Alert archive / Texas / Tornado Warnings in 1990

Tornado Warning 10, NWS Austin/San Antonio, TX

May 21, 1990Kerr County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at May 21, 1990, 2:37 PM CDT for Kerr County, Texas. It was in force for 68 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: May 21, 1990, 2:37 PM CDT (19:37 UTC)
Expired: May 21, 1990, 3:45 PM CDT
In force: 68 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Kerr 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
May 21, 2:43 PM CDT	Hail 1.75	Kerr, 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

Del Rio, TX (KDRT), launched 12:00Z, 7.6 hours before the alert went out and 163 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: 631 J/kg
Mixed-layer CIN: -410 J/kg
Mixed-layer LCL: 1611 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 211938
TORSAT
TXC265-212045-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
237 PM CDT MON MAY 21 1990
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  345 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH TEXAS
          ...KERR
 
AT 235 PM CDT...HONDO RADAR INDICATED A POSSIBLE TORNADO NEAR
KERRVILLE.  MOVEMENT HAS NOT BEEN DETERMINED.  SMALL HAIL WAS
REPORTED IN THIS STORM DURING THE PAST HALF HOUR.
 
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.
 
YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.
 
PLEASE LISTEN TO YOUR LOCAL RADIO...TV OR NOAA WEATHER RADIO STATION
FOR LATER STATEMENTS OR WARNINGS REGARDING THIS SEVERE WEATHER EVENT.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 8:02 PM CDT	Severe Thunderstorm Warning	EWX	McMullen	58 min
May 20, 8:35 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa	55 min
May 20, 9:21 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa	54 min
May 20, 10:20 PM CDT	Severe Thunderstorm Warning	EWX	Bexar	50 min
May 20, 10:29 PM CDT	Severe Thunderstorm Warning	EWX	Wilson	76 min
May 20, 10:59 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales	61 min
May 21, 2:06 PM CDT	Severe Thunderstorm Warning	EWX	Kerr	69 min
May 21, 5:23 PM CDT	Severe Thunderstorm Warning	EWX	Travis	67 min
May 21, 6:07 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde	68 min
May 21, 6:15 PM CDT	Severe Thunderstorm Warning	EWX	Williamson	45 min
May 21, 6:30 PM CDT	Severe Thunderstorm Warning	EWX	Travis	30 min
May 21, 6:44 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	61 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.