Alert archive / Texas / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 185

April 29, 20024 counties in Oklahoma; 14 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 29, 2002, 7:30 PM CDT for 4 counties in Oklahoma; 14 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 29, 2002, 7:30 PM CDT (00:30 UTC)
Expired
Apr 30, 2002, 12:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center

Counties Bryan County, OK, Jefferson County, OK, Love County, OK, Marshall County, OK, Collin County, TX, Cooke County, TX, Dallas County, TX, Denton County, TX, Fannin County, TX, Grayson County, TX, Hunt County, TX, Kaufman County, TX, Montague County, TX, Rains County, TX, Rockwall County, TX, Tarrant County, TX, Van Zandt County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 123 km from the middle of the area, began a volume at 00:30 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 29, 8:39 PM CDTSevere Thunderstorm WarningFWDTarrant66 min
Apr 29, 8:41 PM CDTSevere Thunderstorm WarningFWDTarrant64 min
Apr 29, 8:44 PM CDTSevere Thunderstorm WarningFWDCooke61 min
Apr 29, 9:05 PM CDTSevere Thunderstorm WarningOUNLove40 min
Apr 29, 9:32 PM CDTSevere Thunderstorm WarningOUNMarshall43 min

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.5 hours before the alert went out and 100 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 00:00Z on 2002-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4268 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2002-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
4268 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1291 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
1.6
Supercell composite
10.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 12:00 AM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Carter, Jefferson, Johnston, Love and 1 more5 hr

Nearby

Severe Thunderstorm Watches in Texas, 2002Severe Thunderstorm Watches in Oklahoma, 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; radar from the NEXRAD Level II archive.