Alert archive / Texas / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 506

June 21, 20044 counties in Oklahoma; 33 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Jun 21, 2004, 8:05 PM CDT for 4 counties in Oklahoma; 33 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 21, 2004, 8:05 PM CDT (01:05 UTC)
Expired
Jun 22, 2004, 3:00 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
All 37 counties

Beckham County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Armstrong County, TX, Baylor County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, King County, TX, Knox County, TX, Lubbock County, TX, Moore County, TX, Motley County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Swisher County, TX, Wheeler County, TX, Wilbarger County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 21, 8:27 PM CDTTornado WarningAMARandall63 min
Jun 21, 8:33 PM CDTSevere Thunderstorm WarningAMAHutchinson87 min
Jun 21, 8:36 PM CDTSevere Thunderstorm WarningAMAOldham39 min
Jun 21, 8:46 PM CDTTornado WarningLUBSwisher44 min
Jun 21, 8:50 PM CDTTornado WarningAMAOldham40 min
Jun 21, 8:53 PM CDTSevere Thunderstorm WarningAMAMoore97 min
Jun 21, 9:00 PM CDTSevere Thunderstorm WarningAMAArmstrong60 min
Jun 21, 9:18 PM CDTSevere Thunderstorm WarningAMAPotter42 min
Jun 21, 9:31 PM CDTSevere Thunderstorm WarningLUBSwisher44 min
Jun 21, 9:33 PM CDTTornado WarningAMAPotter27 min
Jun 21, 9:38 PM CDTSevere Thunderstorm WarningLUBBriscoe67 min
Jun 21, 9:47 PM CDTSevere Thunderstorm WarningAMACarson73 min
Jun 21, 9:56 PM CDTSevere Thunderstorm WarningOUNBeckham, Washita64 min
Jun 21, 9:59 PM CDTSevere Thunderstorm WarningAMAPotter31 min
Jun 21, 9:59 PM CDTSevere Thunderstorm WarningAMAGray91 min
Jun 21, 10:09 PM CDTSevere Thunderstorm WarningLUBFloyd66 min
Jun 21, 10:13 PM CDTFlash Flood WarningAMAHartley3 hr
Jun 21, 10:14 PM CDTSevere Thunderstorm WarningAMAArmstrong46 min
Jun 21, 10:15 PM CDTSevere Thunderstorm WarningLUBSwisher30 min
Jun 21, 10:34 PM CDTSevere Thunderstorm WarningLUBCastro56 min
Jun 21, 11:15 PM CDTSevere Thunderstorm WarningLUBFloyd45 min
Jun 21, 11:26 PM CDTSevere Thunderstorm WarningLUBMotley49 min
Jun 22, 1:07 AM CDTSevere Thunderstorm WarningLUBChildress53 min
Jun 22, 1:09 AM CDTSevere Thunderstorm WarningLUBFloyd21 min
Jun 22, 1:26 AM CDTSevere Thunderstorm WarningOUNFoard, Hardeman, Wilbarger49 min
Jun 22, 2:09 AM CDTSevere Thunderstorm WarningOUNWilbarger51 min
Jun 22, 2:12 AM CDTSevere Thunderstorm WarningOUNWilbarger48 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.1 hours before the alert went out and 77 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, Amarillo Airport, TX at 00:00Z on 2004-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2119 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 00:00Z on 2004-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.19395878Sfc1 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
2119 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
1225 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.7

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 21, 7:52 PM CDTMesoscale DiscussionSPCAlfalfa, Craig, Creek, Delaware, Garfield, Grant and 16 more83 min
Jun 21, 10:17 PM CDTMesoscale DiscussionSPCBeckham, Blaine, Caddo, Canadian, Custer, Dewey and 9 more88 min
Jun 21, 10:25 PM CDTSevere Thunderstorm WatchSPCBlaine, Canadian, Custer, Dewey, Garfield, Kingfisher and 5 more5 hr
Jun 21, 11:27 PM CDTMesoscale DiscussionSPCBlaine, Canadian, Carter, Cotton, Custer, Dewey and 10 more93 min
Jun 21, 11:44 PM CDTMesoscale DiscussionSPCBeckham, Greer, Harmon, Jackson91 min
Jun 22, 2:48 AM CDTMesoscale DiscussionSPCComanche, Cotton, Tillman27 min
Jun 22, 4:05 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Coal, Haskell, Hughes and 10 more2 hr
Jun 22, 10:27 AM CDTMesoscale DiscussionSPCAnderson, Angelina, Brazoria, Cass, Chambers, Cherokee and 34 more2 hr
Jun 22, 11:55 AM CDTSevere Thunderstorm WatchSPCAngelina, Brazoria, Chambers, Galveston, Hardin, Harris and 14 more5 hr
Jun 22, 3:10 PM CDTMesoscale DiscussionSPCJasper, Jefferson, Newton, Orange, Panola, Sabine and 2 more95 min

Nearby

Severe Thunderstorm Watches in Texas, 2004Severe Thunderstorm Watches in Oklahoma, 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.