Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 1373

June 21, 200415 counties in Oklahoma; 34 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2004, 10:17 PM CDT for 15 counties in Oklahoma; 34 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Jun 21, 2004, 10:17 PM CDT (03:17 UTC)
Expired
Jun 21, 2004, 11:45 PM CDT
In force
88 min
Issued by
the Storm Prediction Center
All 49 counties

Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kingfisher County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Archer County, TX, 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

The radar

The Altus AFB radar (KFDR), 119 km from the middle of the area, began a volume at 03:21 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 3.3 hours before the alert went out and 184 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, Norman, OK at 00:00Z on 2004-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1521 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, Norman, OK at 00:00Z on 2004-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
1521 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
1043 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
105 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.0

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, 7:52 PM CDTMesoscale DiscussionSPCAlfalfa, Craig, Creek, Delaware, Garfield, Grant and 16 more83 min
Jun 21, 8:05 PM CDTSevere Thunderstorm WatchSPCBeckham, Greer, Harmon, Jackson7 hr
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

Mesoscale Discussions in Texas, 2004Mesoscale Discussions in Oklahoma, 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.