Alert archive / Georgia / Mesoscale Discussions in 2011
Mesoscale Discussion 137
The Storm Prediction Center issued this mesoscale discussion at Feb 25, 2011, 1:35 AM CST for 4 states. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Feb 25, 2011, 1:35 AM CST (07:35 UTC)
- Expired
- Feb 25, 2011, 2:30 AM CST
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 55 counties
Autauga County, AL, Chambers County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Elmore County, AL, Lee County, AL, Macon County, AL, Randolph County, AL, Tallapoosa County, AL, Bartow County, GA, Carroll County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Lumpkin County, GA, Meriwether County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Rabun County, GA, Rockdale County, GA, Spalding County, GA, Towns County, GA, Troup County, GA, Union County, GA, White County, GA, Cherokee County, NC, Clay County, NC, Graham County, NC, Macon County, NC, Swain County, NC, Blount County, TN, Monroe County, TN, Polk County, TN
The radar
The Atlanta radar (KFFC), 98 km from the middle of the area, began a volume at 07:35 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
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 7.6 hours before the alert went out and 99 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
- 2 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 1511 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 274 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 |
|---|---|---|---|---|
| Feb 24, 8:11 PM CST | Mesoscale Discussion | SPC | Colbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 4 more | 64 min |
| 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 24, 10:59 PM CST | Severe Thunderstorm Watch | SPC | Bartow, Carroll, Catoosa, Chattooga, Cherokee, Clayton and 27 more | 5 hr |
| Feb 25, 12:48 AM CST | Mesoscale Discussion | SPC | Alleghany, Ashe, Avery, Caldwell, Madison, Mitchell and 3 more | 27 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 |
Nearby
Mesoscale Discussions in Georgia, 2011Mesoscale Discussions in Alabama, 2011Mesoscale Discussions in North Carolina, 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.