Alert archive / Texas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 331, NWS Fort Worth, TX

July 17, 1998Anderson County, Henderson County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jul 17, 1998, 6:25 PM CDT for Anderson County, Henderson County, Texas. It was in force for 20 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jul 17, 1998, 6:25 PM CDT (23:25 UTC)
Expired
Jul 17, 1998, 6:45 PM CDT
In force
20 min
Issued by
NWS Fort Worth, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Anderson County, TX, Henderson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 156 km from the middle of the area, began a volume at 23:28 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

Fort Worth, TX (KFWD), launched 12:00Z, 11.4 hours before the alert went out and 167 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 1998-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 975 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 1998-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.1939Sfc1 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
975 J/kg
Mixed-layer CIN
-175 J/kg
Mixed-layer LCL
1679 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
119 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.

000 
TTAA00 KFTW 172325 RRA
SVRFTW
TXC001-213-172345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
625 PM CDT FRI JUL 17 1998

...CORRECTED HEADER...

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

   * SEVERE THUNDERSTORM WARNING FOR
     HENDERSON COUNTY IN TEXAS
     ANDERSON COUNTY IN TEXAS
     
   * UNTIL 645 PM CDT

   * AT 600 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
     SEVERE THUNDERSTORM 7 MILES WEST OF FRANKSTON...OR ABOUT 18
     MILES SOUTHEAST OF ATHENS...MOVING SOUTHEAST AT 15 MILES PER
     HOUR.

   * OTHER LOCATIONS IN THE WARNING INCLUDE TENNESSEE COLONY...
     NECHES...MONTALBA...LARUE...FRANKSTON...CHANDLER...CAYUGA AND
     BERRYVILLE

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER 
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS OVER 60
MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

LAT...LON 3217 9594 3189 9603 3173 9581 3180 9546
          3234 9545 3228 9571

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 17, 12:50 PM CDTSevere Thunderstorm WarningFWDBosque40 min
Jul 17, 1:28 PM CDTSevere Thunderstorm WarningFWDBosque47 min
Jul 17, 1:50 PM CDTSevere Thunderstorm WarningFWDGrayson40 min
Jul 17, 2:17 PM CDTSevere Thunderstorm WarningFWDHood43 min
Jul 17, 2:24 PM CDTSevere Thunderstorm WarningFWDMcLennan51 min
Jul 17, 2:46 PM CDTSevere Thunderstorm WarningFWDHamilton44 min
Jul 17, 2:50 PM CDTSevere Thunderstorm WarningFWDCooke40 min
Jul 17, 3:47 PM CDTSevere Thunderstorm WarningFWDBell58 min
Jul 17, 3:55 PM CDTSevere Thunderstorm WarningFWDHunt, Kaufman, Rockwall20 min
Jul 17, 4:11 PM CDTSevere Thunderstorm WarningFWDKaufman, Rockwall49 min
Jul 17, 4:17 PM CDTSevere Thunderstorm WarningFWDCollin43 min
Jul 17, 4:31 PM CDTSevere Thunderstorm WarningFWDVan Zandt44 min
Jul 17, 4:50 PM CDTSevere Thunderstorm WarningFWDAnderson40 min
Jul 17, 5:14 PM CDTSevere Thunderstorm WarningFWDHenderson46 min
Jul 17, 5:35 PM CDTSevere Thunderstorm WarningFWDEllis40 min
Jul 17, 6:26 PM CDTSevere Thunderstorm WarningFWDFreestone49 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.