Alert archive / Georgia / Severe Thunderstorm Watches in 2015

Severe Thunderstorm Watch 424

July 14, 20154 states

The Storm Prediction Center issued this severe thunderstorm watch at Jul 14, 2015, 3:59 PM CDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jul 14, 2015, 3:59 PM CDT (20:59 UTC)
Expired: Jul 14, 2015, 10:56 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 97 counties

Blount County, AL, Calhoun County, AL, Cherokee County, AL, Cleburne County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, St. Clair County, AL, Walker County, AL, Winston County, AL, Banks County, GA, Barrow County, GA, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Elbert County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Haralson County, GA, Hart County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Lumpkin County, GA, Madison County, GA, Morgan County, GA, Murray County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Rabun County, GA, Rockdale County, GA, Stephens County, GA, Towns County, GA, Union County, GA, Walker County, GA, Walton County, GA, White County, GA, Whitfield County, GA, Wilkes County, GA, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, DeSoto County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Yalobusha County, MS, Abbeville County, SC, Anderson County, SC, Oconee County, SC, Pickens County, SC

The radar

The Northeast Alabama radar (KHTX), 112 km from the middle of the area, began a volume at 21:02 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: 10%
One or more EF2 to EF5 tornadoes: 2%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 50%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 70%

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
Jul 14, 4:08 PM CDT	Severe Thunderstorm Warning	MEG	DeSoto, Marshall	37 min
Jul 14, 4:29 PM CDT	Severe Thunderstorm Warning	MEG	Benton, Marshall, Tippah	31 min
Jul 14, 4:58 PM CDT	Severe Thunderstorm Warning	GSP	Habersham, Rabun	77 min
Jul 14, 5:01 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Benton, DeSoto, Lafayette, Marshall, Panola and 3 more	44 min
Jul 14, 5:02 PM CDT	Severe Thunderstorm Warning	FFC	Fannin, Gilmer, Towns, Union	58 min
Jul 14, 5:07 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Tippah, Tishomingo	38 min
Jul 14, 5:21 PM CDT	Flash Flood Warning	MEG	Alcorn, Tishomingo	3 hr
Jul 14, 5:24 PM CDT	Severe Thunderstorm Warning	FFC	Catoosa, Dade, Fannin, Murray, Walker, Whitfield	51 min
Jul 14, 5:26 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Itawamba, Lafayette, Lee, Marshall, Pontotoc and 4 more	49 min
Jul 14, 5:36 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Tishomingo	39 min
Jul 14, 5:45 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	30 min
Jul 14, 5:48 PM CDT	Severe Thunderstorm Warning	FFC	Dawson, Fannin, Gilmer, Lumpkin, White	42 min
Jul 14, 5:48 PM CDT	Severe Thunderstorm Warning	GSP	Franklin, Habersham, Hart, Stephens	72 min
Jul 14, 5:55 PM CDT	Severe Thunderstorm Warning	HUN	Limestone, Madison	50 min
Jul 14, 6:08 PM CDT	Severe Thunderstorm Warning	HUN	Lauderdale, Lawrence, Limestone, Morgan	37 min
Jul 14, 6:08 PM CDT	Severe Thunderstorm Warning	FFC	Catoosa, Dade, Murray, Walker, Whitfield	37 min
Jul 14, 6:10 PM CDT	Severe Thunderstorm Warning	MEG	Chickasaw, Itawamba, Lee, Monroe, Pontotoc, Prentiss and 1 more	50 min
Jul 14, 6:23 PM CDT	Severe Thunderstorm Warning	HUN	Lawrence, Morgan	37 min
Jul 14, 6:26 PM CDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Gilmer, Gordon, Pickens	49 min
Jul 14, 6:38 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb	37 min
Jul 14, 6:39 PM CDT	Severe Thunderstorm Warning	FFC	Chattooga, Dade, Floyd, Walker, Whitfield	51 min
Jul 14, 6:42 PM CDT	Severe Thunderstorm Warning	BMX	Marion, Winston	63 min
Jul 14, 6:42 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Limestone, Madison, Marshall, Morgan	33 min
Jul 14, 6:43 PM CDT	Severe Thunderstorm Warning	FFC	Cherokee, Dawson, Forsyth, Fulton, Pickens	47 min
Jul 14, 6:47 PM CDT	Severe Thunderstorm Warning	GSP	Elbert	43 min
Jul 14, 6:56 PM CDT	Severe Thunderstorm Warning	FFC	Bartow, Gordon, Murray, Whitfield	49 min
Jul 14, 6:57 PM CDT	Severe Thunderstorm Warning	MEG	Monroe	33 min
Jul 14, 6:59 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	31 min
Jul 14, 7:00 PM CDT	Severe Thunderstorm Warning	FFC	Madison, Oglethorpe, Wilkes	45 min
Jul 14, 7:01 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison, Marshall	29 min
Jul 14, 7:06 PM CDT	Severe Thunderstorm Warning	FFC	Chattooga, Floyd	24 min
Jul 14, 7:10 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Walker	65 min
Jul 14, 7:12 PM CDT	Severe Thunderstorm Warning	FFC	Barrow, Forsyth, Gwinnett, Hall, Jackson	48 min
Jul 14, 7:15 PM CDT	Severe Thunderstorm Warning	HUN	Marshall, Morgan	30 min
Jul 14, 7:16 PM CDT	Severe Thunderstorm Warning	FFC	Bartow	29 min
Jul 14, 7:22 PM CDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Cobb, Gordon, Paulding, Pickens	23 min
Jul 14, 7:23 PM CDT	Severe Thunderstorm Warning	FFC	Clarke, Jackson, Oconee, Oglethorpe	37 min
Jul 14, 7:29 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	18 min
Jul 14, 7:30 PM CDT	Severe Thunderstorm Warning	FFC	Floyd, Polk	30 min
Jul 14, 7:31 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson	59 min
Jul 14, 7:36 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Marshall	39 min
Jul 14, 7:44 PM CDT	Severe Thunderstorm Warning	FFC	Bartow, Carroll, Cherokee, Cobb, DeKalb, Douglas and 6 more	46 min
Jul 14, 7:55 PM CDT	Severe Thunderstorm Warning	FFC	Morgan, Oconee, Walton	50 min
Jul 14, 8:20 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson	25 min
Jul 14, 8:22 PM CDT	Severe Thunderstorm Warning	FFC	Barrow, Clayton, Coweta, DeKalb, Fayette, Fulton and 5 more	38 min
Jul 14, 8:45 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cleburne	44 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

Birmingham, AL (KBMX), launched 12:00Z, 9.0 hours before the alert went out and 154 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: 745 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 1151 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: -41 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 14, 12:14 PM CDT	Mesoscale Discussion	SPC	Jackson	91 min
Jul 14, 2:41 PM CDT	Mesoscale Discussion	SPC	Colbert, Jackson, Lauderdale, Limestone, Madison	94 min
Jul 14, 3:55 PM CDT	Mesoscale Discussion	SPC	Blount, Cherokee, Colbert, Cullman, DeKalb, Etowah and 10 more	65 min
Jul 14, 5:24 PM CDT	Mesoscale Discussion	SPC	Blount, Calhoun, Cherokee, Cleburne, Colbert, Cullman and 17 more	2 hr
Jul 14, 6:36 PM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Chambers, Chilton, Clay, Cleburne and 11 more	114 min
Jul 13, 7:06 PM CDT	Mesoscale Discussion	SPC	Cherokee, Chester, Lancaster, Union, York	84 min
Jul 13, 9:34 PM CDT	Mesoscale Discussion	SPC	Chesterfield, Fairfield, Kershaw, Lancaster	86 min

Nearby

Severe Thunderstorm Watches in Georgia, 2015 Severe Thunderstorm Watches in Alabama, 2015 Severe Thunderstorm Watches in Mississippi, 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.