Alert archive / Tennessee / Mesoscale Discussions in 2012
Mesoscale Discussion 223
The Storm Prediction Center issued this mesoscale discussion at Mar 2, 2012, 8:15 PM EST for 4 states. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Mar 2, 2012, 8:15 PM EST (01:15 UTC)
- Expired
- Mar 2, 2012, 9:45 PM EST
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 56 counties
Catoosa County, GA, Dade County, GA, Fannin County, GA, Gilmer County, GA, Murray County, GA, Rabun County, GA, Towns County, GA, Union County, GA, Walker County, GA, Whitfield County, GA, Avery County, NC, Buncombe County, NC, Cherokee County, NC, Clay County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, Mitchell County, NC, Swain County, NC, Transylvania County, NC, Watauga County, NC, Yancey County, NC, Oconee County, SC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Cumberland County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hamilton County, TN, Hawkins County, TN, Jefferson County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Sequatchie County, TN, Sevier County, TN, Unicoi County, TN, Union County, TN, Washington County, TN
The radar
The Knoxville radar (KMRX), 110 km from the middle of the area, began a volume at 01:19 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, 1.3 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
- 262 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 1382 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 150 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
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 |
|---|---|---|---|---|
| Mar 2, 8:18 PM EST | Mesoscale Discussion | SPC | Dade | 57 min |
| Mar 2, 9:36 PM EST | Mesoscale Discussion | SPC | Baker, Calhoun, Colquitt, Cook, Decatur, Dougherty and 6 more | 54 min |
| Mar 2, 10:54 PM EST | Tornado Watch | SPC | Banks, Barrow, Bartow, Butts, Carroll, Catoosa and 61 more | 6 hr |
| Mar 2, 11:07 PM EST | Mesoscale Discussion | SPC | Carroll, Clayton, Cobb, Coweta, DeKalb, Douglas and 13 more | 113 min |
| Mar 3, 12:40 AM EST | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Carroll, Cherokee, Clarke and 30 more | 95 min |
| Mar 3, 3:58 AM EST | Mesoscale Discussion | SPC | Burke, Columbia, Glascock, Jefferson, Jenkins, Lincoln and 6 more | 92 min |
| Mar 3, 4:39 AM EST | Severe Thunderstorm Watch | SPC | Burke, Columbia, Lincoln, McDuffie, Richmond | 4 hr |
| Mar 3, 5:47 AM EST | Mesoscale Discussion | SPC | Baker, Berrien, Brooks, Calhoun, Clay, Colquitt and 18 more | 58 min |
| Mar 3, 7:35 AM EST | Tornado Watch | SPC | Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 49 more | 6 hr |
| Mar 3, 10:12 AM EST | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Berrien, Brantley, Brooks and 24 more | 93 min |
| Mar 3, 12:45 PM EST | Mesoscale Discussion | SPC | Brantley, Brooks, Camden, Charlton, Clinch, Echols and 3 more | 60 min |
| Mar 3, 1:04 PM EST | Tornado Watch | SPC | Atkinson, Brantley, Brooks, Camden, Charlton, Clinch and 12 more | 5 hr |
| Mar 3, 4:30 PM EST | Mesoscale Discussion | SPC | Charlton | 90 min |
Nearby
Mesoscale Discussions in Tennessee, 2012Mesoscale Discussions in North Carolina, 2012Mesoscale Discussions in Georgia, 2012Every mesoscale discussion in 2012
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.