Alert archive / Tennessee / Mesoscale Discussions in 2011
Mesoscale Discussion 126
The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2011, 2:12 PM CST for 5 states. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Feb 24, 2011, 2:12 PM CST (20:12 UTC)
- Expired
- Feb 24, 2011, 3:45 PM CST
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 58 counties
Colbert County, AL, Lauderdale County, AL, Crittenden County, AR, Cross County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, Calloway County, KY, Trigg County, KY, Alcorn County, MS, Benton County, MS, Coahoma County, MS, DeSoto County, MS, Lafayette County, MS, Marshall County, MS, Panola County, MS, Prentiss County, MS, Quitman County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Madison County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Obion County, TN, Perry County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Wayne County, TN, Weakley County, TN, Williamson County, TN
The radar
The Memphis radar (KNQA), 57 km from the middle of the area, began a volume at 20:15 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
Little Rock, AR (KLZK), launched 12:00Z, 8.2 hours before the alert went out and 91 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
- 10 J/kg
- Mixed-layer CIN
- -162 J/kg
- Mixed-layer LCL
- 466 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 201 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
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 |
|---|---|---|---|---|
| Feb 24, 5:26 PM CST | Mesoscale Discussion | SPC | Colbert, Franklin, Lamar, Lauderdale, Lawrence, Marion | 94 min |
| Feb 24, 10:34 AM CST | Mesoscale Discussion | SPC | Garland, Hempstead, Howard, Lafayette, Little River, Miller and 7 more | 56 min |
| Feb 24, 11:25 AM CST | Tornado Watch | SPC | Bradley, Calhoun, Clark, Cleburne, Cleveland, Columbia and 38 more | 9 hr |
| Feb 24, 2:34 PM CST | Tornado Watch | SPC | Arkansas, Ashley, Chicot, Clay, Craighead, Crittenden and 14 more | 7 hr |
| Feb 24, 2:39 PM CST | Mesoscale Discussion | SPC | Bradley, Calhoun, Clark, Cleburne, Cleveland, Columbia and 31 more | 66 min |
| Feb 24, 5:54 PM CST | Tornado Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 14 more | 4 hr |
Nearby
Mesoscale Discussions in Tennessee, 2011Mesoscale Discussions in Mississippi, 2011Mesoscale Discussions in Arkansas, 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.