Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 200
The Storm Prediction Center issued this mesoscale discussion at Mar 2, 2012, 3:30 AM EST for 4 states. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Mar 2, 2012, 3:30 AM EST (08:30 UTC)
- Expired
- Mar 2, 2012, 5:00 AM EST
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 40 counties
Banks County, GA, Dawson County, GA, Fannin County, GA, Franklin County, GA, Gilmer County, GA, Habersham County, GA, Hart County, GA, Lumpkin County, GA, Murray County, GA, Rabun County, GA, Stephens County, GA, Towns County, GA, Union County, GA, White County, GA, Cherokee County, NC, Clay County, NC, Graham County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Polk County, NC, Transylvania County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Laurens County, SC, Newberry County, SC, Oconee County, SC, Pickens County, SC, Spartanburg County, SC, Union County, SC, York County, SC, Bradley County, TN, McMinn County, TN, Monroe County, TN, Polk County, TN
The radar
The Greer radar (KGSP), 88 km from the middle of the area, began a volume at 08:33 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 00:00Z, 8.5 hours before the alert went out and 201 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
- 580 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 837 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 195 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.6
The text
As transmitted, in the capitals the NWS used until 2016.
151
ACUS11 KWNS 020830
SWOMCD
SPC MCD 020830
SCZ000-NCZ000-GAZ000-TNZ000-021000-
MESOSCALE DISCUSSION 0200
NWS STORM PREDICTION CENTER NORMAN OK
0230 AM CST FRI MAR 02 2012
AREAS AFFECTED...FAR SE TN...NE GA...NW SC...WRN NC
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 020830Z - 021000Z
AN ISOLATED HAIL THREAT IS EXPECTED TO DEVELOP OVER THE NEXT FEW
HOURS ACROSS THE SRN APPALACHIAN MTNS. THE THREAT SHOULD REMAIN
MARGINAL AND WW ISSUANCE IS NOT ANTICIPATED.
THUNDERSTORMS ARE BEGINNING TO INCREASE IN COVERAGE ALONG A WARM
FRONT ORIENTED FROM WNW TO ESE FROM MIDDLE TN INTO CNTRL SC. THE
ACTIVITY IS DEVELOPING ALONG THE NRN EDGE OF INSTABILITY WITH
FORECAST SOUNDINGS SHOWING MUCAPE VALUES AROUND 500 J/KG. THE
INSTABILITY IS LOCATED MOSTLY ABOVE 8500 MB WHICH COMBINED WITH THE
TENDENCY OF THE STORMS TO MOVE TO THE NORTHEAST OF THE WARM FRONT
SHOULD KEEP THE STORMS ELEVATED IN NATURE. EFFECTIVE SHEAR OF 50 TO
55 KT AND MID-LEVEL LAPSE RATES OF 7.0 TO 7.5 C/M SHOULD BE
SUFFICIENT FOR MARGINAL HAIL WITH STRONGER CORES. THE STABLE
BOUNDARY LAYER SHOULD KEEP ANY THREAT FOR STRONG WIND GUSTS MINIMAL.
..BROYLES.. 03/02/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CAE...GSP...MRX...FFC...
LAT...LON 35568470 35258507 34738489 34448419 34228352 34158245
33948124 34258082 34858085 35248187 35598392 35568470SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 2:58 PM EST | Mesoscale Discussion | SPC | Bartow, Catoosa, Cherokee, Dawson, Fannin, Forsyth and 14 more | 62 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 Georgia, 2012Mesoscale Discussions in South Carolina, 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.