Alert archive / Texas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 1, NWS Austin/San Antonio, TX

February 19, 1997Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Feb 19, 1997, 9:51 PM CST for Val Verde County, Texas. It was in force for 69 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Feb 19, 1997, 9:51 PM CST (03:51 UTC)
Expired
Feb 19, 1997, 11:00 PM CST
In force
69 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Val Verde County, TX

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Feb 19, 9:45 PM CSTTornado WatchSPC5 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 3.9 hours before the alert went out and 66 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 00:00Z on 1997-02-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 810 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 00:00Z on 1997-02-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 square meters per square second.1939587897117Sfc1 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
810 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
917 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
0.6
Supercell composite
2.9

Open this sounding in Storm Lab

The text

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

631 
WUUS1 KSAT 200352 RRA
SVRSAT
TXC465-200500-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
951 PM CST WED FEB 19 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1100 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...EASTERN VAL VERDE COUNTY
 
AT 950 PM CST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES
WEST OF DEL RIO. MOVEMENT WAS EAST NORTHEAST AT 30 MPH. THIS WILL TAKE
THE STORM ACROSS LAKE AMISTAD.
 
ALTHOUGH NO TORNADOES HAVE BEEN DETECTED WITH THIS STORM...A
TORNADO WATCH REMAINS IN EFFECT.  SEVERE THUNDERSTORMS CAN AND
OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING
SO BE ON THE LOOKOUT.

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, Feb 19, 5:29 PM CST, 4 hours 22 minutes before
TXZ171>173-183>194-202>209-217>225-228-201200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
530 PM CST WED FEB 19 1997

A WEATHER SYSTEM TO THE WEST OF SOUTH TEXAS WILL CONTINUE MOVING
EAST...BRINGING A GOOD CHANCE FOR SHOWERS AND THUNDERSTORMS TO ALL
OF SOUTH CENTRAL TEXAS.  SOME OF THE SHOWERS AND THUNDERSTORMS COULD
INCREASE IN STRENGTH ENOUGH TO BECOME SEVERE.

LOCALLY HEAVY RAIN IS ALSO POSSIBLE WITH THIS MID TO LATE FEBRUARY
OF 1997 WEATHER SYSTEM.  RAINFALL AMOUNTS THROUGH THURSDAY MORNING ARE
EXPECTED TO AVERAGE NEAR ONE INCH OVER THE EDWARDS PLATEAU...NEAR ONE
TO TWO INCHES OVER THE HILL COUNTRY AND IN THE VICINITY OF THE BALCONES
ESCARPMENT.  ISOLATED HIGHER TOTALS OF THREE TO FOUR INCHES ARE
POSSIBLE.

THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF
THE ZONE FORECASTS...SHORT TERM FORECASTS...WATCHES...WARNINGS AND
ADVISORIES.  THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDfATED
ONLY IF UNFORECAST HAZARDOUS WEATHER DEVELOPS OR IF FORECAST
HAZARDOUS WEATHER NO LONGER IS EXPECTED.
Special weather statement, Feb 19, 5:30 PM CST, 4 hours 21 minutes before
TXZ171>173-183>194-202>209-217>225-228-201200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
530 PM CST WED FEB 19 1997

A WEATHER SYSTEM TO THE WEST OF SOUTH TEXAS WILL CONTINUE MOVING
EAST...BRINGING A GOOD CHANCE FOR SHOWERS AND THUNDERSTORMS TO ALL
OF SOUTH CENTRAL TEXAS.  SOME OF THE SHOWERS AND THUNDERSTORMS COULD
INCREASE IN STRENGTH ENOUGH TO BECOME SEVERE.

LOCALLY HEAVY RAIN IS ALSO POSSIBLE WITH THIS MID TO LATE FEBRUARY
OF 1997 WEATHER SYSTEM.  RAINFALL AMOUNTS THROUGH THURSDAY MORNING ARE
EXPECTED TO AVERAGE NEAR ONE INCH OVER THE EDWARDS PLATEAU...NEAR ONE
TO TWO INCHES OVER THE HILL COUNTRY AND IN THE VICINITY OF THE BALCONES
ESCARPMENT.  ISOLATED HIGHER TOTALS OF THREE TO FOUR INCHES ARE
POSSIBLE.

THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF
THE ZONE FORECASTS...SHORT TERM FORECASTS...WATCHES...WARNINGS AND
ADVISORIES.  THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED
ONLY IF UNFORECAST HAZARDOUS WEATHER DEVELOPS OR IF FORECAST
HAZARDOUS WEATHER NO LONGER IS EXPECTED.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 19, 9:10 PM CSTFlash Flood WarningEWXVal Verde3 hr
Feb 19, 11:46 PM CSTFlash Flood WarningEWXVal Verde4 hr
Feb 20, 3:07 AM CSTFlash Flood WarningEWXGillespie4 hr
Feb 20, 3:49 AM CSTFlash Flood WarningEWXVal Verde116 min
Feb 20, 7:07 AM CSTFlash Flood WarningEWXGillespie3 hr
Feb 20, 7:22 AM CSTFlash Flood WarningEWXReal3 hr
Feb 20, 8:51 AM CSTFlash Flood WarningEWXKerr4 hr
Feb 20, 9:53 AM CSTFlash Flood WarningEWXGillespie, Llano4 hr

Nearby

Severe Thunderstorm Warnings in Texas, 1997Every severe thunderstorm warning in 1997

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.