Alert archive / Texas / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 635

August 25, 2002Caddo Parish, De Soto Parish, Louisiana; 7 counties in Oklahoma; 31 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Aug 25, 2002, 12:00 PM CDT for Caddo Parish, De Soto Parish, Louisiana; 7 counties in Oklahoma; 31 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Aug 25, 2002, 12:00 PM CDT (17:00 UTC)
Expired
Aug 25, 2002, 6:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 40 counties

Caddo Parish, LA, De Soto Parish, LA, Bryan County, OK, Carter County, OK, Choctaw County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Camp County, TX, Cass County, TX, Collin County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Marion County, TX, Montague County, TX, Morris County, TX, Navarro County, TX, Panola County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Rusk County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

Warnings issued inside it

9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Aug 25, 1:37 PM CDTSevere Thunderstorm WarningFWDFannin53 min
Aug 25, 1:42 PM CDTSevere Thunderstorm WarningFWDCooke, Grayson63 min
Aug 25, 2:15 PM CDTSevere Thunderstorm WarningFWDLamar60 min
Aug 25, 2:29 PM CDTSevere Thunderstorm WarningFWDCollin, Denton, Hunt61 min
Aug 25, 3:08 PM CDTSevere Thunderstorm WarningFWDDallas, Rockwall67 min
Aug 25, 3:32 PM CDTSevere Thunderstorm WarningFWDKaufman, Van Zandt58 min
Aug 25, 4:38 PM CDTSevere Thunderstorm WarningSHVSmith52 min
Aug 25, 4:46 PM CDTSevere Thunderstorm WarningSHVCass59 min
Aug 25, 5:14 PM CDTSevere Thunderstorm WarningSHVCaddo61 min

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 5.0 hours before the alert went out and 160 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 2002-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1122 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 2002-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
1122 J/kg
Mixed-layer CIN
-231 J/kg
Mixed-layer LCL
1573 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
19 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 25, 3:50 PM CDTSevere Thunderstorm WatchSPCAllen, Beauregard, Calcasieu, Cameron, Jefferson Davis, Sabine and 2 more5 hr

Nearby

Severe Thunderstorm Watches in Texas, 2002Severe Thunderstorm Watches in Oklahoma, 2002Severe Thunderstorm Watches in Louisiana, 2002Every severe thunderstorm watch 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; the sounding from the Mesonet's radiosonde archive.