Alert archive / Texas / Mesoscale Discussions in 2011
Mesoscale Discussion 728
The Storm Prediction Center issued this mesoscale discussion at May 11, 2011, 7:30 AM CDT for Meade County, Seward County, Stevens County, Kansas; 6 counties in Oklahoma; 49 counties in Texas. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- May 11, 2011, 7:30 AM CDT (12:30 UTC)
- Expired
- May 11, 2011, 8:30 AM CDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
All 58 counties
Meade County, KS, Seward County, KS, Stevens County, KS, Beaver County, OK, Beckham County, OK, Ellis County, OK, Harmon County, OK, Harper County, OK, Roger Mills County, OK, Armstrong County, TX, Borden County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Coke County, TX, Collingsworth County, TX, Concho County, TX, Cottle County, TX, Crockett County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Glasscock County, TX, Gray County, TX, Hall County, TX, Hansford County, TX, Hardeman County, TX, Haskell County, TX, Hemphill County, TX, Howard County, TX, Hutchinson County, TX, Irion County, TX, Jones County, TX, Kent County, TX, Kimble County, TX, King County, TX, Knox County, TX, Lipscomb County, TX, Menard County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Ochiltree County, TX, Reagan County, TX, Roberts County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Sterling County, TX, Stonewall County, TX, Sutton County, TX, Taylor County, TX, Tom Green County, TX, Wheeler County, TX
The radar
The Lubbock radar (KLBB), 106 km from the middle of the area, began a volume at 12:30 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.
The nearest sounding before it
Midland Regional, TX (KMAF), launched 12:00Z, 0.5 hours before the alert went out and 218 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3941 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -132 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| May 11, 11:21 AM CDT | Mesoscale Discussion | SPC | Butler, Chase, Clay, Cloud, Coffey, Dickinson and 22 more | 84 min |
| May 11, 12:16 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Anderson, Brown, Butler, Chase, Chautauqua and 48 more | 5 hr |
| May 11, 1:51 PM CDT | Mesoscale Discussion | SPC | Clark, Comanche, Edwards, Finney, Ford, Gove and 25 more | 84 min |
| May 11, 3:57 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Bourbon, Brown, Cherokee and 25 more | 48 min |
| May 11, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Anderson, Atchison, Bourbon, Brown, Chautauqua and 24 more | 8 hr |
| May 11, 4:52 PM CDT | Tornado Watch | SPC | Cheyenne, Decatur, Gove, Graham, Logan, Norton and 7 more | 6 hr |
| May 11, 6:02 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Comanche, Edwards, Ellis and 9 more | 88 min |
| May 11, 6:35 PM CDT | Mesoscale Discussion | SPC | Cherokee, Labette | 55 min |
| May 11, 2:28 AM CDT | Mesoscale Discussion | SPC | Texas | 92 min |
| May 11, 12:33 PM CDT | Mesoscale Discussion | SPC | Atoka, Coal, Creek, Haskell, Hughes, Johnston and 19 more | 87 min |
| May 11, 1:16 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Atoka, Bryan, Caddo, Canadian, Carter and 53 more | 8 hr |
| May 11, 2:51 PM CDT | Mesoscale Discussion | SPC | McCurtain | 84 min |
| May 11, 3:46 PM CDT | Severe Thunderstorm Watch | SPC | McCurtain | 8 hr |
| May 11, 3:29 AM CDT | Severe Thunderstorm Watch | SPC | Andrews, Armstrong, Bailey, Borden, Briscoe, Carson and 46 more | 8 hr |
| May 11, 9:56 AM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Callahan, Coleman, Comanche, Concho and 20 more | 94 min |
| May 11, 10:21 AM CDT | Severe Thunderstorm Watch | SPC | Bell, Bosque, Brown, Burnet, Callahan, Coleman and 52 more | 5 hr |
Nearby
Mesoscale Discussions in Texas, 2011Mesoscale Discussions in Oklahoma, 2011Mesoscale Discussions in Kansas, 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.