Alert archive / Tennessee / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 478

June 15, 20116 states

The Storm Prediction Center issued this severe thunderstorm watch at Jun 15, 2011, 11:52 AM CDT for 6 states. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: Jun 15, 2011, 11:52 AM CDT (16:52 UTC)
Expired: Jun 15, 2011, 9:00 PM CDT
In force: 9 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 159 counties

Colbert County, AL, Cullman County, AL, DeKalb County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, Banks County, GA, Barrow County, GA, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Cobb County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fannin 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, Jackson County, GA, Lumpkin County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Rabun County, GA, Stephens County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Alcorn County, MS, Benton County, MS, Marshall County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Avery County, NC, Buncombe County, NC, Burke County, NC, Cherokee County, NC, Clay County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Yancey County, NC, Greenville County, SC, Oconee County, SC, Pickens County, SC, Anderson County, TN, Bedford County, TN, Benton County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Cannon County, TN, Carroll County, TN, Carter County, TN, Cheatham County, TN, Chester County, TN, Claiborne County, TN, Clay County, TN, Cocke County, TN, Coffee County, TN, Crockett County, TN, Cumberland County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Fayette County, TN, Fentress County, TN, Franklin County, TN, Gibson County, TN, Giles County, TN, Grainger County, TN, Greene County, TN, Grundy County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hardeman County, TN, Hardin County, TN, Hawkins County, TN, Haywood County, TN, Henderson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Loudon County, TN, Macon County, TN, Madison County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, McNairy County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Polk County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Rutherford County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Smith County, TN, Sullivan County, TN, Sumner County, TN, Trousdale County, TN, Unicoi County, TN, Union County, TN, Van Buren County, TN, Warren County, TN, Washington County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 78 km from the middle of the area, began a volume at 16:51 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: 20%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 70%
One or more gusts of 65 knots or more: 50%
Ten or more severe hail reports: 60%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 15, 11:54 AM CDT	Severe Thunderstorm Warning	MRX	Hamilton, Sequatchie	66 min
Jun 15, 11:54 AM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	15 min
Jun 15, 11:59 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Sumner, Trousdale, Williamson, Wilson	61 min
Jun 15, 12:00 PM CDT	Severe Thunderstorm Warning	MRX	Campbell, Scott	60 min
Jun 15, 12:05 PM CDT	Severe Thunderstorm Warning	MRX	Loudon, Meigs, Rhea, Roane	25 min
Jun 15, 12:25 PM CDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Loudon, Roane	65 min
Jun 15, 12:34 PM CDT	Severe Thunderstorm Warning	FFC	Catoosa, Walker	41 min
Jun 15, 12:41 PM CDT	Severe Thunderstorm Warning	MRX	Morgan	64 min
Jun 15, 1:07 PM CDT	Severe Thunderstorm Warning	MRX	Bledsoe, Meigs, Rhea	25 min
Jun 15, 1:11 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, DeKalb, Rutherford, Smith, Williamson, Wilson	49 min
Jun 15, 1:38 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison, Marshall	30 min
Jun 15, 1:58 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Davidson, DeKalb, Rutherford, Williamson, Wilson	62 min
Jun 15, 2:04 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Marshall	26 min
Jun 15, 2:10 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Cumberland, DeKalb, Van Buren, Warren, White	65 min
Jun 15, 2:13 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	47 min
Jun 15, 2:18 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson, Marshall	27 min
Jun 15, 2:27 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Houston, Montgomery, Robertson, Stewart	33 min
Jun 15, 2:32 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Maury	28 min
Jun 15, 2:35 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	30 min
Jun 15, 2:38 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	52 min
Jun 15, 2:42 PM CDT	Severe Thunderstorm Warning	FFC	Dade, Walker	48 min
Jun 15, 2:45 PM CDT	Severe Thunderstorm Warning	GSP	Haywood	30 min
Jun 15, 2:50 PM CDT	Severe Thunderstorm Warning	GSP	Buncombe, Haywood, Madison	25 min
Jun 15, 2:57 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Houston, Montgomery, Robertson	63 min
Jun 15, 3:02 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury	28 min
Jun 15, 3:06 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Sumner, Williamson, Wilson	54 min
Jun 15, 3:11 PM CDT	Severe Thunderstorm Warning	MRX	Marion, Sequatchie	64 min
Jun 15, 3:12 PM CDT	Severe Thunderstorm Warning	MEG	Chester, Decatur, Hardin, Henderson, McNairy	48 min
Jun 15, 3:21 PM CDT	Severe Thunderstorm Warning	OHX	Grundy	19 min
Jun 15, 3:27 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Wilson	63 min
Jun 15, 3:33 PM CDT	Severe Thunderstorm Warning	FFC	Catoosa, Walker, Whitfield	42 min
Jun 15, 3:48 PM CDT	Severe Thunderstorm Warning	MEG	Hardin, McNairy	42 min
Jun 15, 3:48 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Lewis, Maury, Perry, Wayne	27 min
Jun 15, 3:59 PM CDT	Severe Thunderstorm Warning	MRX	Hamilton	61 min
Jun 15, 3:59 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Maury, Williamson	16 min
Jun 15, 4:03 PM CDT	Severe Thunderstorm Warning	GSP	Graham, Haywood, Jackson, Macon, Swain	57 min
Jun 15, 4:13 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	32 min
Jun 15, 4:16 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Maury	29 min
Jun 15, 4:17 PM CDT	Severe Thunderstorm Warning	MRX	Cherokee, Clay	58 min
Jun 15, 4:19 PM CDT	Severe Thunderstorm Warning	HUN	Franklin	11 min
Jun 15, 4:23 PM CDT	Severe Thunderstorm Warning	MRX	Bradley	67 min
Jun 15, 4:24 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	36 min
Jun 15, 4:26 PM CDT	Severe Thunderstorm Warning	GSP	Buncombe, Haywood, Jackson, Macon, Madison, Yancey	38 min
Jun 15, 4:28 PM CDT	Severe Thunderstorm Warning	MRX	Bledsoe, Sequatchie	62 min
Jun 15, 4:29 PM CDT	Severe Thunderstorm Warning	MEG	Hardin	16 min
Jun 15, 4:32 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Grundy	28 min
Jun 15, 4:43 PM CDT	Severe Thunderstorm Warning	MRX	Marion	32 min
Jun 15, 4:44 PM CDT	Severe Thunderstorm Warning	FFC	Floyd, Polk	37 min
Jun 15, 4:44 PM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Van Buren, Warren, White	31 min
Jun 15, 4:46 PM CDT	Severe Thunderstorm Warning	GSP	Rabun	29 min
Jun 15, 4:46 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	29 min
Jun 15, 4:48 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lewis, Maury	13 min
Jun 15, 4:52 PM CDT	Severe Thunderstorm Warning	FFC	Cobb, Paulding	38 min
Jun 15, 4:54 PM CDT	Severe Thunderstorm Warning	MRX	Polk	44 min
Jun 15, 4:55 PM CDT	Severe Thunderstorm Warning	OHX	Davidson	35 min
Jun 15, 4:57 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Williamson	48 min
Jun 15, 4:59 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Grundy	31 min
Jun 15, 5:00 PM CDT	Severe Thunderstorm Warning	MRX	Hamilton	60 min
Jun 15, 5:01 PM CDT	Severe Thunderstorm Warning	MEG	Fayette, Hardeman	44 min
Jun 15, 5:06 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lincoln, Moore	39 min
Jun 15, 5:07 PM CDT	Severe Thunderstorm Warning	FFC	Forsyth, Hall	38 min
Jun 15, 5:11 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury, Williamson	34 min
Jun 15, 5:12 PM CDT	Severe Thunderstorm Warning	MRX	Cherokee, Clay	37 min
Jun 15, 5:15 PM CDT	Severe Thunderstorm Warning	MEG	Fayette, Shelby	30 min
Jun 15, 5:16 PM CDT	Severe Thunderstorm Warning	MRX	Meigs, Rhea	37 min
Jun 15, 5:18 PM CDT	Severe Thunderstorm Warning	GSP	Henderson, Polk, Rutherford	27 min
Jun 15, 5:19 PM CDT	Severe Thunderstorm Warning	FFC	Carroll, Douglas, Haralson, Paulding, Polk	41 min
Jun 15, 5:23 PM CDT	Severe Thunderstorm Warning	OHX	Williamson	37 min
Jun 15, 5:26 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson	14 min
Jun 15, 5:29 PM CDT	Severe Thunderstorm Warning	MRX	Marion, Sequatchie	61 min
Jun 15, 5:40 PM CDT	Severe Thunderstorm Warning	GSP	Greenville, Laurens, Spartanburg	35 min
Jun 15, 5:41 PM CDT	Severe Thunderstorm Warning	MRX	Bradley	53 min
Jun 15, 5:42 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn	48 min
Jun 15, 5:43 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Benton, Marshall, Tippah	47 min
Jun 15, 5:43 PM CDT	Severe Thunderstorm Warning	OHX	Humphreys	32 min
Jun 15, 5:45 PM CDT	Severe Thunderstorm Warning	FFC	Cobb, Douglas	45 min
Jun 15, 5:45 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Moore	30 min
Jun 15, 5:47 PM CDT	Flash Flood Warning	OHX	Dickson, Hickman, Humphreys, Williamson	3 hr
Jun 15, 5:50 PM CDT	Flash Flood Warning	OHX	Grundy	3 hr
Jun 15, 6:00 PM CDT	Severe Thunderstorm Warning	MRX	Hamilton	45 min
Jun 15, 6:06 PM CDT	Severe Thunderstorm Warning	GSP	Elbert, Franklin, Habersham, Hart, Stephens	54 min
Jun 15, 6:09 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	19 min
Jun 15, 6:10 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	36 min
Jun 15, 6:10 PM CDT	Severe Thunderstorm Warning	FFC	Clayton, DeKalb, Douglas, Fayette, Fulton	65 min
Jun 15, 6:16 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison	29 min
Jun 15, 6:37 PM CDT	Severe Thunderstorm Warning	FFC	Gwinnett, Walton	53 min
Jun 15, 6:46 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	18 min
Jun 15, 6:50 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Tishomingo	40 min
Jun 15, 6:54 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Benton, Prentiss, Tippah, Tishomingo	51 min
Jun 15, 6:59 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	20 min
Jun 15, 7:02 PM CDT	Severe Thunderstorm Warning	OHX	Wayne	28 min
Jun 15, 7:05 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	25 min
Jun 15, 7:06 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	24 min
Jun 15, 7:08 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Marshall	22 min
Jun 15, 7:13 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	13 min
Jun 15, 7:15 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	29 min
Jun 15, 7:19 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	41 min
Jun 15, 7:25 PM CDT	Severe Thunderstorm Warning	FFC	Cherokee	35 min
Jun 15, 7:26 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale, Lawrence	49 min
Jun 15, 7:28 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	32 min
Jun 15, 7:31 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	29 min
Jun 15, 7:40 PM CDT	Severe Thunderstorm Warning	FFC	Cobb, Paulding	35 min
Jun 15, 7:43 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin	34 min
Jun 15, 7:45 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Prentiss, Tippah, Tishomingo	47 min
Jun 15, 7:46 PM CDT	Severe Thunderstorm Warning	FFC	Bartow	29 min
Jun 15, 7:56 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale, Lawrence, Limestone, Madison, Morgan	34 min
Jun 15, 8:06 PM CDT	Severe Thunderstorm Warning	HUN	Lincoln	39 min
Jun 15, 8:08 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb	22 min
Jun 15, 8:13 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	31 min
Jun 15, 8:15 PM CDT	Severe Thunderstorm Warning	FFC	Floyd, Polk	17 min
Jun 15, 8:23 PM CDT	Severe Thunderstorm Warning	HUN	Limestone, Madison, Morgan	37 min
Jun 15, 8:29 PM CDT	Severe Thunderstorm Warning	HUN	Franklin	16 min
Jun 15, 8:40 PM CDT	Severe Thunderstorm Warning	OHX	Macon	35 min
Jun 15, 8:43 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lincoln	17 min
Jun 15, 8:45 PM CDT	Flash Flood Warning	HUN	DeKalb, Jackson, Marshall	92 min
Jun 15, 8:50 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Macon, Putnam, Smith	25 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, 4.9 hours before the alert went out and 265 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: 1677 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 1517 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 88 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 15, 10:54 AM CDT	Mesoscale Discussion	SPC	Blount, Colbert, Cullman, Etowah, Fayette, Franklin and 16 more	2 hr
Jun 15, 3:34 PM CDT	Mesoscale Discussion	SPC	Colbert, DeKalb, Franklin, Jackson, Lauderdale, Lawrence and 3 more	116 min
Jun 15, 5:53 PM CDT	Mesoscale Discussion	SPC	Colbert, DeKalb, Franklin, Jackson, Lauderdale, Lawrence and 3 more	97 min
Jun 15, 6:35 PM CDT	Severe Thunderstorm Watch	SPC	Baldwin, Bibb, Bleckley, Burke, Butts, Chattahoochee and 55 more	5 hr
Jun 15, 2:13 PM CDT	Mesoscale Discussion	SPC	Montgomery, Stewart	2 hr

Nearby

Severe Thunderstorm Watches in Tennessee, 2011 Severe Thunderstorm Watches in Georgia, 2011 Severe Thunderstorm Watches in North Carolina, 2011 Every severe thunderstorm watch in 2011

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.