Alert archive / Georgia / Severe Thunderstorm Watches in 2015

Severe Thunderstorm Watch 348

June 24, 201520 counties in Alabama; 94 counties in Georgia

The Storm Prediction Center issued this severe thunderstorm watch at Jun 24, 2015, 1:46 PM CDT for 20 counties in Alabama; 94 counties in Georgia. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Jun 24, 2015, 1:46 PM CDT (18:46 UTC)
Expired: Jun 24, 2015, 10:00 PM CDT
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

All 114 counties

Autauga County, AL, Barbour County, AL, Bullock County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Elmore County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Talladega County, AL, Tallapoosa County, AL, Baldwin County, GA, Banks County, GA, Barrow County, GA, Bartow County, GA, Ben Hill County, GA, Bibb County, GA, Bleckley County, GA, Butts County, GA, Carroll County, GA, Chattahoochee County, GA, Chattooga County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, Dawson County, GA, DeKalb County, GA, Dodge County, GA, Dooly County, GA, Douglas County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Glascock County, GA, Gordon County, GA, Greene County, GA, Gwinnett County, GA, Hall County, GA, Hancock County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Irwin County, GA, Jackson County, GA, Jasper County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lee County, GA, Lumpkin County, GA, Macon County, GA, Madison County, GA, Marion 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, Peach County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph 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, Terrell County, GA, Towns County, GA, Troup County, GA, Turner County, GA, Twiggs County, GA, Union County, GA, Upson County, GA, Walton County, GA, Warren County, GA, Washington County, GA, Webster County, GA, White County, GA, Whitfield County, GA, Wilcox County, GA, Wilkes County, GA, Wilkinson County, GA, Worth County, GA

The radar

The Atlanta radar (KFFC), 10 km from the middle of the area, began a volume at 18:48 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: 5%
One or more EF2 to EF5 tornadoes: 2%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 20%
One or more hailstones of 2 inches or more: 10%
Six or more combined severe hail and wind reports: 80%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 24, 1:56 PM CDT	Severe Thunderstorm Warning	FFC	Haralson	34 min
Jun 24, 2:13 PM CDT	Severe Thunderstorm Warning	FFC	Greene, Hancock, Taliaferro	47 min
Jun 24, 2:20 PM CDT	Severe Thunderstorm Warning	FFC	Gwinnett	40 min
Jun 24, 2:30 PM CDT	Severe Thunderstorm Warning	FFC	Forsyth, Fulton, Gwinnett	28 min
Jun 24, 2:40 PM CDT	Severe Thunderstorm Warning	FFC	Clayton, Fulton	50 min
Jun 24, 2:45 PM CDT	Severe Thunderstorm Warning	FFC	Walton	45 min
Jun 24, 2:50 PM CDT	Flash Flood Warning	FFC	Gwinnett	6 hr
Jun 24, 2:59 PM CDT	Severe Thunderstorm Warning	FFC	DeKalb, Gwinnett	46 min
Jun 24, 3:03 PM CDT	Severe Thunderstorm Warning	FFC	Clayton, Henry	42 min
Jun 24, 3:07 PM CDT	Severe Thunderstorm Warning	FFC	Henry, Spalding	38 min
Jun 24, 3:07 PM CDT	Severe Thunderstorm Warning	FFC	Hall, Jackson	38 min
Jun 24, 3:13 PM CDT	Severe Thunderstorm Warning	FFC	Banks, Hall	47 min
Jun 24, 3:20 PM CDT	Severe Thunderstorm Warning	FFC	Newton, Rockdale	40 min
Jun 24, 3:23 PM CDT	Severe Thunderstorm Warning	FFC	Sumter	52 min
Jun 24, 3:30 PM CDT	Severe Thunderstorm Warning	FFC	Clayton, Fulton	30 min
Jun 24, 3:32 PM CDT	Severe Thunderstorm Warning	FFC	Morgan, Newton, Walton	25 min
Jun 24, 3:38 PM CDT	Severe Thunderstorm Warning	FFC	Douglas, Fulton	39 min
Jun 24, 3:43 PM CDT	Severe Thunderstorm Warning	FFC	Clayton, Coweta, Fayette, Henry, Meriwether, Pike and 1 more	47 min
Jun 24, 3:51 PM CDT	Severe Thunderstorm Warning	FFC	Whitfield	39 min
Jun 24, 4:05 PM CDT	Severe Thunderstorm Warning	FFC	Clayton, Fulton	40 min
Jun 24, 4:05 PM CDT	Severe Thunderstorm Warning	FFC	Baldwin, Wilkinson	40 min
Jun 24, 4:13 PM CDT	Severe Thunderstorm Warning	FFC	Murray, Whitfield	33 min
Jun 24, 4:16 PM CDT	Severe Thunderstorm Warning	FFC	Cobb, Douglas	22 min
Jun 24, 4:35 PM CDT	Severe Thunderstorm Warning	FFC	Cherokee, Dawson, Forsyth	40 min
Jun 24, 4:44 PM CDT	Severe Thunderstorm Warning	FFC	Gordon	31 min
Jun 24, 4:49 PM CDT	Severe Thunderstorm Warning	FFC	Crawford, Taylor, Upson	41 min
Jun 24, 4:55 PM CDT	Severe Thunderstorm Warning	FFC	Cherokee	50 min
Jun 24, 4:57 PM CDT	Severe Thunderstorm Warning	FFC	Morgan, Putnam	31 min
Jun 24, 4:58 PM CDT	Severe Thunderstorm Warning	FFC	Baldwin	30 min
Jun 24, 5:08 PM CDT	Severe Thunderstorm Warning	FFC	Dawson, Forsyth	27 min
Jun 24, 5:24 PM CDT	Severe Thunderstorm Warning	FFC	Bartow, Paulding, Polk	51 min
Jun 24, 5:33 PM CDT	Severe Thunderstorm Warning	FFC	Dawson, Pickens	42 min
Jun 24, 5:40 PM CDT	Severe Thunderstorm Warning	FFC	Harris, Talbot	38 min
Jun 24, 6:20 PM CDT	Severe Thunderstorm Warning	BMX	Chambers, Randolph	55 min
Jun 24, 6:26 PM CDT	Severe Thunderstorm Warning	FFC	Harris, Muscogee	34 min
Jun 24, 6:34 PM CDT	Severe Thunderstorm Warning	BMX	Lee, Russell	56 min
Jun 24, 6:38 PM CDT	Severe Thunderstorm Warning	FFC	Muscogee	30 min
Jun 24, 6:58 PM CDT	Severe Thunderstorm Warning	BMX	Chambers	35 min
Jun 24, 7:06 PM CDT	Severe Thunderstorm Warning	BMX	Tallapoosa	54 min
Jun 24, 7:14 PM CDT	Severe Thunderstorm Warning	BMX	Cleburne	61 min
Jun 24, 7:32 PM CDT	Severe Thunderstorm Warning	BMX	Lee, Macon, Tallapoosa	58 min
Jun 24, 7:46 PM CDT	Severe Thunderstorm Warning	FFC	Laurens, Treutlen	44 min
Jun 24, 7:57 PM CDT	Severe Thunderstorm Warning	FFC	Johnson, Laurens	48 min
Jun 24, 7:58 PM CDT	Severe Thunderstorm Warning	BMX	Clay, Cleburne	62 min
Jun 24, 8:20 PM CDT	Severe Thunderstorm Warning	BMX	Bullock, Elmore, Macon, Montgomery	55 min
Jun 24, 9:13 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Lowndes, Montgomery	62 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, 6.8 hours before the alert went out and 15 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2208 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 1040 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 51 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 24, 1:14 PM CDT	Mesoscale Discussion	SPC	Chambers, Cleburne, Lee, Randolph	2 hr
Jun 24, 4:44 PM CDT	Mesoscale Discussion	SPC	Barbour, Bullock, Chambers, Cleburne, Lee, Macon and 4 more	91 min

Nearby

Severe Thunderstorm Watches in Georgia, 2015 Severe Thunderstorm Watches in Alabama, 2015 Every severe thunderstorm watch in 2015

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.