Alert archive / Tennessee / Mesoscale Discussions in 2011
Mesoscale Discussion 2355
The Storm Prediction Center issued this mesoscale discussion at Nov 22, 2011, 12:49 PM CST for 6 counties in Alabama; 6 counties in Georgia; 23 counties in Tennessee. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Nov 22, 2011, 12:49 PM CST (18:49 UTC)
- Expired
- Nov 22, 2011, 2:45 PM CST
- In force
- 116 min
- Issued by
- the Storm Prediction Center
All 35 counties
Blount County, AL, Cherokee County, AL, DeKalb County, AL, Etowah County, AL, Jackson County, AL, Marshall County, AL, Catoosa County, GA, Chattooga County, GA, Dade County, GA, Floyd County, GA, Walker County, GA, Whitfield County, GA, Anderson County, TN, Bledsoe County, TN, Bradley County, TN, Coffee County, TN, Cumberland County, TN, Fentress County, TN, Franklin County, TN, Grundy County, TN, Hamilton County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Morgan County, TN, Overton County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Van Buren County, TN, Warren County, TN, White County, TN
The radar
The Northeast Alabama radar (KHTX), 54 km from the middle of the area, began a volume at 18:52 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 12:00Z, 6.8 hours before the alert went out and 218 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
- 21 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 712 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 69 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 |
|---|---|---|---|---|
| Nov 22, 11:38 AM CST | Mesoscale Discussion | SPC | Autauga, Bibb, Butler, Chilton, Choctaw, Clarke and 18 more | 37 min |
| Nov 22, 11:58 AM CST | Tornado Watch | SPC | Autauga, Barbour, Bibb, Bullock, Butler, Chambers and 28 more | 8 hr |
| Nov 22, 2:40 PM CST | Mesoscale Discussion | SPC | Autauga, Bibb, Butler, Chilton, Choctaw, Clarke and 13 more | 65 min |
| Nov 22, 3:24 PM CST | Mesoscale Discussion | SPC | Barbour, Bullock, Chambers, Clay, Dale, Elmore and 8 more | 2 hr |
| Nov 22, 5:15 PM CST | Tornado Watch | SPC | Baldwin, Bibb, Bleckley, Butts, Chattahoochee, Clayton and 42 more | 5 hr |
Nearby
Mesoscale Discussions in Tennessee, 2011Mesoscale Discussions in Alabama, 2011Mesoscale Discussions in Georgia, 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.