Alert archive / Tennessee / Tornado Watches in 2010

Tornado Watch 723

October 26, 201018 counties in Alabama; 47 counties in Tennessee

The Storm Prediction Center issued this tornado watch at Oct 26, 2010, 9:27 AM CDT for 18 counties in Alabama; 47 counties in Tennessee. It was in force for 11 hr.

The area

The outline as issued.

The facts

Issued: Oct 26, 2010, 9:27 AM CDT (14:27 UTC)
Expired: Oct 26, 2010, 8:00 PM CDT
In force: 11 hr
Issued by: the Storm Prediction Center
Particularly dangerous situation: Yes
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

All 65 counties

Blount County, AL, Colbert County, AL, Cullman County, AL, DeKalb 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, Walker County, AL, Winston County, AL, Bedford County, TN, Benton County, TN, Bledsoe County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Scott County, TN, Sequatchie County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 93 km from the middle of the area, began a volume at 14:27 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: 70%
One or more EF2 to EF5 tornadoes: 60%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 60%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 20%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Oct 26, 10:10 AM CDT	Tornado Warning	OHX	Montgomery	10 min
Oct 26, 10:18 AM CDT	Tornado Warning	OHX	Perry, Wayne	27 min
Oct 26, 10:40 AM CDT	Tornado Warning	OHX	Hickman, Lewis, Perry	35 min
Oct 26, 10:46 AM CDT	Tornado Warning	OHX	Wayne	29 min
Oct 26, 11:08 AM CDT	Severe Thunderstorm Warning	OHX	Hickman, Maury, Williamson	37 min
Oct 26, 11:10 AM CDT	Tornado Warning	OHX	Lawrence, Lewis, Wayne	35 min
Oct 26, 11:27 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Williamson	33 min
Oct 26, 11:29 AM CDT	Tornado Warning	HUN	Colbert, Lauderdale	31 min
Oct 26, 11:33 AM CDT	Tornado Warning	OHX	Giles, Lawrence, Lewis, Maury	27 min
Oct 26, 11:43 AM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman	32 min
Oct 26, 11:51 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Wilson	24 min
Oct 26, 11:56 AM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	34 min
Oct 26, 12:00 PM CDT	Tornado Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	30 min
Oct 26, 12:12 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Smith, Sumner, Trousdale, Wilson	33 min
Oct 26, 12:17 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	43 min
Oct 26, 12:20 PM CDT	Severe Thunderstorm Warning	BMX	Marion, Winston	25 min
Oct 26, 12:24 PM CDT	Tornado Warning	OHX	Macon, Smith, Sumner, Trousdale, Wilson	36 min
Oct 26, 12:28 PM CDT	Tornado Warning	OHX	Marshall, Rutherford, Williamson	32 min
Oct 26, 12:29 PM CDT	Tornado Warning	HUN	Franklin, Lawrence	31 min
Oct 26, 12:30 PM CDT	Tornado Warning	BMX	Marion	15 min
Oct 26, 12:44 PM CDT	Tornado Warning	OHX	Clay, Macon, Trousdale	31 min
Oct 26, 12:48 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Giles, Marshall	27 min
Oct 26, 12:52 PM CDT	Tornado Warning	OHX	DeKalb, Rutherford, Smith, Wilson	23 min
Oct 26, 12:55 PM CDT	Tornado Warning	HUN	Lawrence	35 min
Oct 26, 1:00 PM CDT	Tornado Warning	OHX	Bedford, Marshall	30 min
Oct 26, 1:09 PM CDT	Tornado Warning	OHX	DeKalb, Jackson, Putnam, Smith, Wilson	36 min
Oct 26, 1:12 PM CDT	Tornado Warning	MRX	Morgan, Roane	33 min
Oct 26, 1:19 PM CDT	Tornado Warning	HUN	Lawrence, Limestone, Morgan	26 min
Oct 26, 1:23 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Coffee, Rutherford	37 min
Oct 26, 1:25 PM CDT	Tornado Warning	OHX	Bedford, Coffee, Rutherford	35 min
Oct 26, 1:40 PM CDT	Tornado Warning	OHX	Bedford, Cannon, Coffee, Rutherford, Warren	35 min
Oct 26, 1:43 PM CDT	Tornado Warning	HUN	Limestone, Madison	32 min
Oct 26, 1:45 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Overton, Putnam	45 min
Oct 26, 2:06 PM CDT	Tornado Warning	OHX	Cannon, DeKalb, Warren, White	24 min
Oct 26, 2:08 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin	37 min
Oct 26, 2:08 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Fentress, Overton, Pickett	37 min
Oct 26, 2:11 PM CDT	Tornado Warning	HUN	Jackson, Madison	34 min
Oct 26, 2:16 PM CDT	Tornado Warning	HUN	Madison, Marshall, Morgan	29 min
Oct 26, 2:24 PM CDT	Severe Thunderstorm Warning	BMX	Marion	23 min
Oct 26, 2:26 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, DeKalb, Fentress, Overton, Putnam, White	34 min
Oct 26, 2:28 PM CDT	Tornado Warning	BMX	Walker, Winston	32 min
Oct 26, 2:38 PM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Van Buren, Warren, White	22 min
Oct 26, 2:39 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Walker	51 min
Oct 26, 2:42 PM CDT	Tornado Warning	HUN	Jackson, Madison, Morgan	33 min
Oct 26, 2:42 PM CDT	Tornado Warning	HUN	Franklin	33 min
Oct 26, 2:46 PM CDT	Tornado Warning	BMX	Fayette, Walker	29 min
Oct 26, 2:49 PM CDT	Tornado Warning	HUN	Cullman	41 min
Oct 26, 2:57 PM CDT	Tornado Warning	MRX	Marion	48 min
Oct 26, 3:00 PM CDT	Tornado Warning	HUN	Lawrence, Limestone, Morgan	30 min
Oct 26, 3:13 PM CDT	Tornado Warning	HUN	Jackson	32 min
Oct 26, 3:14 PM CDT	Tornado Warning	BMX	Walker, Winston	38 min
Oct 26, 3:18 PM CDT	Severe Thunderstorm Warning	MRX	Morgan, Scott	42 min
Oct 26, 3:22 PM CDT	Tornado Warning	BMX	Blount	38 min
Oct 26, 3:24 PM CDT	Tornado Warning	HUN	Cullman	21 min
Oct 26, 3:24 PM CDT	Tornado Warning	MRX	Bledsoe, Hamilton, Sequatchie	51 min
Oct 26, 3:26 PM CDT	Tornado Warning	MRX	Morgan, Scott	34 min
Oct 26, 3:27 PM CDT	Severe Thunderstorm Warning	HUN	Limestone, Madison	48 min
Oct 26, 3:27 PM CDT	Tornado Warning	HUN	Lincoln, Moore	33 min
Oct 26, 3:29 PM CDT	Tornado Warning	HUN	Limestone, Madison, Morgan	31 min
Oct 26, 3:42 PM CDT	Severe Thunderstorm Warning	MRX	Morgan	33 min
Oct 26, 3:47 PM CDT	Tornado Warning	HUN	Marshall	28 min
Oct 26, 3:47 PM CDT	Severe Thunderstorm Warning	OHX	Van Buren, Warren, White	28 min
Oct 26, 3:53 PM CDT	Tornado Warning	HUN	Morgan	37 min
Oct 26, 3:55 PM CDT	Tornado Warning	HUN	Madison	35 min
Oct 26, 3:55 PM CDT	Tornado Warning	MRX	Campbell, Claiborne, Scott	35 min
Oct 26, 4:00 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lincoln, Moore	30 min
Oct 26, 4:03 PM CDT	Tornado Warning	MRX	Campbell, Morgan, Scott	27 min
Oct 26, 4:11 PM CDT	Severe Thunderstorm Warning	MRX	Hamilton, Marion, Sequatchie	49 min
Oct 26, 4:13 PM CDT	Tornado Warning	HUN	DeKalb, Marshall	47 min
Oct 26, 4:13 PM CDT	Tornado Warning	HUN	Jackson, Madison	32 min
Oct 26, 4:14 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Van Buren, White	31 min
Oct 26, 4:21 PM CDT	Tornado Warning	HUN	Madison, Morgan	24 min
Oct 26, 4:41 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland	19 min
Oct 26, 4:44 PM CDT	Tornado Warning	HUN	Jackson	36 min
Oct 26, 4:57 PM CDT	Tornado Warning	HUN	DeKalb	18 min
Oct 26, 5:06 PM CDT	Tornado Warning	HUN	DeKalb, Jackson, Marshall	24 min
Oct 26, 5:07 PM CDT	Tornado Warning	HUN	Cullman	23 min
Oct 26, 5:09 PM CDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Meigs, Rhea, Roane, Sequatchie	66 min
Oct 26, 5:15 PM CDT	Tornado Warning	BMX	Blount	30 min
Oct 26, 5:16 PM CDT	Tornado Warning	MRX	Hamilton, Marion	44 min
Oct 26, 5:17 PM CDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Morgan, Scott	43 min
Oct 26, 5:20 PM CDT	Tornado Warning	BMX	Winston	11 min
Oct 26, 5:25 PM CDT	Tornado Warning	HUN	Cullman, Morgan	35 min
Oct 26, 5:37 PM CDT	Tornado Warning	BMX	Blount	20 min
Oct 26, 5:39 PM CDT	Tornado Warning	HUN	DeKalb, Jackson, Marshall	51 min
Oct 26, 5:54 PM CDT	Tornado Warning	BMX	Walker, Winston	13 min
Oct 26, 6:13 PM CDT	Tornado Warning	HUN	DeKalb, Marshall	32 min
Oct 26, 6:18 PM CDT	Tornado Warning	HUN	Marshall	27 min
Oct 26, 6:29 PM CDT	Tornado Warning	HUN	DeKalb	31 min
Oct 26, 6:40 PM CDT	Tornado Warning	HUN	DeKalb, Jackson, Marshall	23 min
Oct 26, 6:43 PM CDT	Tornado Warning	HUN	DeKalb	32 min
Oct 26, 6:49 PM CDT	Tornado Warning	BMX	Blount, Jefferson	41 min
Oct 26, 6:50 PM CDT	Tornado Warning	BMX	Fayette, Walker	26 min
Oct 26, 6:55 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Etowah	50 min
Oct 26, 7:30 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb	29 min
Oct 26, 7:41 PM CDT	Tornado Warning	BMX	Jefferson	17 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

Nashville Metro, TN (KBNA), launched 12:00Z, 2.5 hours before the alert went out and 80 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: 324 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 796 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 403 m²/s²
0-3 km storm-relative helicity: 486 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 3.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 26, 6:00 AM CDT	Mesoscale Discussion	SPC	Colbert, Franklin, Lauderdale, Lawrence, Limestone	2 hr
Oct 26, 8:54 AM CDT	Mesoscale Discussion	SPC	Colbert, Cullman, Franklin, Jackson, Lauderdale, Lawrence and 7 more	66 min
Oct 26, 11:57 AM CDT	Mesoscale Discussion	SPC	DeKalb, Jackson, Lauderdale, Lawrence, Limestone, Madison and 3 more	93 min
Oct 26, 2:59 PM CDT	Tornado Watch	SPC	Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 25 more	5 hr
Oct 26, 3:44 PM CDT	Mesoscale Discussion	SPC	DeKalb, Jackson, Lawrence, Madison, Morgan	61 min
Oct 26, 6:32 PM CDT	Mesoscale Discussion	SPC	Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 18 more	58 min
Oct 26, 3:38 AM CDT	Mesoscale Discussion	SPC	Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 14 more	2 hr
Oct 26, 4:05 AM CDT	Tornado Watch	SPC	Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more	8 hr
Oct 26, 7:55 AM CDT	Tornado Watch	SPC	Adair, Allen, Anderson, Barren, Bath, Boone and 74 more	7 hr
Oct 26, 12:09 PM CDT	Mesoscale Discussion	SPC	Boyd, Breathitt, Carter, Elliott, Floyd, Greenup and 10 more	66 min
Oct 26, 12:36 PM CDT	Tornado Watch	SPC	Bath, Bell, Boyd, Breathitt, Carter, Clay and 31 more	7 hr
Oct 26, 4:45 PM CDT	Mesoscale Discussion	SPC	Boyd, Breathitt, Carter, Elliott, Floyd, Greenup and 10 more	90 min
Oct 26, 10:05 AM CDT	Mesoscale Discussion	SPC	Attala, Carroll, Choctaw, Claiborne, Copiah, Hinds and 20 more	115 min
Oct 26, 11:26 AM CDT	Mesoscale Discussion	SPC	Alcorn, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 24 more	64 min
Oct 26, 11:42 AM CDT	Tornado Watch	SPC	Alcorn, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 35 more	7 hr
Oct 26, 3:12 PM CDT	Mesoscale Discussion	SPC	Attala, Choctaw, Claiborne, Clay, Copiah, Hinds and 14 more	93 min
Oct 26, 1:16 PM CDT	Tornado Watch	SPC	Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more	8 hr

Nearby

Tornado Watches in Tennessee, 2010 Tornado Watches in Alabama, 2010 Every 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.