Alert archive / Tennessee / Mesoscale Discussions in 2012
Mesoscale Discussion 214
The Storm Prediction Center issued this mesoscale discussion at Mar 2, 2012, 2:58 PM EST for 20 counties in Georgia; 9 counties in North Carolina; 27 counties in Tennessee. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- Mar 2, 2012, 2:58 PM EST (19:58 UTC)
- Expired
- Mar 2, 2012, 4:00 PM EST
- In force
- 62 min
- Issued by
- the Storm Prediction Center
All 56 counties
Bartow County, GA, Catoosa County, GA, Cherokee County, GA, Dawson County, GA, Fannin County, GA, Forsyth County, GA, Gilmer County, GA, Gordon County, GA, Habersham County, GA, Hall County, GA, Lumpkin County, GA, Murray County, GA, Pickens County, GA, Rabun County, GA, Stephens 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, Madison County, NC, Swain County, NC, Transylvania County, NC, Anderson County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Knox County, TN, Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington County, TN
The radar
The Knoxville radar (KMRX), 98 km from the middle of the area, began a volume at 20:01 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, 8.0 hours before the alert went out and 229 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
- 55 J/kg
- Mixed-layer CIN
- -255 J/kg
- Mixed-layer LCL
- 788 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 206 m²/s²
- 0-3 km storm-relative helicity
- 268 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
114
ACUS11 KWNS 021958
SWOMCD
SPC MCD 021958
TNZ000-NCZ000-VAZ000-SCZ000-GAZ000-022100-
MESOSCALE DISCUSSION 0214
NWS STORM PREDICTION CENTER NORMAN OK
0158 PM CST FRI MAR 02 2012
AREAS AFFECTED...FAR WRN NC AND NWRN SC...NRN GA...ERN TN
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 021958Z - 022100Z
THE POTENTIAL FOR DMGG WINDS...LARGE HAIL...AND PERHAPS A TORNADO OR
TWO WILL EXIST THIS AFTERNOON/EVENING ACROSS PORTIONS OF THE SRN
APPALACHIANS. CONVECTIVE TRENDS ARE BEING MONITORED FOR A POSSIBLE
WW.
SFC ANALYSIS FROM 19Z SHOWS A NEARLY STATIONARY BAROCLINIC ZONE
ORIENTED E-W ACROSS FAR NWRN SC...ARCING BACK TOWARDS THE NE ALONG
NEAR THE WRN SLOPES OF THE SRN APPALACHIAN MTNS. A LONE WEAKENING
SUPERCELL WAS NOTED ON 1950Z RADAR IMAGERY MOVING EWD ACROSS SWAIN
COUNTY NC. THIS STORM IS CURRENTLY NEAR THE BAROCLINIC ZONE AND WILL
EVENTUALLY ENCOUNTER A PROGRESSIVELY COOLER/MORE STABLE AIR MASS.
FARTHER S/W...BREAKS IN CLOUDINESS HAVE ALLOWED AMPLE SFC HEATING TO
OCCUR OVER PARTS OF NRN GA AND ERN TN...WITH THE ENVIRONMENT
BECOMING MODERATELY UNSTABLE AND WEAKLY CAPPED. WEAK ECHOES HAVE
BEEN NOTED ON RADAR RECENTLY AS WAA HAS INCREASED WITHIN A BROAD
LLJ. BACKGROUND FLOW FIELDS REMAIN QUITE STRONG AND FAVORABLE FOR
ROTATING STORMS...WITH FFC VWP DATA SHOWING A STRONG CYCLONICALLY
CURVED HODOGRAPH. PRIMARY UNCERTAINTY REMAINS CONVECTIVE COVERAGE
GIVEN ABSENCE OF STRONG LARGE-SCALE FORCING...BUT CONVECTIVE TRENDS
WILL BE MONITORED FOR A POSSIBLE WW.
..ROGERS.. 03/02/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...GSP...MRX...FFC...OHX...
LAT...LON 35938244 35128280 34528329 34128403 34168495 34388535
34778533 36438457 36638327 36518219 35938244SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 2, 3:30 AM EST | Mesoscale Discussion | SPC | Banks, Dawson, Fannin, Franklin, Gilmer, Habersham and 8 more | 90 min |
| Mar 2, 10:07 AM EST | Mesoscale Discussion | SPC | Catoosa, Chattooga, Dade, Murray, Walker, Whitfield | 53 min |
| Mar 2, 10:25 AM EST | Tornado Watch | SPC | Catoosa, Chattooga, Dade, Walker, Whitfield | 5 hr |
| Mar 2, 12:46 PM EST | Mesoscale Discussion | SPC | Bartow, Catoosa, Chattooga, Dade, Fannin, Floyd and 6 more | 29 min |
| Mar 2, 3:19 PM EST | Tornado Watch | SPC | Banks, Bartow, Catoosa, Chattooga, Cherokee, Dade and 23 more | 8 hr |
| Mar 2, 5:37 PM EST | Tornado Watch | SPC | Carroll, Clayton, Cobb, Coweta, DeKalb, Douglas and 11 more | 7 hr |
| Mar 2, 6:41 PM EST | Mesoscale Discussion | SPC | Barrow, Bartow, Butts, Carroll, Catoosa, Chattahoochee and 42 more | 2 hr |
| Mar 2, 4:40 AM EST | Mesoscale Discussion | SPC | Clay, Fentress, Overton, Pickett, Scott | 65 min |
| Mar 2, 10:22 AM EST | Mesoscale Discussion | SPC | Benton, Carroll, Cheatham, Chester, Crockett, Davidson and 28 more | 113 min |
| Mar 2, 11:28 AM EST | Mesoscale Discussion | SPC | Crockett, Dyer, Fayette, Gibson, Haywood, Lake and 5 more | 62 min |
| Mar 2, 1:05 PM EST | Mesoscale Discussion | SPC | Benton, Carroll, Cheatham, Chester, Crockett, Davidson and 28 more | 85 min |
| Mar 2, 2:20 PM EST | Tornado Watch | SPC | Bedford, Benton, Cannon, Carroll, Cheatham, Chester and 50 more | 9 hr |
| Mar 2, 3:35 PM EST | Mesoscale Discussion | SPC | Clay, Macon, Pickett, Sumner | 85 min |
| Mar 2, 4:25 PM EST | Mesoscale Discussion | SPC | Bedford, Benton, Cannon, Carroll, Cheatham, Chester and 44 more | 65 min |
Nearby
Mesoscale Discussions in Tennessee, 2012Mesoscale Discussions in Georgia, 2012Mesoscale Discussions in North Carolina, 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.