Alert archive / Texas / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 100

April 21, 20044 states

The Storm Prediction Center issued this severe thunderstorm watch at Apr 21, 2004, 2:00 PM MDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 21, 2004, 2:00 PM MDT (20:00 UTC)
Expired
Apr 21, 2004, 8:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center
All 24 counties

Baca County, CO, Bent County, CO, Kiowa County, CO, Prowers County, CO, Grant County, KS, Hamilton County, KS, Haskell County, KS, Meade County, KS, Morton County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Beaver County, OK, Cimarron County, OK, Texas County, OK, Dallam County, TX, Hansford County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Ochiltree County, TX, Roberts County, TX, Sherman County, TX, Wheeler County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 21, 3:35 PM MDTSevere Thunderstorm WarningDDCGrant, Kearny40 min
Apr 21, 4:06 PM MDTSevere Thunderstorm WarningDDCStanton24 min
Apr 21, 4:11 PM MDTSevere Thunderstorm WarningDDCGrant49 min
Apr 21, 4:14 PM MDTSevere Thunderstorm WarningDDCSeward, Stevens31 min
Apr 21, 4:28 PM MDTSevere Thunderstorm WarningAMABeaver62 min
Apr 21, 4:41 PM MDTSevere Thunderstorm WarningDDCSeward64 min
Apr 21, 4:57 PM MDTSevere Thunderstorm WarningDDCGrant48 min
Apr 21, 5:22 PM MDTTornado WarningDDCSeward48 min
Apr 21, 5:22 PM MDTSevere Thunderstorm WarningAMALipscomb53 min
Apr 21, 5:39 PM MDTTornado WarningDDCMeade61 min
Apr 21, 5:43 PM MDTTornado WarningDDCSeward32 min
Apr 21, 5:47 PM MDTSevere Thunderstorm WarningDDCStevens43 min
Apr 21, 6:07 PM MDTSevere Thunderstorm WarningAMABeaver68 min
Apr 21, 6:15 PM MDTSevere Thunderstorm WarningDDCMeade, Seward60 min
Apr 21, 6:26 PM MDTSevere Thunderstorm WarningDDCStevens49 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

Dodge City, (KDDC), launched 12:00Z, 8.0 hours before the alert went out and 194 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, Dodge City, at 12:00Z on 2004-04-21Temperature 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, Dodge City, at 12:00Z on 2004-04-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
2357 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
206 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
Apr 21, 4:09 PM MDTMesoscale DiscussionSPCBaca, Bent, Prowers66 min
Apr 20, 6:22 PM MDTMesoscale DiscussionSPCAllen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 8 more23 min
Apr 21, 12:56 PM MDTMesoscale DiscussionSPCGrant, Meade, Morton, Seward, Stanton, Stevens94 min
Apr 20, 6:50 PM MDTTornado WatchSPCAdair, Cherokee, Cleveland, Craig, Creek, Delaware and 13 more5 hr
Apr 20, 7:57 PM MDTMesoscale DiscussionSPCAdair, Cherokee, Cleveland, Craig, Creek, Delaware and 13 more2 hr
Apr 20, 9:39 PM MDTMesoscale DiscussionSPCHaskell, Hughes, Latimer, LeFlore, McIntosh, Muskogee and 6 more3 hr
Apr 20, 9:57 PM MDTMesoscale DiscussionSPCAdair, Cherokee, Cleveland, Craig, Creek, Delaware and 13 more93 min
Apr 21, 11:58 AM MDTMesoscale DiscussionSPCAtoka, Beckham, Blaine, Bryan, Caddo, Canadian and 34 more2 hr
Apr 21, 12:50 PM MDTTornado WatchSPCAdair, Alfalfa, Atoka, Beckham, Blaine, Caddo and 55 more7 hr
Apr 21, 3:39 PM MDTMesoscale DiscussionSPCAdair, Alfalfa, Atoka, Beckham, Blaine, Caddo and 47 more66 min
Apr 21, 5:02 PM MDTMesoscale DiscussionSPCAdair, Alfalfa, Atoka, Blaine, Canadian, Cherokee and 43 more88 min
Apr 21, 4:30 PM MDTMesoscale DiscussionSPCCooke, Grayson, Montague60 min

Nearby

Severe Thunderstorm Watches in Texas, 2004Severe Thunderstorm Watches in Kansas, 2004Severe Thunderstorm Watches in Colorado, 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.