Alert archive / Mississippi / Mesoscale Discussions in 2011
Mesoscale Discussion 133
The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2011, 8:11 PM CST for 4 states. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- Feb 24, 2011, 8:11 PM CST (02:11 UTC)
- Expired
- Feb 24, 2011, 9:15 PM CST
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 64 counties
Colbert County, AL, Fayette County, AL, Franklin County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Marion County, AL, Pickens County, AL, Winston County, AL, Madison Parish, LA, Alcorn County, MS, Attala County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clay County, MS, Copiah County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Itawamba County, MS, Kemper County, MS, Lafayette County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pontotoc County, MS, Prentiss County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Warren County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Giles County, TN, Hardin County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Perry County, TN, Wayne County, TN
The radar
The Columbus AFB radar (KGWX), 95 km from the middle of the area, began a volume at 02:12 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
Jackson, MS (KJAN), launched 00:00Z, 2.2 hours before the alert went out and 148 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
- 58 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 1389 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 251 m²/s²
- 0-3 km storm-relative helicity
- 420 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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, 8:30 PM CST | Tornado Watch | SPC | Bibb, Blount, Calhoun, Cherokee, Clay, Cleburne and 27 more | 6 hr |
| Feb 24, 10:38 PM CST | Mesoscale Discussion | SPC | Colbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 4 more | 97 min |
| Feb 25, 1:35 AM CST | Mesoscale Discussion | SPC | Autauga, Chambers, Clay, Cleburne, Coosa, Elmore and 4 more | 55 min |
| Feb 24, 7:22 PM CST | Mesoscale Discussion | SPC | Clay, Macon, Montgomery, Pickett, Robertson, Stewart | 83 min |
| Feb 24, 7:41 PM CST | Tornado Watch | SPC | Bedford, Benton, Cannon, Cheatham, Clay, Coffee and 33 more | 5 hr |
| Feb 24, 10:59 PM CST | Severe Thunderstorm Watch | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 19 more | 5 hr |
| Feb 25, 12:48 AM CST | Mesoscale Discussion | SPC | Carter, Claiborne, Cocke, Grainger, Greene, Hamblen and 9 more | 27 min |
Nearby
Mesoscale Discussions in Mississippi, 2011Mesoscale Discussions in Alabama, 2011Mesoscale Discussions in Tennessee, 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.