Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 99, NWS Austin/San Antonio, TX

June 26, 2002Williamson County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jun 26, 2002, 6:56 PM CDT for Williamson County, Texas. It was in force for 49 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 26, 2002, 6:56 PM CDT (23:56 UTC)
Expired
Jun 26, 2002, 7:45 PM CDT
In force
49 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Williamson County, TX

What was reported inside it

TimeReportWhereRemark
Jun 26, 7:06 PM CDTThunderstorm Wind 55 MGeorgetown, TXTrees were blown down by severe thunderstorm winds. Also, an 18-wheeler was blown over by the winds.
Jun 26, 7:20 PM CDTHail 1.75Georgetown, 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

Fort Worth, TX (KFWD), launched 12:00Z, 11.9 hours before the alert went out and 246 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, Fort Worth, TX at 12:00Z on 2002-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1208 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, Fort Worth, TX at 12:00Z on 2002-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
1208 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
974 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KEWX 262356
SVRSAT
TXC491-270045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
653 PM CDT WED JUN 26 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS EXTENDED THE

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  WILLIAMSON

* UNTIL 745 PM CDT

* AT 653 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES EAST OF SERENADA...MOVING SOUTH AT 15
  MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  7 MILES EAST OF GEORGETOWN AT 710 PM

VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE
IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A
SUBSTANTIAL SHELTER.


LAT...LON 3062 9778 3049 9745 3047 9719 3070 9728
          3085 9768

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 26, 5:36 PM CDTSevere Thunderstorm WarningEWXFayette39 min
Jun 26, 6:25 PM CDTSevere Thunderstorm WarningEWXWilliamson35 min
Jun 26, 6:53 PM CDTSevere Thunderstorm WarningEWXBastrop, Lee52 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002Every severe thunderstorm warning in 2002

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.