Alert archive / Georgia / Mesoscale Discussions in 2011
Mesoscale Discussion 266
The Storm Prediction Center issued this mesoscale discussion at Mar 23, 2011, 8:21 PM CDT for 4 states. It was in force for 24 min.
The area
The outline as issued.
The facts
- Issued
- Mar 23, 2011, 8:21 PM CDT (01:21 UTC)
- Expired
- Mar 23, 2011, 8:45 PM CDT
- In force
- 24 min
- Issued by
- the Storm Prediction Center
All 31 counties
Jackson County, AL, Catoosa County, GA, Chattooga County, GA, Dade County, GA, Fannin County, GA, Gilmer County, GA, Gordon County, GA, Habersham County, GA, Murray County, GA, Rabun County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Cherokee County, NC, Clay County, NC, Graham County, NC, Haywood County, NC, Jackson County, NC, Macon County, NC, Swain County, NC, Blount County, TN, Bradley County, TN, Hamilton County, TN, Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Polk County, TN, Sevier County, TN
The radar
The Northeast Alabama radar (KHTX), 124 km from the middle of the area, began a volume at 01:24 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 00:00Z, 1.4 hours before the alert went out and 187 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
- 1906 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 266 m²/s²
- 0-3 km storm-relative helicity
- 376 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 |
|---|---|---|---|---|
| Mar 23, 7:39 PM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more | 66 min |
| Mar 23, 8:41 PM CDT | Tornado Watch | SPC | Catoosa, Chattooga, Dade, Fannin, Gilmer, Murray and 4 more | 2 hr |
| Mar 23, 9:26 PM CDT | Mesoscale Discussion | SPC | Alamance, Bertie, Camden, Caswell, Chatham, Chowan and 23 more | 64 min |
Nearby
Mesoscale Discussions in Georgia, 2011Mesoscale Discussions in Tennessee, 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.