Alert archive / Georgia / Mesoscale Discussions in 2006
Mesoscale Discussion 586
The Storm Prediction Center issued this mesoscale discussion at Apr 20, 2006, 3:40 PM CDT for 31 counties in Alabama; 47 counties in Georgia; 11 counties in Tennessee. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 20, 2006, 3:40 PM CDT (20:40 UTC)
- Expired
- Apr 20, 2006, 5:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 89 counties
Bibb County, AL, Blount County, AL, Calhoun County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Colbert County, AL, Coosa 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, Pickens County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Barrow County, GA, Bartow County, GA, Butts County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dade 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, Heard County, GA, Henry County, GA, Jackson County, GA, Lamar County, GA, Lumpkin County, GA, Meriwether County, GA, Monroe County, GA, Murray County, GA, Newton County, GA, Paulding County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Rockdale County, GA, Spalding County, GA, Towns County, GA, Troup County, GA, Union County, GA, Walker County, GA, Walton County, GA, White County, GA, Whitfield County, GA, Franklin County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Lawrence County, TN, Lincoln County, TN, Marion County, TN, Marshall County, TN, Moore County, TN, Sequatchie County, TN, Wayne County, TN
The radar
The Northeast Alabama radar (KHTX), 64 km from the middle of the area, began a volume at 20:43 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, 8.7 hours before the alert went out and 163 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1516 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- -19 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 |
|---|---|---|---|---|
| Apr 19, 7:51 PM CDT | Mesoscale Discussion | SPC | Autauga, Barbour, Bibb, Bullock, Butler, Chilton and 20 more | 84 min |
| Apr 20, 11:19 AM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Cherokee, Clay, Cleburne and 24 more | 86 min |
| Apr 20, 11:38 AM CDT | Severe Thunderstorm Watch | SPC | Blount, Calhoun, Cherokee, Colbert, Cullman, DeKalb and 20 more | 7 hr |
| Apr 20, 1:38 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Cherokee, Clay, Colbert and 22 more | 2 hr |
| Apr 20, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | Chambers, Clay, Cleburne, Coosa, Randolph, Tallapoosa | 6 hr |
| Apr 20, 6:11 PM CDT | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Clay, Cleburne, Colbert and 19 more | 2 hr |
| Apr 20, 6:57 PM CDT | Severe Thunderstorm Watch | SPC | Bibb, Blount, Calhoun, Cherokee, Chilton, Colbert and 22 more | 5 hr |
| Apr 20, 1:53 PM CDT | Mesoscale Discussion | SPC | Banks, Dawson, Fannin, Forsyth, Franklin, Gilmer and 9 more | 2 hr |
| Apr 20, 4:22 AM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Cheatham, Chester, Crockett, Davidson and 27 more | 113 min |
| Apr 20, 11:24 AM CDT | Mesoscale Discussion | SPC | Anderson, Blount, Campbell, Carter, Claiborne, Cocke and 19 more | 2 hr |
| Apr 20, 4:15 PM CDT | Mesoscale Discussion | SPC | Chester, Crockett, Fayette, Hardeman, Hardin, Haywood and 3 more | 2 hr |
Nearby
Mesoscale Discussions in Georgia, 2006Mesoscale Discussions in Alabama, 2006Mesoscale Discussions in Tennessee, 2006Every mesoscale discussion in 2006
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.