Alert archive / Georgia / Mesoscale Discussions in 2011
Mesoscale Discussion 1848
The Storm Prediction Center issued this mesoscale discussion at Aug 4, 2011, 1:25 AM CDT for 4 states. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Aug 4, 2011, 1:25 AM CDT (06:25 UTC)
- Expired
- Aug 4, 2011, 3:00 AM CDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
All 72 counties
Blount County, AL, Calhoun County, AL, Cherokee County, AL, Cleburne County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, St. Clair County, AL, Talladega County, AL, Walker County, AL, Winston County, AL, Banks County, GA, Barrow County, GA, Bartow County, GA, Carroll County, GA, Chattooga County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gordon County, GA, Gwinnett County, GA, Hall County, GA, Haralson County, GA, Jackson County, GA, Lumpkin County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Rockdale County, GA, Walker County, GA, Walton County, GA, Alcorn County, MS, Benton County, MS, Itawamba County, MS, Lee County, MS, Marshall County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Chester County, TN, Crockett County, TN, Decatur County, TN, Fayette County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Lawrence County, TN, Madison County, TN, McNairy County, TN, Wayne County, TN
The radar
The Northeast Alabama radar (KHTX), 85 km from the middle of the area, began a volume at 06:27 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
Nashville Metro, TN (KBNA), launched 00:00Z, 6.4 hours before the alert went out and 159 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
- 5553 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 1715 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 130 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 |
|---|---|---|---|---|
| Aug 3, 10:52 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Cherokee, Cleburne, Colbert and 23 more | 83 min |
| Aug 3, 11:59 PM CDT | Severe Thunderstorm Watch | SPC | Bibb, Blount, Calhoun, Cherokee, Clay, Cleburne and 24 more | 7 hr |
| Aug 4, 12:09 PM CDT | Mesoscale Discussion | SPC | Butler, Choctaw, Clarke, Coffee, Conecuh, Covington and 8 more | 66 min |
| Aug 4, 3:06 PM CDT | Mesoscale Discussion | SPC | Colbert, Fayette, Franklin, Lamar, Marion, Pickens | 54 min |
| Aug 4, 3:41 PM CDT | Severe Thunderstorm Watch | SPC | Fayette, Greene, Lamar, Marion, Pickens, Sumter | 5 hr |
| Aug 4, 6:06 PM CDT | Mesoscale Discussion | SPC | Colbert, Fayette, Franklin, Greene, Lamar, Lauderdale and 3 more | 54 min |
| Aug 4, 1:41 AM CDT | Severe Thunderstorm Watch | SPC | Baldwin, Banks, Barrow, Bartow, Bibb, Butts and 47 more | 3 hr |
| Aug 4, 8:06 AM CDT | Severe Thunderstorm Watch | SPC | Alcorn, Benton, DeSoto, Itawamba, Lee, Marshall and 5 more | 4 hr |
| Aug 4, 10:21 AM CDT | Mesoscale Discussion | SPC | Carroll, Chester, Crockett, Dyer, Fayette, Gibson and 10 more | 84 min |
Nearby
Mesoscale Discussions in Georgia, 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.