Alert archive / Georgia / Tornado Watches in 2012

Tornado Watch 68

March 3, 2012Geneva County, Houston County, Alabama; 15 counties in Florida; 55 counties in Georgia

The Storm Prediction Center issued this tornado watch at Mar 3, 2012, 6:35 AM CST for Geneva County, Houston County, Alabama; 15 counties in Florida; 55 counties in Georgia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Mar 3, 2012, 6:35 AM CST (12:35 UTC)
Expired
Mar 3, 2012, 1:00 PM CST
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 72 counties

Geneva County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Hamilton County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Bleckley County, GA, Brantley County, GA, Brooks County, GA, Calhoun County, GA, Camden County, GA, Charlton County, GA, Clay County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Emanuel County, GA, Glynn County, GA, Grady County, GA, Irwin County, GA, Jeff Davis County, GA, Johnson County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Lowndes County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Pierce County, GA, Pulaski County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Sumter County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA

The radar

The Tallahassee radar (KTLH), 76 km from the middle of the area, began a volume at 12:36 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
50%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Mar 3, 6:42 AM CSTTornado WarningTAEDougherty, Mitchell, Worth33 min
Mar 3, 7:13 AM CSTSevere Thunderstorm WarningTAEHolmes, Walton32 min
Mar 3, 7:20 AM CSTSevere Thunderstorm WarningTAEBaker, Early, Miller, Mitchell40 min
Mar 3, 7:21 AM CSTSevere Thunderstorm WarningTAEGeneva, Houston39 min
Mar 3, 7:27 AM CSTSevere Thunderstorm WarningTAEWalton, Washington48 min
Mar 3, 7:29 AM CSTTornado WarningTAEDecatur, Grady, Mitchell31 min
Mar 3, 7:48 AM CSTSevere Thunderstorm WarningTAEBay, Walton, Washington27 min
Mar 3, 7:57 AM CSTSevere Thunderstorm WarningTAEHolmes, Jackson, Washington33 min
Mar 3, 8:13 AM CSTTornado WarningTAEBen Hill, Irwin, Tift32 min
Mar 3, 8:16 AM CSTTornado WarningTAEGadsden, Jefferson, Leon, Liberty44 min
Mar 3, 8:37 AM CSTSevere Thunderstorm WarningJAXCoffee38 min
Mar 3, 8:54 AM CSTSevere Thunderstorm WarningTAEGadsden, Jefferson, Leon36 min
Mar 3, 8:57 AM CSTTornado WarningTAEGadsden, Leon, Liberty48 min
Mar 3, 8:59 AM CSTTornado WarningJAXCoffee31 min
Mar 3, 9:12 AM CSTSevere Thunderstorm WarningJAXBacon, Coffee, Jeff Davis33 min
Mar 3, 9:16 AM CSTTornado WarningTAECalhoun, Gadsden, Jackson, Liberty29 min
Mar 3, 9:31 AM CSTSevere Thunderstorm WarningJAXAppling, Bacon, Jeff Davis29 min
Mar 3, 9:36 AM CSTTornado WarningTAEBrooks, Thomas24 min
Mar 3, 9:43 AM CSTTornado WarningTAEGadsden32 min
Mar 3, 9:48 AM CSTSevere Thunderstorm WarningJAXBacon, Coffee, Jeff Davis42 min
Mar 3, 9:59 AM CSTTornado WarningTAEBrooks, Lowndes31 min
Mar 3, 10:13 AM CSTSevere Thunderstorm WarningTAEGadsden, Leon32 min
Mar 3, 10:28 AM CSTSevere Thunderstorm WarningTAEGadsden, Leon32 min
Mar 3, 10:31 AM CSTTornado WarningTAEBerrien, Brooks, Cook, Lanier, Lowndes29 min
Mar 3, 10:48 AM CSTSevere Thunderstorm WarningTAEGrady, Thomas27 min
Mar 3, 11:03 AM CSTTornado WarningJAXAtkinson, Clinch, Ware42 min
Mar 3, 11:22 AM CSTFlash Flood WarningTAEBay, Calhoun, Gadsden, Jackson, Liberty, Walton and 1 more4 hr
Mar 3, 11:23 AM CSTTornado WarningTAEBrooks, Lowndes37 min
Mar 3, 11:34 AM CSTFlash Flood WarningTAEBaker, Decatur, Early, Miller, Seminole3 hr
Mar 3, 11:42 AM CSTTornado WarningJAXBrantley, Pierce, Ware48 min
Mar 3, 11:45 AM CSTSevere Thunderstorm WarningTAEBerrien, Cook, Lanier, Lowndes30 min
Mar 3, 11:53 AM CSTTornado WarningTAEBerrien, Cook, Lanier, Lowndes37 min
Mar 3, 11:55 AM CSTSevere Thunderstorm WarningJAXWayne21 min
Mar 3, 12:13 PM CSTTornado WarningJAXBrantley, Pierce, Wayne47 min
Mar 3, 12:17 PM CSTTornado WarningJAXAtkinson, Clinch, Ware43 min
Mar 3, 12:28 PM CSTSevere Thunderstorm WarningTAEBerrien, Brooks, Lanier, Lowndes, Thomas62 min
Mar 3, 12:29 PM CSTFlash Flood WarningTAEGadsden, Jackson3 hr
Mar 3, 12:34 PM CSTFlash Flood WarningTAEBerrien, Brooks, Cook, Decatur, Grady, Lanier and 2 more3 hr
Mar 3, 12:43 PM CSTTornado WarningJAXBrantley, Glynn, Wayne25 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 0.6 hours before the alert went out and 77 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, Tallahassee Rgnl, FL at 12:00Z on 2012-03-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 499 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, Tallahassee Rgnl, FL at 12:00Z on 2012-03-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 257 square meters per square second.1939587897Sfc1 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
499 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
472 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
257 m²/s²
0-3 km storm-relative helicity
283 m²/s²
Significant tornado parameter
0.9
Supercell composite
4.1

Open this sounding in Storm Lab

The text

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

617 
WWUS20 KWNS 031234
SEL8
SPC WW 031234
ALZ000-FLZ000-GAZ000-CWZ000-031900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 68
NWS STORM PREDICTION CENTER NORMAN OK
735 AM EST SAT MAR 3 2012

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

       EXTREME SOUTHEAST ALABAMA
       THE CENTRAL AND EASTERN FLORIDA PANHANDLE
       SOUTH CENTRAL AND SOUTHWEST GEORGIA
       COASTAL WATERS

EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 735 AM UNTIL
200 PM 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 50 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST NORTHWEST OF
PANAMA CITY FLORIDA TO 75 MILES NORTHEAST OF VALDOSTA GEORGIA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU8).

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 67...

DISCUSSION...PRE-FRONTAL STORMS HAVE BEEN GRADUALLY INCREASING IN
COVERAGE/INTENSITY ACROSS THE FL PANHANDLE AND SW GA...AND THIS
TREND WILL CONTINUE THROUGH THE MORNING AS SURFACE HEATING BEGINS TO
DESTABILIZE THE BOUNDARY LAYER.  MLCAPE IS EXPECTED TO INCREASE TO
1000-1500 J/KG WITH DAYTIME HEATING...AND VERTICAL SHEAR WILL REMAIN
FAVORABLE FOR SUPERCELLS CAPABLE OF PRODUCING A FEW TORNADOES.
OTHERWISE...DAMAGING WINDS AND LARGE HAIL WILL BE POSSIBLE WITH THE
STRONGER STORMS THROUGH EARLY AFTERNOON.

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
500. MEAN STORM MOTION VECTOR 24040.


...THOMPSON

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 2, 7:18 PM CSTMesoscale DiscussionSPCBlount, Cullman, DeKalb, Fayette, Greene, Jackson and 12 more57 min
Mar 2, 10:07 PM CSTMesoscale DiscussionSPCAutauga, Bibb, Calhoun, Chambers, Cherokee, Chilton and 25 more113 min
Mar 2, 10:56 PM CSTTornado WatchSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 31 more6 hr
Mar 3, 4:47 AM CSTMesoscale DiscussionSPCCoffee, Covington, Dale, Geneva, Henry, Houston58 min
Mar 3, 9:12 AM CSTMesoscale DiscussionSPCBay, Calhoun, Gadsden, Hamilton, Jefferson, Leon and 3 more93 min
Mar 3, 11:45 AM CSTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 15 more60 min
Mar 3, 12:04 PM CSTTornado WatchSPCAlachua, Baker, Bradford, Calhoun, Clay, Columbia and 17 more5 hr
Mar 3, 3:30 PM CSTMesoscale DiscussionSPCBaker, Columbia, Hamilton, Lafayette, Nassau, Suwannee and 2 more90 min
Mar 2, 7:15 PM CSTMesoscale DiscussionSPCCatoosa, Dade, Fannin, Gilmer, Murray, Rabun and 4 more90 min
Mar 2, 8:36 PM CSTMesoscale DiscussionSPCBaker, Calhoun, Colquitt, Cook, Decatur, Dougherty and 6 more54 min
Mar 2, 9:54 PM CSTTornado WatchSPCBanks, Barrow, Bartow, Butts, Carroll, Catoosa and 61 more6 hr
Mar 2, 11:40 PM CSTMesoscale DiscussionSPCBanks, Barrow, Bartow, Carroll, Cherokee, Clarke and 30 more95 min
Mar 3, 2:58 AM CSTMesoscale DiscussionSPCBurke, Columbia, Glascock, Jefferson, Jenkins, Lincoln and 6 more92 min
Mar 3, 3:39 AM CSTSevere Thunderstorm WatchSPCBurke, Columbia, Lincoln, McDuffie, Richmond4 hr

Nearby

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