Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 1515

July 5, 200411 counties in Oklahoma; 18 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jul 5, 2004, 2:22 AM CDT for 11 counties in Oklahoma; 18 counties in Texas. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Jul 5, 2004, 2:22 AM CDT (07:22 UTC)
Expired: Jul 5, 2004, 4:15 AM CDT
In force: 113 min
Issued by: the Storm Prediction Center

All 29 counties

Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Washita County, OK, Woodward County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Donley County, TX, Floyd County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Hutchinson County, TX, Motley County, TX, Roberts County, TX, Swisher County, TX, Wheeler County, TX

The radar

The Altus AFB radar (KFDR), 99 km from the middle of the area, began a volume at 07:24 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 7.4 hours before the alert went out and 179 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: 237 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 3755 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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
Jul 4, 7:12 PM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Dewey, Ellis, Greer, Harper and 3 more	2 hr
Jul 4, 9:21 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 13 more	54 min
Jul 4, 9:40 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Beaver, Craig, Garfield, Grant, Harper and 9 more	6 hr
Jul 4, 11:20 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Grant, Harper, Kay, Woods	55 min
Jul 5, 2:06 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Craig, Grant, Harper, Kay, Mayes and 5 more	114 min
Jul 5, 3:25 AM CDT	Severe Thunderstorm Watch	SPC	Craig, Delaware, Garfield, Kay, Mayes, Noble and 6 more	6 hr
Jul 5, 6:02 AM CDT	Mesoscale Discussion	SPC	Craig, Delaware, Mayes, Nowata, Osage, Ottawa and 4 more	88 min
Jul 5, 3:43 PM CDT	Mesoscale Discussion	SPC	Craig, Delaware, Mayes, Nowata, Ottawa	92 min
Jul 5, 4:21 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Craig, Creek, Delaware, Ellis, Garfield and 19 more	114 min
Jul 5, 4:36 PM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Cimarron, Ellis, Greer, Harmon and 8 more	54 min
Jul 5, 4:40 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Alfalfa, Cherokee, Craig, Delaware, Garfield and 14 more	5 hr
Jul 5, 5:45 PM CDT	Severe Thunderstorm Watch	SPC	Beaver, Blaine, Custer, Dewey, Ellis, Harper and 5 more	6 hr

Nearby

Mesoscale Discussions in Texas, 2004 Mesoscale Discussions in Oklahoma, 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; radar from the NEXRAD Level II archive.