Alert archive / Oklahoma / Mesoscale Discussions in 2011
Mesoscale Discussion 1183
The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2011, 2:28 PM CDT for 31 counties in Oklahoma; 18 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 11, 2011, 2:28 PM CDT (19:28 UTC)
- Expired
- Jun 11, 2011, 4:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 49 counties
Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Oklahoma County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 79 km from the middle of the area, began a volume at 19:27 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, 7.5 hours before the alert went out and 127 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.
- Mixed-layer CAPE
- 378 J/kg
- Mixed-layer CIN
- -327 J/kg
- Mixed-layer LCL
- 1551 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 7:47 PM CDT | Mesoscale Discussion | SPC | Blaine, Caddo, Canadian, Craig, Garfield, Kay and 12 more | 58 min |
| Jun 10, 8:50 PM CDT | Mesoscale Discussion | SPC | Caddo, Comanche, Grady, Greer, Harmon, Jackson and 3 more | 55 min |
| Jun 11, 12:44 PM CDT | Mesoscale Discussion | SPC | Beaver, Cimarron, Texas | 91 min |
| Jun 11, 1:09 PM CDT | Severe Thunderstorm Watch | SPC | Cimarron | 7 hr |
| Jun 11, 3:39 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beaver, Beckham, Blaine, Cimarron, Custer and 9 more | 9 hr |
| Jun 11, 4:57 PM CDT | Mesoscale Discussion | SPC | Haskell, Latimer, LeFlore, McIntosh, Sequoyah | 63 min |
| Jun 11, 5:43 PM CDT | Mesoscale Discussion | SPC | Beaver, Blaine, Caddo, Cimarron, Custer, Dewey and 8 more | 62 min |
Nearby
Mesoscale Discussions in Oklahoma, 2011Mesoscale Discussions in Texas, 2011Every 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.