Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 1371

June 21, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2004, 5:57 PM MDT for 4 states. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Jun 21, 2004, 5:57 PM MDT (23:57 UTC)
Expired: Jun 21, 2004, 7:30 PM MDT
In force: 93 min
Issued by: the Storm Prediction Center

Counties Baca County, CO, Las Animas County, CO, Union County, NM, Cimarron County, OK, Armstrong County, TX, Carson County, TX, Dallam County, TX, Deaf Smith County, TX, Donley County, TX, Hartley County, TX, Hutchinson County, TX, Moore County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Sherman County, TX

The watches that followed

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

Severe Thunderstorm Watch 506Jun 21, 7:05 PM MDT

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 12.0 hours before the alert went out and 101 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 811 J/kg
Mixed-layer CIN: -219 J/kg
Mixed-layer LCL: 1583 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 268 m²/s²
0-3 km storm-relative helicity: 361 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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.

Issued	Product	Office	Counties	Lasted
Jun 21, 1:25 PM MDT	Mesoscale Discussion	SPC	Alamosa, Baca, Bent, Costilla, Custer, Fremont and 4 more	95 min
Jun 21, 2:45 PM MDT	Severe Thunderstorm Watch	SPC	Baca, Las Animas	5 hr
Jun 20, 7:39 PM MDT	Mesoscale Discussion	SPC	Beaver, Beckham, Dewey, Ellis, Greer, Harper and 4 more	2 hr
Jun 20, 8:52 PM MDT	Mesoscale Discussion	SPC	Alfalfa, Beaver, Beckham, Blaine, Ellis, Garfield and 7 more	83 min
Jun 20, 9:35 PM MDT	Severe Thunderstorm Watch	SPC	Alfalfa, Blaine, Canadian, Custer, Dewey, Garfield and 10 more	4 hr
Jun 20, 11:59 PM MDT	Mesoscale Discussion	SPC	Craig, Creek, Garfield, Grant, Kay, Kingfisher and 12 more	61 min
Jun 21, 1:00 AM MDT	Mesoscale Discussion	SPC	Blaine, Canadian, Creek, Custer, Dewey, Ellis and 15 more	3 hr
Jun 21, 1:36 PM MDT	Mesoscale Discussion	SPC	Bowie, Callahan, Camp, Cass, Coleman, Collin and 41 more	84 min
Jun 21, 4:21 PM MDT	Mesoscale Discussion	SPC	Brown, Comanche, Eastland, Erath, Hamilton, Mills and 1 more	84 min

Nearby

Mesoscale Discussions in Texas, 2004 Mesoscale Discussions in Colorado, 2004 Mesoscale Discussions in New Mexico, 2004 Every 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.