Alert archive / Texas / Tornado Warnings in 1990

Tornado Warning 1, NWS Austin/San Antonio, TX

February 1, 1990La Salle County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at Feb 1, 1990, 3:10 PM CST for La Salle County, Texas. It was in force for 35 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Feb 1, 1990, 3:10 PM CST (21:10 UTC)
Expired: Feb 1, 1990, 3:45 PM CST
In force: 35 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County La Salle County, TX

The radar

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

What was reported inside it

Time	Report	Where	Remark
Feb 1, 3:15 PM CST	Thunderstorm Wind 85	La Salle, TX

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 9.2 hours before the alert went out and 186 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 303 J/kg
Mixed-layer CIN: -163 J/kg
Mixed-layer LCL: 607 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 218 m²/s²
0-3 km storm-relative helicity: 268 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 012112
TORSAT
TXC283-012145-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
310 PM CST THU FEB 1 1990
 
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
          ...LASALLE
 
NATIONAL WEATHER SERVICE RADAR INDICATED A POSSIBLE TORNADO IN
NORTHERN LA SALLE COUNTY...JUST NORTHWEST OF THE CITY OF COTULLA.
RESIDENTS IN GARDENDALE AND LOS ANGELES MAY BE THREATENED BY THIS
STORM.
 
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.
 
LARGE HAIL...FREQUENT LIGHTNING AND VERY HEAVY RAIN WILL LIKELY
ACCOMPANY THIS STORM.

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 1, 3:02 PM CST	Severe Thunderstorm Warning	EWX	La Salle	28 min
Feb 1, 3:38 PM CST	Tornado Warning	EWX	Atascosa, McMullen	59 min
Feb 1, 3:49 PM CST	Severe Thunderstorm Warning	EWX	Bexar	41 min
Feb 1, 4:24 PM CST	Severe Thunderstorm Warning	EWX	Guadalupe, Karnes, Wilson	51 min
Feb 1, 4:27 PM CST	Severe Thunderstorm Warning	EWX	Hays, Travis, Williamson	63 min
Feb 1, 5:02 PM CST	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell	58 min
Feb 1, 5:02 PM CST	Severe Thunderstorm Warning	EWX	Lee, Milam	58 min

Nearby

Tornado Warnings in Texas, 1990 Every tornado warning in 1990 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.