Alert archive / Oklahoma / Mesoscale Discussions in 2005

Mesoscale Discussion 1307

June 12, 200514 counties in Oklahoma; Hemphill County, Wheeler County, Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2005, 10:08 AM CDT for 14 counties in Oklahoma; Hemphill County, Wheeler County, Texas. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Jun 12, 2005, 10:08 AM CDT (15:08 UTC)
Expired: Jun 12, 2005, 11:15 AM CDT
In force: 67 min
Issued by: the Storm Prediction Center

Counties Beckham County, OK, Blaine County, OK, Canadian County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Kingfisher County, OK, Logan County, OK, Major County, OK, Noble County, OK, Roger Mills County, OK, Washita County, OK, Woodward County, OK, Hemphill County, TX, Wheeler County, TX

The radar

The Vance AFB radar (KVNX), 136 km from the middle of the area, began a volume at 15:09 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 12:00Z, 3.1 hours before the alert went out and 159 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: 1489 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1069 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.1

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 11, 8:27 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 9 more	33 min
Jun 11, 10:11 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beaver, Beckham, Blaine, Custer, Dewey and 10 more	64 min
Jun 12, 5:03 AM CDT	Mesoscale Discussion	SPC	Beaver, Harper, Texas	2 hr
Jun 12, 5:30 AM CDT	Severe Thunderstorm Watch	SPC	Beaver, Cimarron, Texas	6 hr
Jun 12, 9:03 AM CDT	Mesoscale Discussion	SPC	Cotton, Jefferson, Tillman	57 min
Jun 12, 11:35 AM CDT	Mesoscale Discussion	SPC	Greer, Harmon	85 min
Jun 12, 12:20 PM CDT	Tornado Watch	SPC	Beckham, Blaine, Caddo, Comanche, Cotton, Custer and 8 more	10 hr
Jun 12, 12:38 PM CDT	Mesoscale Discussion	SPC	Garfield, Kay, Noble, Nowata, Osage, Pawnee and 2 more	67 min
Jun 12, 1:20 PM CDT	Tornado Watch	SPC	Canadian, Garfield, Grant, Kay, Kingfisher, Logan and 7 more	9 hr
Jun 12, 3:02 PM CDT	Mesoscale Discussion	SPC	Craig, Creek, Delaware, Mayes, Ottawa, Rogers and 2 more	58 min
Jun 12, 3:29 PM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Comanche, Cotton, Custer and 8 more	91 min
Jun 12, 3:47 PM CDT	Mesoscale Discussion	SPC	Cimarron, Texas	88 min
Jun 12, 5:41 PM CDT	Mesoscale Discussion	SPC	Caddo, Canadian, Cleveland, Comanche, Cotton, Creek and 14 more	2 hr
Jun 12, 6:05 PM CDT	Tornado Watch	SPC	Adair, Carter, Cherokee, Cleveland, Creek, Delaware and 20 more	5 hr
Jun 12, 6:13 PM CDT	Mesoscale Discussion	SPC	Delaware, Mayes, Ottawa	2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2005 Mesoscale Discussions in Texas, 2005 Every mesoscale discussion in 2005

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.