Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 2598

December 12, 200321 counties in Oklahoma; 4 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Dec 12, 2003, 11:28 AM CST for 21 counties in Oklahoma; 4 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Dec 12, 2003, 11:28 AM CST (17:28 UTC)
Expired: Dec 12, 2003, 2:30 PM CST
In force: 3 hr
Issued by: the Storm Prediction Center

All 25 counties

Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, Major County, OK, Oklahoma County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Collingsworth County, TX, Hemphill County, TX, Lipscomb County, TX, Wheeler County, TX

The radar

The Vance AFB radar (KVNX), 118 km from the middle of the area, began a volume at 17:30 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

Norman, OK (KOUN), launched 12:00Z, 5.5 hours before the alert went out and 182 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1011 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 285 m²/s²
0-3 km storm-relative helicity: 273 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Dec 12, 10:57 AM CST	Mesoscale Discussion	SPC	Beaver, Texas	3 hr
Dec 12, 2:24 PM CST	Mesoscale Discussion	SPC	Alfalfa, Blaine, Canadian, Garfield, Grant, Kay and 4 more	3 hr
Dec 12, 5:57 PM CST	Mesoscale Discussion	SPC	Alfalfa, Caddo, Canadian, Cleveland, Comanche, Craig and 17 more	6 hr
Dec 12, 12:11 PM CST	Mesoscale Discussion	SPC	Aransas, Brazoria, Calhoun, Goliad, Jackson, Matagorda and 4 more	2 hr
Dec 12, 3:48 PM CST	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Brazoria, Brazos, Burleson and 43 more	117 min

Nearby

Mesoscale Discussions in Oklahoma, 2003 Mesoscale Discussions in Texas, 2003 Every mesoscale discussion in 2003

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.