Alert archive / Texas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 71, NWS Austin/San Antonio, TX

May 15, 1997Bexar County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 15, 1997, 6:05 PM CDT for Bexar County, Texas. It was in force for 55 min. 4 reports 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 15, 1997, 6:05 PM CDT (23:05 UTC)
Expired
May 15, 1997, 7:00 PM CDT
In force
55 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Bexar County, TX

The radar

The Austin/San Antonio radar (KEWX), 55 km from the middle of the area, began a volume at 23:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
May 15, 6:09 PM CDTHail 0.75San Antonio, TX
May 15, 6:15 PM CDTHail 0.75San Antonio, TX
May 15, 6:15 PM CDTHail 0.75San Antonio, TX
May 15, 7:00 PM CDTThunderstorm WindSt Hedwig, TXWidespread reports received from St. Hedgwick of trees blown over by severe winds.

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.

The watch it was issued in

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

IssuedProductOfficeLasted
May 15, 4:45 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 11.1 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 1997-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1447 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 12:00Z on 1997-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 square meters per square second.193958Sfc1 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
1447 J/kg
Mixed-layer CIN
-161 J/kg
Mixed-layer LCL
1052 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
243 m²/s²
Significant tornado parameter
0.2
Supercell composite
7.5

Open this sounding in Storm Lab

The text

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

192 
WUUS1 KSAT 152307 RRA
SVRSAT
TXC029-160000-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
605 PM CDT THU MAY 15 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  700 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...BEXAR COUNTY
 
AT 605 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM OVER NORTHERN SAN
ANTONIO. THIS STORM WAS MOVING SLOWLY EAST AND SOUTHEAST.
 
PEOPLE IN SAN ANTONIO SHOULD BE ALERT TO THE POSSIBILITY
OF LARGE HAIL AND DAMAGING WINDS.
 
CALL YOUR REPORTS OF SEVERE WEATHER TO LOCAL LAW ENFORCEMENT FOR
RELAY TO THE NATIONAL WEATHER SERVICE.

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, May 15, 5:58 PM CDT, 7 minutes before
TXZ171>173-183>194-202>209-217>225-228-161200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
600 PM CDT THU MAY 15 1997

...A SEVERE THUNDERSTORM WARNING IS IN EFFECT TIL 630 PM CDT FOR
FRIO COUNTY...
...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR A LARGE PORTION
OF THE HILL COUNTRY AND SOUTH CENTRAL TEXAS TIL 11 PM...

THIS EVENING..SCATTERED SEVERE THUNDERSTORMS HAVE ERUPTED OVER
PORTIONS OF SOUTH CENTRAL TEXAS...AND THE HILL COUNTRY.
CONDITIONS REMAIN RIPE FOR FURTHER DEVELOPMENT OF SEVERE THUNDERSTORMS
THIS EVENING..WITH THE MAIN THREAT BEING FROM LARGE HAIL.

REPORTS OF BASEBALL SIZE HAIL HAVE BEEN RECEIVED FROM BULVERDE IN
COMAL COUNTY.  OTHER REPORTS INCLUDE 1 INCH DIAMETER HAIL IN HINDES
IN SOUTHWESTERN ATASCOSA COUNTY. WITHIN METRO SAN ANTONIO..REPORTS
OF QUARTER SIZE HAIL HAVE BEEN RECEIVED FROM LEON VALLEY AS WELL AS
A REPORT OF PEA SIZE HAIL OVER NORTHWEST LOOP 410.

THE HAZARDOUS WEATHER OUTLOOK  WILL NORMALLY BE UPDATED BY MEANS OF
THE ZONE FORECAST...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 IS NO LONGER EXPECTED.
Special weather statement, May 15, 6:00 PM CDT, 5 minutes before
TXZ171>173-183>194-202>209-217>225-228-161200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
600 PM CDT THU MAY 15 1997

...A SEVERE THUNDERSTORM WARNING IS IN EFFECT TIL 630 PM CDT FOR
FRIO COUNTY...
...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR A LARGE PORTION
OF THE HILL COUNTRY AND SOUTH CENTRAL TEXAS TIL 11 PM...

THIS EVENING..SCATTERED SEVERE THUNDERSTORMS HAVE ERUPTED OVER
PORTIONS OF SOUTH CENTRAL TEXAS...AND THE HILL COUNTRY.
CONDITIONS REMAIN RIPE FOR FURTHER DEVELOPMENT OF SEVERE THUNDERSTORMS
THIS EVENING..WITH THE MAIN THREAT BEING FROM LARGE HAIL.

REPORTS OF BASEBALL SIZE HAIL HAVE BEEN RECEIVED FROM BULVERDE IN
COMAL COUNTY.  OTHER REPORTS INCLUDE 1 INCH DIAMETER HAIL IN HINDES
IN SOUTHWESTERN ATASCOSA COUNTY. WITHIN METRO SAN ANTONIO..REPORTS
OF QUARTER SIZE HAIL HAVE BEEN RECEIVED FROM LEON VALLEY AS WELL AS
A REPORT OF PEA SIZE HAIL OVER NORTHWEST LOOP 410.

THE HAZARDOUS WEATHER OUTLOOK  WILL NORMALLY BE UPDATED BY MEANS OF
THE ZONE FORECAST...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 IS NO LONGER EXPECTED.

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 4:03 PM CDTSevere Thunderstorm WarningEWXComal57 min
May 15, 4:12 PM CDTSevere Thunderstorm WarningEWXBandera63 min
May 15, 4:23 PM CDTSevere Thunderstorm WarningEWXFrio67 min
May 15, 4:45 PM CDTSevere Thunderstorm WarningEWXDimmit60 min
May 15, 4:53 PM CDTSevere Thunderstorm WarningEWXAtascosa67 min
May 15, 5:02 PM CDTSevere Thunderstorm WarningEWXBexar58 min
May 15, 5:27 PM CDTSevere Thunderstorm WarningEWXFrio63 min
May 15, 6:42 PM CDTSevere Thunderstorm WarningEWXLlano63 min

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.