Alert archive / Texas / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 911

December 6, 200436 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Dec 6, 2004, 1:45 PM CST for 36 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Dec 6, 2004, 1:45 PM CST (19:45 UTC)
Expired
Dec 6, 2004, 8:00 PM CST
In force
6 hr
Issued by
the Storm Prediction Center
All 36 counties

Archer County, TX, Bosque County, TX, Brown County, TX, Clay County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Freestone County, TX, Grayson County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Montague County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Van Zandt County, TX, Wise County, TX, Young County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 53 km from the middle of the area, began a volume at 19:47 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

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

IssuedProductOfficeCountiesLasted
Dec 6, 1:51 PM CSTSevere Thunderstorm WarningOUNArcher, Wichita39 min
Dec 6, 2:04 PM CSTSevere Thunderstorm WarningFWDComanche, Eastland56 min
Dec 6, 2:13 PM CSTSevere Thunderstorm WarningOUNClay47 min
Dec 6, 2:19 PM CSTSevere Thunderstorm WarningSJTBrown56 min
Dec 6, 2:24 PM CSTSevere Thunderstorm WarningFWDStephens61 min
Dec 6, 2:33 PM CSTSevere Thunderstorm WarningOUNArcher42 min
Dec 6, 2:36 PM CSTTornado WarningSJTBrown39 min
Dec 6, 2:56 PM CSTSevere Thunderstorm WarningOUNClay49 min
Dec 6, 2:58 PM CSTSevere Thunderstorm WarningFWDComanche, Eastland62 min
Dec 6, 3:10 PM CSTSevere Thunderstorm WarningFWDErath, Palo Pinto65 min
Dec 6, 3:14 PM CSTSevere Thunderstorm WarningFWDMontague61 min
Dec 6, 3:48 PM CSTSevere Thunderstorm WarningFWDHood, Parker, Somervell57 min
Dec 6, 4:11 PM CSTSevere Thunderstorm WarningFWDJohnson, Tarrant64 min
Dec 6, 4:15 PM CSTSevere Thunderstorm WarningFWDBosque30 min
Dec 6, 4:36 PM CSTSevere Thunderstorm WarningFWDHill39 min
Dec 6, 4:53 PM CSTSevere Thunderstorm WarningFWDDallas, Ellis52 min
Dec 6, 5:19 PM CSTSevere Thunderstorm WarningFWDHenderson, Kaufman, Navarro56 min
Dec 6, 5:44 PM CSTSevere Thunderstorm WarningFWDHenderson, Rains, Van Zandt61 min
Dec 6, 5:45 PM CSTSevere Thunderstorm WarningFWDEllis15 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 7.8 hours before the alert went out and 65 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 2004-12-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2004-12-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 145 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1269 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
145 m²/s²
0-3 km storm-relative helicity
239 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
Dec 6, 10:35 AM CSTMesoscale DiscussionSPCBorden, Callahan, Coke, Coleman, Fisher, Glasscock and 16 more115 min
Dec 6, 11:55 AM CSTSevere Thunderstorm WatchSPCCallahan, Coke, Coleman, Concho, Fisher, Haskell and 8 more5 hr
Dec 6, 12:20 PM CSTMesoscale DiscussionSPCArcher, Baylor, Clay, Foard, Hardeman, Jack and 6 more115 min
Dec 6, 12:40 PM CSTSevere Thunderstorm WatchSPCArcher, Baylor, Clay, Cooke, Hardeman, Knox and 3 more5 hr
Dec 6, 1:30 PM CSTMesoscale DiscussionSPCBosque, Brown, Callahan, Coleman, Comanche, Coryell and 17 more90 min
Dec 6, 4:58 PM CSTMesoscale DiscussionSPCAnderson, Baylor, Bosque, Bowie, Brown, Camp and 46 more92 min
Dec 6, 5:45 PM CSTSevere Thunderstorm WatchSPCAnderson, Bowie, Camp, Cass, Cherokee, Franklin and 13 more5 hr

Nearby

Severe Thunderstorm Watches in Texas, 2004Every severe thunderstorm watch in 2004

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.