Alert archive / Georgia / Mesoscale Discussions in 2008
Mesoscale Discussion 957
The Storm Prediction Center issued this mesoscale discussion at May 20, 2008, 6:19 PM CDT for 4 states. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- May 20, 2008, 6:19 PM CDT (23:19 UTC)
- Expired
- May 20, 2008, 7:45 PM CDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
All 94 counties
Bibb County, AL, Blount County, AL, Calhoun County, AL, Chambers County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Fayette County, AL, Jefferson County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL, Baldwin County, GA, Banks County, GA, Barrow County, GA, Butts County, GA, Carroll County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Columbia County, GA, Coweta County, GA, DeKalb County, GA, Douglas County, GA, Elbert County, GA, Fayette County, GA, Franklin County, GA, Fulton County, GA, Glascock County, GA, Greene County, GA, Gwinnett County, GA, Hancock County, GA, Haralson County, GA, Hart County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Jefferson County, GA, Jones County, GA, Lamar County, GA, Lincoln County, GA, Madison County, GA, McDuffie County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Pike County, GA, Polk County, GA, Putnam County, GA, Richmond County, GA, Rockdale County, GA, Spalding County, GA, Taliaferro County, GA, Troup County, GA, Walton County, GA, Warren County, GA, Washington County, GA, Wilkes County, GA, Anson County, NC, Hoke County, NC, Richmond County, NC, Scotland County, NC, Union County, NC, Abbeville County, SC, Aiken County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Darlington County, SC, Edgefield County, SC, Fairfield County, SC, Greenwood County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marlboro County, SC, McCormick County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC
The radar
The Atlanta radar (KFFC), 119 km from the middle of the area, began a volume at 23:20 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.3 hours before the alert went out and 114 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
- 572 J/kg
- Mixed-layer CIN
- -199 J/kg
- Mixed-layer LCL
- 979 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 225 m²/s²
- 0-3 km storm-relative helicity
- 251 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
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 20, 3:00 PM CDT | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Clay, Cleburne, Cullman and 17 more | 60 min |
| May 20, 3:31 PM CDT | Severe Thunderstorm Watch | SPC | Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 20 more | 6 hr |
| May 20, 1:23 PM CDT | Mesoscale Discussion | SPC | Baldwin, Bibb, Burke, Butts, Clayton, Columbia and 38 more | 67 min |
| May 20, 1:59 PM CDT | Severe Thunderstorm Watch | SPC | Baldwin, Banks, Barrow, Bartow, Burke, Butts and 70 more | 7 hr |
| May 20, 2:39 PM CDT | Tornado Watch | SPC | Jenkins, Screven | 7 hr |
| May 20, 11:34 AM CDT | Mesoscale Discussion | SPC | Caswell, Northampton, Person, Vance, Warren | 56 min |
| May 20, 12:09 PM CDT | Severe Thunderstorm Watch | SPC | Alamance, Alexander, Alleghany, Anson, Bertie, Burke and 54 more | 7 hr |
| May 20, 2:23 PM CDT | Mesoscale Discussion | SPC | Bladen, Brunswick, Columbus, Craven, Duplin, Greene and 7 more | 37 min |
| May 20, 3:38 PM CDT | Mesoscale Discussion | SPC | Alamance, Bertie, Cabarrus, Camden, Chatham, Chowan and 22 more | 67 min |
Nearby
Mesoscale Discussions in Georgia, 2008Mesoscale Discussions in South Carolina, 2008Mesoscale Discussions in Alabama, 2008Every mesoscale discussion in 2008
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.