Alert archive / Texas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 11, NWS Austin/San Antonio, TX

January 21, 1998Llano County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jan 21, 1998, 5:54 PM CST for Llano County, Texas. It was in force for 66 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
Jan 21, 1998, 5:54 PM CST (23:54 UTC)
Expired
Jan 21, 1998, 7:00 PM CST
In force
66 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Llano County, TX

The radar

The Ft Hood radar (KGRK), 124 km from the middle of the area, began a volume at 23:53 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.

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 11.9 hours before the alert went out and 255 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 12:00Z on 1998-01-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 53 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 12:00Z on 1998-01-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.19395878Sfc1 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
53 J/kg
Mixed-layer CIN
-336 J/kg
Mixed-layer LCL
517 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

583 
WUUS1 KSAT 212355 RRA
SVRSAT
TXC299-220100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
554 PM CST WED JAN 21 1998
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  700 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...LLANO COUNTY
 
AT 555 PM CST DOPPLER RADAR INDICATED A POSSIBLY SEVERE THUNDERSTORM
NEAR CASTELL IN WESTERN LLANO COUNTY AND WAS MOVING TO THE EAST ALONG
HWY 29 AT 20 MPH.
 
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 21, 3:26 PM CST, 2 hours 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TEXAS
326 PM CST WED JAN 21 1998

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0230 PM    LEXINGTON                 TX   TORNADO
01/21/98   LEE                            FUNNEL CLOUD REPORTED BY
                                          SHERIFF.

0230 PM    PAIGE                     TX   TORNADO
01/21/98   BASTROP                        FUNNEL CLOUD ON COUNTY
                                          LINE.  REPORTED BY
                                          SHERIFF.

0230 PM    LEXINGTON                 TX   .75 INCH HAIL
01/21/98   LEE                            REPORTED BY SHERIFF.

0245 PM    PAIGE                     TX   TORNADO
01/21/98   BASTROP                        FUNNEL CLOUD NORTH OF
                                          PAIGE OVER LEE COUNTY.

0256 PM    DIME BOX                  TX   TORNADO
01/21/98   LEE                            TORNADO ON GROUND BETWEEN
                                          DIME BOX AND HWY 77.
                                          REPORTED BY PUBLIC.

0309 PM    DIME BOX                  TX   TORNADO
01/21/98   LEE                            TORNADO ON GROUND NEAR
                                          DIME BOX.  REPORTED BY
                                          CONSTABLE.
Local storm report, Jan 21, 3:26 PM CST, 2 hours 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TEXAS
326 PM CST WED JAN 21 1998

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0230 PM    LEXINGTON                 TX   TORNADO
01/21/98   LEE                            FUNNEL CLOUD REPORTED BY
                                          SHERIFF.

0230 PM    PAIGE                     TX   TORNADO
01/21/98   BASTROP                        FUNNEL CLOUD ON COUNTY
                                          LINE.  REPORTED BY
                                          SHERIFF.

0230 PM    LEXINGTON                 TX   .75 INCH HAIL
01/21/98   LEE                            REPORTED BY SHERIFF.

0245 PM    PAIGE                     TX   TORNADO
01/21/98   BASTROP                        FUNNEL CLOUD NORTH OF
                                          PAIGE OVER LEE COUNTY.

0256 PM    DIME BOX                  TX   TORNADO
01/21/98   LEE                            TORNADO ON GROUND BETWEEN
                                          DIME BOX AND HWY 77.
                                          REPORTED BY PUBLIC.

0309 PM    DIME BOX                  TX   TORNADO
01/21/98   LEE                            TORNADO ON GROUND NEAR
                                          DIME BOX.  REPORTED BY
                                          CONSTABLE.

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 21, 1:47 PM CSTSevere Thunderstorm WarningEWXBastrop58 min
Jan 21, 1:59 PM CSTSevere Thunderstorm WarningEWXLee46 min
Jan 21, 2:23 PM CSTTornado WarningEWXLee52 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.