Alert archive / Georgia / Tornado Watches in 2010

Tornado Watch 102

April 25, 2010107 counties in Georgia; 9 counties in North Carolina; 6 counties in South Carolina

The Storm Prediction Center issued this tornado watch at Apr 25, 2010, 1:17 AM EDT for 107 counties in Georgia; 9 counties in North Carolina; 6 counties in South Carolina. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Apr 25, 2010, 1:17 AM EDT (05:17 UTC)
Expired
Apr 25, 2010, 9:00 AM EDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 122 counties

Baldwin County, GA, Banks County, GA, Barrow County, GA, Bartow County, GA, Bibb County, GA, Bleckley County, GA, Burke County, GA, Butts County, GA, Carroll County, GA, Catoosa County, GA, Chattahoochee County, GA, Chattooga County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Columbia County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Dodge County, GA, Dooly County, GA, Douglas County, GA, Elbert County, GA, Emanuel County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Gilmer County, GA, Glascock County, GA, Gordon County, GA, Greene County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Hancock County, GA, Haralson County, GA, Harris County, GA, Hart 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, Lumpkin County, GA, Macon County, GA, Madison County, GA, Marion County, GA, McDuffie County, GA, Meriwether County, GA, Monroe County, GA, Montgomery County, GA, Morgan County, GA, Murray County, GA, Muscogee County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Peach County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Pulaski County, GA, Putnam County, GA, Rabun County, GA, Richmond County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Stephens County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Telfair County, GA, Toombs County, GA, Towns County, GA, Treutlen County, GA, Troup County, GA, Twiggs County, GA, Union County, GA, Upson County, GA, Walker County, GA, Walton County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, White County, GA, Whitfield County, GA, Wilcox County, GA, Wilkes County, GA, Wilkinson County, GA, Buncombe County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, Swain County, NC, Transylvania County, NC, Abbeville County, SC, Anderson County, SC, Greenville County, SC, McCormick County, SC, Oconee County, SC, Pickens County, SC

The radar

The Atlanta radar (KFFC), 113 km from the middle of the area, began a volume at 05:20 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
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
40%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 25, 1:18 AM EDTTornado WarningFFCChattooga49 min
Apr 25, 1:40 AM EDTFlash Flood WarningFFCWalker, Whitfield113 min
Apr 25, 1:40 AM EDTTornado WarningFFCFannin, Gilmer, Murray30 min
Apr 25, 1:49 AM EDTSevere Thunderstorm WarningFFCChattooga, Floyd41 min
Apr 25, 2:11 AM EDTSevere Thunderstorm WarningGSPElbert36 min
Apr 25, 3:08 AM EDTTornado WarningGSPMacon27 min
Apr 25, 4:57 AM EDTSevere Thunderstorm WarningFFCCrisp, Dooly, Pulaski, Wilcox23 min
Apr 25, 5:13 AM EDTSevere Thunderstorm WarningFFCBleckley, Dodge, Pulaski32 min
Apr 25, 5:49 AM EDTSevere Thunderstorm WarningCAEBurke41 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, 5.3 hours before the alert went out and 109 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

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 24, 8:11 PM EDTTornado WatchSPCBartow, Carroll, Catoosa, Chattooga, Cherokee, Cobb and 24 more7 hr
Apr 24, 10:58 PM EDTMesoscale DiscussionSPCBaker, Baldwin, Ben Hill, Berrien, Bibb, Bleckley and 63 more32 min
Apr 24, 11:46 PM EDTTornado WatchSPCBaker, Ben Hill, Berrien, Bibb, Brooks, Butts and 50 more7 hr
Apr 25, 12:27 AM EDTMesoscale DiscussionSPCBartow, Carroll, Catoosa, Chattooga, Cherokee, Cobb and 23 more63 min
Apr 25, 12:55 AM EDTMesoscale DiscussionSPCBanks, Barrow, Butts, Clarke, Columbia, Elbert and 25 more35 min
Apr 25, 4:01 AM EDTMesoscale DiscussionSPCBaker, Baldwin, Bibb, Bleckley, Calhoun, Clay and 40 more89 min
Apr 25, 6:38 AM EDTMesoscale DiscussionSPCAppling, Atkinson, Baker, Ben Hill, Berrien, Brooks and 32 more67 min
Apr 25, 12:05 AM EDTMesoscale DiscussionSPCCherokee, Clay55 min
Apr 25, 2:53 PM EDTMesoscale DiscussionSPCAlamance, Alleghany, Ashe, Caswell, Chatham, Davidson and 18 more67 min
Apr 25, 6:01 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Chowan, Columbus, Craven and 31 more89 min
Apr 25, 2:37 AM EDTMesoscale DiscussionSPCAiken, Bamberg, Calhoun, Edgefield, Fairfield, Greenwood and 6 more53 min

Nearby

Tornado Watches in Georgia, 2010Tornado Watches in North Carolina, 2010Tornado Watches in South Carolina, 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; radar from the NEXRAD Level II archive.