Alert archive / Georgia / Tornado Watches in 2010

Tornado Watch 101

April 24, 201018 counties in Alabama; 10 counties in Florida; 56 counties in Georgia

The Storm Prediction Center issued this tornado watch at Apr 24, 2010, 10:46 PM CDT for 18 counties in Alabama; 10 counties in Florida; 56 counties in Georgia. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Apr 24, 2010, 10:46 PM CDT (03:46 UTC)
Expired
Apr 25, 2010, 6:00 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 84 counties

Barbour County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Coffee County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Russell County, AL, Tallapoosa County, AL, Bay County, FL, Calhoun County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Liberty County, FL, Okaloosa County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Brooks County, GA, Butts County, GA, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Clayton County, GA, Colquitt County, GA, Cook County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Fayette County, GA, Grady County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Irwin County, GA, Lamar County, GA, Lanier County, GA, Lee County, GA, Lowndes County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Miller County, GA, Mitchell County, GA, Monroe County, GA, Muscogee County, GA, Peach County, GA, Pike County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Troup County, GA, Turner County, GA, Upson County, GA, Webster County, GA, Worth County, GA

What SPC expected

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

Two or more tornadoes
30%
One or more EF2 to EF5 tornadoes
30%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 24, 10:54 PM CDTSevere Thunderstorm WarningBMXBarbour26 min
Apr 24, 11:35 PM CDTSevere Thunderstorm WarningFFCCrawford, Marion, Talbot, Taylor, Upson40 min
Apr 25, 12:00 AM CDTSevere Thunderstorm WarningFFCButts, Jasper, Jones, Lamar, Monroe30 min
Apr 25, 3:57 AM CDTSevere Thunderstorm WarningFFCCrisp, Dooly, Pulaski, Wilcox23 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, 3.8 hours before the alert went out and 147 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 2010-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 92 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2010-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 604 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
92 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
587 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
604 m²/s²
0-3 km storm-relative helicity
815 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

988 
WWUS20 KWNS 250347
SEL1
SPC WW 250347
ALZ000-FLZ000-GAZ000-251100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 101
NWS STORM PREDICTION CENTER NORMAN OK
1045 PM CDT SAT APR 24 2010

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

       SOUTHEASTERN ALABAMA
       THE WESTERN AND CENTRAL FLORIDA PANHANDLE
       WESTERN GEORGIA

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1045 PM
UNTIL 600 AM CDT.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH OF MACON
GEORGIA TO 20 MILES SOUTH SOUTHWEST OF CRESTVIEW FLORIDA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU1).

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 98...WW 99...WW 100...

DISCUSSION...TSTMS ARE FORMING ALONG SSW-NNE LOW LVL CONFLUENCE ZONE
ACROSS THE WRN FL PANHANDLE AND SE AL.  THIS MAY REFLECT INCREASING
CONVERGENCE ALONG THE ZONE IN RESPONSE TO EWD SPREAD OF PRESSURE
FALLS ACROSS THE OH VLY WITH DEEPENING UPR TROUGH /REF MCD 385/.
STRENGTH OF LOW LVL SPEED/DIRECTIONAL SHEAR AND QUALITY OF MOISTURE
INFLOW SUGGEST A CONDITIONAL THREAT FOR TORNADOES WITH ANY UPDRAFTS
ABLE TO BECOME SUSTAINED AND ASSUME SUPERCELL CHARACTERISTICS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 24040.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 24, 7:11 PM CDTTornado WatchSPCAutauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 27 more7 hr
Apr 24, 7:19 PM CDTMesoscale DiscussionSPCBaldwin, Butler, Clarke, Coffee, Conecuh, Covington and 11 more56 min
Apr 24, 9:58 PM CDTMesoscale DiscussionSPCBaldwin, Barbour, Bullock, Butler, Chambers, Coffee and 13 more32 min
Apr 24, 11:27 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 25 more63 min
Apr 25, 3:01 AM CDTMesoscale DiscussionSPCHenry, Houston89 min
Apr 25, 5:38 AM CDTMesoscale DiscussionSPCCalhoun, Gadsden, Leon, Liberty67 min
Apr 25, 11:00 AM CDTMesoscale DiscussionSPCAlachua, Bradford, Citrus, Dixie, Flagler, Gilchrist and 11 more60 min
Apr 25, 11:18 AM CDTTornado WatchSPCAlachua, Bradford, Citrus, Clay, Dixie, Flagler and 12 more8 hr
Apr 25, 1:25 PM CDTMesoscale DiscussionSPCFlagler, Marion, Putnam, Volusia65 min
Apr 25, 3:17 PM CDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Citrus, Clay, Columbia and 11 more58 min
Apr 25, 5:25 PM CDTMesoscale DiscussionSPCBrevard, Hardee, Hillsborough, Lake, Manatee, Orange and 8 more65 min
Apr 25, 5:56 PM CDTSevere Thunderstorm WatchSPCBrevard, Charlotte, DeSoto, Hardee, Hernando, Highlands and 15 more5 hr
Apr 24, 11:55 PM CDTMesoscale DiscussionSPCBanks, Barrow, Butts, Clarke, Columbia, Elbert and 25 more35 min
Apr 25, 12:17 AM CDTTornado WatchSPCBaldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 101 more8 hr

Nearby

Tornado Watches in Georgia, 2010Tornado Watches in Alabama, 2010Tornado Watches in Florida, 2010Every tornado watch in 2010

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.