Alert archive / Oklahoma / Mesoscale Discussions in 2013

Mesoscale Discussion 952

June 4, 201317 counties in Oklahoma; Childress County, Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2013, 3:30 AM CDT for 17 counties in Oklahoma; Childress County, Texas. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jun 4, 2013, 3:30 AM CDT (08:30 UTC)
Expired: Jun 4, 2013, 5:00 AM CDT
In force: 90 min
Issued by: the Storm Prediction Center

Counties Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, McClain County, OK, Murray County, OK, Oklahoma County, OK, Pottawatomie County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Childress County, TX

The radar

The Altus AFB radar (KFDR), 88 km from the middle of the area, began a volume at 08:30 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 watches that followed

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

Severe Thunderstorm Watch 275Jun 4, 3:45 AM CDT

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 8.5 hours before the alert went out and 103 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: 2143 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 244 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
Jun 3, 10:08 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beaver, Beckham, Blaine, Caddo, Cimarron and 16 more	67 min
Jun 3, 10:41 PM CDT	Severe Thunderstorm Watch	SPC	Beckham, Blaine, Caddo, Comanche, Custer, Dewey and 9 more	5 hr
Jun 4, 1:22 AM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Custer, Dewey, Ellis and 3 more	83 min
Jun 4, 3:44 AM CDT	Severe Thunderstorm Watch	SPC	Atoka, Bryan, Caddo, Canadian, Carter, Cleveland and 25 more	5 hr
Jun 4, 6:50 AM CDT	Mesoscale Discussion	SPC	Carter, Coal, Johnston, Love, Marshall	55 min
Jun 4, 3:40 PM CDT	Mesoscale Discussion	SPC	Cimarron	95 min
Jun 4, 5:06 PM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Comanche, Cotton, Custer, Dewey and 12 more	54 min
Jun 4, 5:39 PM CDT	Severe Thunderstorm Watch	SPC	Beaver, Beckham, Cimarron, Comanche, Cotton, Custer and 12 more	6 hr
Jun 4, 2:24 PM CDT	Mesoscale Discussion	SPC	Callahan, Coke, Concho, Crockett, Fisher, Haskell and 16 more	96 min

Nearby

Mesoscale Discussions in Oklahoma, 2013 Mesoscale Discussions in Texas, 2013 Every mesoscale discussion in 2013

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.