Alert archive / Georgia / Tornado Watches in 2012

Tornado Watch 35

February 24, 20124 states

The Storm Prediction Center issued this tornado watch at Feb 24, 2012, 7:48 AM CST for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Feb 24, 2012, 7:48 AM CST (13:48 UTC)
Expired
Feb 24, 2012, 3:00 PM CST
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
65 kt
All 129 counties

Autauga County, AL, Baldwin County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Clay County, AL, Conecuh County, AL, Coosa County, AL, Covington County, AL, Crenshaw County, AL, Dallas County, AL, Elmore County, AL, Escambia County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Tallapoosa County, AL, Washington County, AL, Wilcox County, AL, Baldwin County, GA, Banks County, GA, Barrow County, GA, Bibb County, GA, Bleckley County, GA, Burke County, GA, Butts County, GA, Chattahoochee County, GA, Clarke County, GA, Clayton County, GA, Columbia County, GA, Coweta County, GA, Crawford County, GA, DeKalb County, GA, Dodge County, GA, Dooly County, GA, Elbert County, GA, Emanuel County, GA, Fayette County, GA, Glascock County, GA, Greene County, GA, Gwinnett County, GA, Hall County, GA, Hancock County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Jackson County, GA, Jasper County, GA, Jefferson County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lincoln County, GA, Macon County, GA, Madison County, GA, Marion County, GA, McDuffie County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Muscogee County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Putnam County, GA, Richmond County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Treutlen County, GA, Troup County, GA, Twiggs County, GA, Upson County, GA, Walton County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wilkes County, GA, Wilkinson County, GA, George County, MS, Greene County, MS, Perry County, MS, Stone County, MS, Wayne County, MS, Abbeville County, SC, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Edgefield County, SC, Fairfield County, SC, Greenwood County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Union County, SC

What SPC expected

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

Two or more tornadoes
60%
One or more EF2 to EF5 tornadoes
50%
Ten or more severe wind reports
95%
One or more gusts of 65 knots or more
40%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Feb 24, 7:48 AM CSTSevere Thunderstorm WarningBMXChambers10 min
Feb 24, 7:49 AM CSTSevere Thunderstorm WarningFFCHarris, Meriwether, Troup26 min
Feb 24, 8:06 AM CSTSevere Thunderstorm WarningMOBWashington39 min
Feb 24, 8:23 AM CSTTornado WarningFFCButts, Henry, Jasper, Newton37 min
Feb 24, 8:28 AM CSTTornado WarningFFCGreene, Oglethorpe, Taliaferro, Wilkes32 min
Feb 24, 8:40 AM CSTTornado WarningFFCGreene, Jasper, Morgan, Putnam50 min
Feb 24, 8:51 AM CSTSevere Thunderstorm WarningMOBClarke, Monroe, Washington39 min
Feb 24, 9:03 AM CSTSevere Thunderstorm WarningBMXDallas, Lowndes42 min
Feb 24, 9:14 AM CSTTornado WarningFFCGreene, Hancock, Taliaferro, Warren, Wilkes46 min
Feb 24, 9:20 AM CSTTornado WarningMOBClarke, Conecuh, Monroe40 min
Feb 24, 9:30 AM CSTSevere Thunderstorm WarningMOBClarke, Wilcox30 min
Feb 24, 9:30 AM CSTSevere Thunderstorm WarningFFCBaldwin, Jasper, Jones, Monroe, Putnam30 min
Feb 24, 9:32 AM CSTSevere Thunderstorm WarningBMXBullock, Lowndes, Macon, Montgomery28 min
Feb 24, 9:35 AM CSTTornado WarningMOBWilcox25 min
Feb 24, 9:39 AM CSTTornado WarningFFCGreene, Hancock, Morgan, Putnam, Taliaferro36 min
Feb 24, 9:45 AM CSTSevere Thunderstorm WarningBMXDallas45 min
Feb 24, 9:52 AM CSTSevere Thunderstorm WarningMOBButler, Conecuh, Crenshaw, Monroe, Wilcox38 min
Feb 24, 9:53 AM CSTSevere Thunderstorm WarningBMXBullock, Macon, Montgomery37 min
Feb 24, 9:53 AM CSTSevere Thunderstorm WarningFFCButts, Jasper, Jones, Monroe22 min
Feb 24, 10:06 AM CSTSevere Thunderstorm WarningFFCBaldwin, Jasper, Jones, Putnam24 min
Feb 24, 10:06 AM CSTTornado WarningFFCHancock, Taliaferro, Warren24 min
Feb 24, 10:13 AM CSTTornado WarningMOBButler, Crenshaw32 min
Feb 24, 10:14 AM CSTSevere Thunderstorm WarningBMXAutauga, Dallas31 min
Feb 24, 10:28 AM CSTSevere Thunderstorm WarningFFCBaldwin, Greene, Hancock, Putnam32 min
Feb 24, 10:34 AM CSTTornado WarningBMXPike31 min
Feb 24, 10:39 AM CSTSevere Thunderstorm WarningFFCGreene, Hancock, Taliaferro, Warren36 min
Feb 24, 11:01 AM CSTTornado WarningBMXBarbour, Bullock20 min
Feb 24, 11:06 AM CSTSevere Thunderstorm WarningCAEMcDuffie24 min
Feb 24, 11:06 AM CSTSevere Thunderstorm WarningFFCGlascock, Warren24 min
Feb 24, 11:20 AM CSTSevere Thunderstorm WarningCAEColumbia25 min
Feb 24, 11:28 AM CSTSevere Thunderstorm WarningCAEColumbia, Richmond32 min
Feb 24, 12:01 PM CSTSevere Thunderstorm WarningCAEAiken, Calhoun, Lexington, Orangeburg, Richland29 min
Feb 24, 12:07 PM CSTTornado WarningCAECalhoun, Lexington31 min
Feb 24, 12:33 PM CSTSevere Thunderstorm WarningCAECalhoun, Clarendon, Kershaw, Lee, Orangeburg, Richland and 1 more42 min
Feb 24, 12:43 PM CSTTornado WarningCAECalhoun, Clarendon, Sumter17 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 12:00Z, 1.8 hours before the alert went out and 129 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 12:00Z on 2012-02-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1231 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 2012-02-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 163 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
1231 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
542 m above ground
0-6 km bulk shear
83 kt
0-1 km storm-relative helicity
163 m²/s²
0-3 km storm-relative helicity
306 m²/s²
Significant tornado parameter
1.3
Supercell composite
4.7

Open this sounding in Storm Lab

The text

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

404 
WWUS20 KWNS 241351
SEL5
SPC WW 241351
ALZ000-GAZ000-MSZ000-SCZ000-242100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 35
NWS STORM PREDICTION CENTER NORMAN OK
850 AM EST FRI FEB 24 2012

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

       SOUTHERN AND CENTRAL ALABAMA
       CENTRAL GEORGIA
       SOUTHEAST MISSISSIPPI
       PIEDMONT AND UPSTATE SOUTH CAROLINA

EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 850 AM UNTIL 400
PM EST.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE
MILES EITHER SIDE OF A LINE FROM 40 MILES NORTHWEST OF MOBILE
ALABAMA TO 55 MILES EAST NORTHEAST OF COLUMBIA SOUTH CAROLINA.
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.

DISCUSSION...TSTMS EXPECTED TO CONTINUE INCREASING ALONG PRE-FRONTAL
AXIS OF CONFLUENCE AS REGION IS GLANCED BY SE SIDE OF
POTENT...AMPLIFYING IL UPR TROUGH..  WHILE STORMS TO THIS POINT HAVE
BEEN SOMEWHAT ELEVATED...ACTIVITY EXPECTED TO BECOME INCREASINGLY
SFC-BASED.  GIVEN STRENGTH OF LOW TO MID LVL WIND FIELD AND ONSET OF
DAYTIME HEATING...POTENTIAL WILL EXIST FOR SUSTAINED SUPERCELLS/BOWS
WITH AN ATTENDANT RISK FOR TORNADOES AND SWATHS OF DMGG WIND.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 26050.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 24, 5:56 AM CSTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Bullock, Calhoun, Chambers and 20 more94 min
Feb 24, 9:49 AM CSTMesoscale DiscussionSPCBarbour, Bullock, Butler, Chambers, Coffee, Conecuh and 13 more56 min
Feb 24, 11:04 AM CSTTornado WatchSPCCoffee, Dale, Geneva, Henry, Houston7 hr
Feb 24, 12:50 PM CSTMesoscale DiscussionSPCHenry, Houston85 min
Feb 24, 3:11 PM CSTMesoscale DiscussionSPCCoffee, Dale, Geneva, Henry, Houston64 min
Feb 24, 8:17 AM CSTTornado WatchSPCFranklin, Habersham, Hart, Rabun, Stephens7 hr
Feb 24, 11:00 AM CSTMesoscale DiscussionSPCFannin, Rabun, Towns, Union60 min
Feb 24, 2:24 PM CSTMesoscale DiscussionSPCFannin, Rabun, Towns, Union66 min
Feb 24, 8:05 AM CSTMesoscale DiscussionSPCCherokee, York25 min
Feb 24, 10:10 AM CSTMesoscale DiscussionSPCBamberg, Barnwell, Calhoun, Clarendon, Darlington, Dillon and 11 more65 min
Feb 24, 11:43 AM CSTMesoscale DiscussionSPCDarlington, Dillon, Florence, Georgetown, Horry, Marion and 2 more92 min
Feb 24, 12:19 PM CSTTornado WatchSPCDarlington, Dillon, Florence, Georgetown, Horry, Marion and 2 more7 hr
Feb 24, 3:45 PM CSTMesoscale DiscussionSPCDarlington, Dillon, Florence, Georgetown, Horry, Marion and 2 more90 min

Nearby

Tornado Watches in Georgia, 2012Tornado Watches in Alabama, 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.