Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 1368

June 21, 20049 counties in Arkansas; 47 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2004, 2:36 PM CDT for 9 counties in Arkansas; 47 counties in Texas. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Jun 21, 2004, 2:36 PM CDT (19:36 UTC)
Expired
Jun 21, 2004, 4:00 PM CDT
In force
84 min
Issued by
the Storm Prediction Center
All 56 counties

Columbia County, AR, Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Pike County, AR, Sevier County, AR, Bowie County, TX, Callahan County, TX, Camp County, TX, Cass County, TX, Coleman County, TX, Collin County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Fisher County, TX, Franklin County, TX, Haskell County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, Kaufman County, TX, Lamar County, TX, Marion County, TX, Morris County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Runnels County, TX, Scurry County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Stonewall County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wise County, TX, Wood County, TX, Young County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 61 km from the middle of the area, began a volume at 19:39 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.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 7.6 hours before the alert went out and 33 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 2004-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1714 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 2004-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.1939Sfc1 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
1714 J/kg
Mixed-layer CIN
-165 J/kg
Mixed-layer LCL
1017 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 21, 12:24 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 33 more96 min
Jun 21, 6:36 PM CDTMesoscale DiscussionSPCChicot114 min
Jun 20, 8:39 PM CDTMesoscale DiscussionSPCArmstrong, Carson, Collingsworth, Deaf Smith, Donley, Gray and 12 more2 hr
Jun 20, 9:52 PM CDTMesoscale DiscussionSPCArmstrong, Carson, Collingsworth, Deaf Smith, Donley, Gray and 13 more83 min
Jun 21, 2:25 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 23 more95 min
Jun 21, 3:45 PM CDTSevere Thunderstorm WatchSPCArmstrong, Carson, Dallam, Deaf Smith, Hartley, Hutchinson and 5 more5 hr
Jun 21, 5:21 PM CDTMesoscale DiscussionSPCBrown, Comanche, Eastland, Erath, Hamilton, Mills and 1 more84 min
Jun 21, 6:57 PM CDTMesoscale DiscussionSPCArmstrong, Carson, Dallam, Deaf Smith, Donley, Hartley and 6 more93 min

Nearby

Mesoscale Discussions in Texas, 2004Mesoscale Discussions in Arkansas, 2004Every mesoscale discussion 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.