Alert archive / Texas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 6, NWS Austin/San Antonio, TX

January 6, 1998Atascosa County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jan 6, 1998, 1:31 PM CST for Atascosa County, Texas. It was in force for 59 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
Jan 6, 1998, 1:31 PM CST (19:31 UTC)
Expired
Jan 6, 1998, 2:30 PM CST
In force
59 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Atascosa County, TX

The radar

The Austin/San Antonio radar (KEWX), 102 km from the middle of the area, began a volume at 19:33 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
Jan 6, 1:50 PM CSTHail 0.75Jourdanton, 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.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 7.5 hours before the alert went out and 174 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 1998-01-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1989 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, Corpus Christi, TX at 12:00Z on 1998-01-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 square meters per square second.1939587897Sfc1 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
1989 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
476 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
124 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.7

Open this sounding in Storm Lab

The text

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

312 
WUUS1 KSAT 061932 RRA
SVRSAT
TXC013-062030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
131 PM CST TUE JAN 6 1998
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  230 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...ATASCOSA COUNTY
 
AT 1:30 PM...RADAR INDICATED A SEVERE THUNDERSTORM NEAR HINDES
MOVING NORTHEAST AT 25 MPH. CHARLOTTE...JOURDANTON AND POTEET
ARE IN THE PATH OF THIS STORM.
 
PEOPLE IN THE PATH OF THIS STORM SHOULD BE ALERT TO THE POSSIBILITY
OF LARGE HAIL AND DAMAGING WINDS.  FREQUENT LIGHTNING AND LOCALLY
HEAVY RAIN CAN ALSO OCCUR WITH SEVERE THUNDERSTORMS...FLOODING SMALL
STREAMS...LOW AREAS...AND LOW WATER CROSSINGS.

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

Local storm report, Jan 6, 11:13 AM CST, 2 hours 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TEXAS
1113 AM CST TUE JAN 06 1998

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....
 1010 AM    COUPLAND                  TX   1.75 INCH HAIL
01/06/98   WILLIAMSON
Local storm report, Jan 6, 11:13 AM CST, 2 hours 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TEXAS
1113 AM CST TUE JAN 06 1998

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....
 1010 AM    COUPLAND                  TX   1.75 INCH HAIL
01/06/98   WILLIAMSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 5, 10:40 PM CSTSevere Thunderstorm WarningEWXBurnet50 min
Jan 6, 6:56 AM CSTFlash Flood WarningEWXBandera, Gillespie, Kerr5 hr
Jan 6, 8:11 AM CSTFlash Flood WarningEWXLlano4 hr
Jan 6, 8:45 AM CSTSevere Thunderstorm WarningEWXGillespie60 min
Jan 6, 9:52 AM CSTSevere Thunderstorm WarningEWXWilliamson68 min
Jan 6, 11:02 AM CSTSevere Thunderstorm WarningEWXFrio43 min
Jan 6, 11:51 AM CSTFlash Flood WarningEWXFrio69 min
Jan 6, 11:51 AM CSTSevere Thunderstorm WarningEWXFrio69 min
Jan 6, 12:17 PM CSTFlash Flood WarningEWXMedina3 hr
Jan 6, 12:41 PM CSTFlash Flood WarningEWXBexar2 hr
Jan 6, 12:55 PM CSTFlash Flood WarningEWXFrio2 hr
Jan 6, 2:08 PM CSTFlash Flood WarningEWXAtascosa2 hr
Jan 6, 2:32 PM CSTFlash Flood WarningEWXBexar, Comal118 min
Jan 6, 4:13 PM CSTFlash Flood WarningEWXDeWitt, Gonzales, Lavaca3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 1998Every severe thunderstorm warning in 1998

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.