 5 TO 10 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.
 
PLEASE LISTEN TO YOUR LOCAL RADIO...TV OR NOAA WEATHER RADIO STATION
FOR LATER STATEMENTS OR WARNINGS REGARDING THIS SEVERE WEATHER EVENT.

Nearby

Tornado Warnings in Texas, 1990Every tornado warning in 1990Tornadoes 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.