Alert archive / Oklahoma / Mesoscale Discussions in 2011

Mesoscale Discussion 1038

May 30, 201116 counties in Oklahoma; 14 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 30, 2011, 11:39 PM CDT for 16 counties in Oklahoma; 14 counties in Texas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: May 30, 2011, 11:39 PM CDT (04:39 UTC)
Expired: May 31, 2011, 1:15 AM CDT
In force: 96 min
Issued by: the Storm Prediction Center

All 30 counties

Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Foard County, TX, Garza County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Lipscomb County, TX, Motley County, TX, Wheeler County, TX

The radar

The Altus AFB radar (KFDR), 126 km from the middle of the area, began a volume at 04:42 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, 4.7 hours before the alert went out and 142 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: 5082 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 87 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
May 31, 3:31 PM CDT	Mesoscale Discussion	SPC	Cochran, Crosby, Culberson, Gaines, Hale, Hockley and 8 more	119 min
May 31, 5:05 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Armstrong, Bailey, Briscoe, Castro, Childress and 27 more	6 hr

Nearby

Mesoscale Discussions in Oklahoma, 2011 Mesoscale Discussions in Texas, 2011 Every mesoscale discussion in 2011

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.