Alert archive / Georgia / Tornado Watches in 2012

Tornado Watch 65

March 2, 201267 counties in Georgia; 22 counties in North Carolina; 12 counties in South Carolina

The Storm Prediction Center issued this tornado watch at Mar 2, 2012, 10:54 PM EST for 67 counties in Georgia; 22 counties in North Carolina; 12 counties in South Carolina. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Mar 2, 2012, 10:54 PM EST (03:54 UTC)
Expired
Mar 3, 2012, 5:00 AM EST
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 101 counties

Banks County, GA, Barrow County, GA, Bartow County, GA, Butts County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Elbert County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Greene County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Haralson County, GA, Harris County, GA, Hart County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Lamar County, GA, Lumpkin County, GA, Madison County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Murray County, GA, Muscogee County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Putnam County, GA, Rabun County, GA, Rockdale County, GA, Spalding County, GA, Stephens County, GA, Talbot County, GA, Taliaferro County, GA, Towns County, GA, Troup County, GA, Union County, GA, Upson County, GA, Walker County, GA, Walton County, GA, White County, GA, Whitfield County, GA, Wilkes County, GA, Alexander County, NC, Avery County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Catawba County, NC, Cleveland County, NC, Gaston County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Lincoln County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Yancey County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Greenville County, SC, Greenwood County, SC, Laurens County, SC, Oconee County, SC, Pickens County, SC, Spartanburg County, SC, Union County, SC, York County, SC

The radar

The Greer radar (KGSP), 42 km from the middle of the area, began a volume at 03:56 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Mar 2, 10:59 PM ESTSevere Thunderstorm WarningFFCChattooga, Floyd51 min
Mar 2, 11:03 PM ESTSevere Thunderstorm WarningGSPMadison, Mitchell, Yancey42 min
Mar 2, 11:19 PM ESTFlash Flood WarningFFCChattooga, Floyd, Gordon4 hr
Mar 2, 11:22 PM ESTSevere Thunderstorm WarningGSPAvery, Mitchell38 min
Mar 3, 12:11 AM ESTFlash Flood WarningFFCGilmer, Pickens5 hr
Mar 3, 12:15 AM ESTTornado WarningFFCTroup45 min
Mar 3, 12:51 AM ESTSevere Thunderstorm WarningFFCHaralson, Paulding, Polk39 min
Mar 3, 12:56 AM ESTSevere Thunderstorm WarningFFCCoweta, Meriwether11 min
Mar 3, 1:29 AM ESTSevere Thunderstorm WarningFFCDeKalb, Fulton31 min
Mar 3, 1:42 AM ESTSevere Thunderstorm WarningFFCGwinnett, Walton33 min
Mar 3, 1:58 AM ESTTornado WarningFFCBarrow, Gwinnett, Walton34 min
Mar 3, 2:10 AM ESTSevere Thunderstorm WarningGSPCherokee, Spartanburg, Union30 min
Mar 3, 3:20 AM ESTSevere Thunderstorm WarningGSPElbert30 min
Mar 3, 3:47 AM ESTFlash Flood WarningFFCDeKalb6 hr
Mar 3, 4:11 AM ESTFlash Flood WarningFFCGwinnett6 hr
Mar 3, 4:14 AM ESTSevere Thunderstorm WarningGSPAbbeville, Greenwood, Laurens27 min
Mar 3, 4:26 AM ESTTornado WarningGSPGreenwood, Laurens15 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 3.9 hours before the alert went out and 235 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.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2012-03-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 540 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2012-03-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
540 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
948 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
274 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

949 
WWUS20 KWNS 030355
SEL5  
SPC WW 030355
GAZ000-NCZ000-SCZ000-031000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 65
NWS STORM PREDICTION CENTER NORMAN OK
1055 PM EST FRI MAR 2 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       NORTHERN AND CENTRAL GEORGIA
       WESTERN NORTH CAROLINA
       UPSTATE SOUTH CAROLINA

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1055 PM
UNTIL 500 AM EST.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 5 MILES EAST SOUTHEAST OF
CHARLOTTE NORTH CAROLINA TO 35 MILES SOUTH SOUTHWEST OF ROME
GEORGIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 61...WW 63...WW 64...

DISCUSSION...SCATTERED STRONG TO SEVERE THUNDERSTORMS CONTINUE OVER
PARTS OF NORTH GA/AL.  THESE STORMS WILL TRACK EASTWARD ACROSS THE
WATCH AREA THROUGH THE NEXT SEVERAL HOURS.  STORMS HAVE SHOWN AN
OVERALL DECREASE IN INTENSITY THROUGH 4Z...BUT THE PRESENCE OF THE
SURFACE WARM FRONT AND STRONG LOW LEVEL WINDS SUGGEST A CONTINUED
THREAT OF WIDELY SCATTERED SEVERE WEATHER...INCLUDING ISOLATED
TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 25035.


...HART

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 2, 8:15 PM ESTMesoscale DiscussionSPCCatoosa, Dade, Fannin, Gilmer, Murray, Rabun and 4 more90 min
Mar 2, 8:18 PM ESTMesoscale DiscussionSPCDade57 min
Mar 2, 9:36 PM ESTMesoscale DiscussionSPCBaker, Calhoun, Colquitt, Cook, Decatur, Dougherty and 6 more54 min
Mar 2, 11:07 PM ESTMesoscale DiscussionSPCCarroll, Clayton, Cobb, Coweta, DeKalb, Douglas and 13 more113 min
Mar 3, 12:40 AM ESTMesoscale DiscussionSPCBanks, Barrow, Bartow, Carroll, Cherokee, Clarke and 30 more95 min
Mar 3, 3:58 AM ESTMesoscale DiscussionSPCBurke, Columbia, Glascock, Jefferson, Jenkins, Lincoln and 6 more92 min
Mar 3, 4:39 AM ESTSevere Thunderstorm WatchSPCBurke, Columbia, Lincoln, McDuffie, Richmond4 hr
Mar 3, 5:47 AM ESTMesoscale DiscussionSPCBaker, Berrien, Brooks, Calhoun, Clay, Colquitt and 18 more58 min
Mar 3, 7:35 AM ESTTornado WatchSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 49 more6 hr
Mar 3, 10:12 AM ESTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Berrien, Brantley, Brooks and 24 more93 min
Mar 3, 12:45 PM ESTMesoscale DiscussionSPCBrantley, Brooks, Camden, Charlton, Clinch, Echols and 3 more60 min
Mar 3, 1:04 PM ESTTornado WatchSPCAtkinson, Brantley, Brooks, Camden, Charlton, Clinch and 12 more5 hr
Mar 3, 4:30 PM ESTMesoscale DiscussionSPCCharlton90 min

Nearby

Tornado Watches in Georgia, 2012Tornado Watches in North Carolina, 2012Tornado Watches in South Carolina, 2012Every tornado watch 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.