Alert archive / Tennessee / Tornado Watches in 2013

Tornado Watch 14

January 30, 201322 counties in Alabama; 25 counties in Tennessee

The Storm Prediction Center issued this tornado watch at Jan 30, 2013, 1:46 AM CST for 22 counties in Alabama; 25 counties in Tennessee. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Jan 30, 2013, 1:46 AM CST (07:46 UTC)
Expired: Jan 30, 2013, 10:00 AM CST
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1 in
Strongest gust expected: 60 kt

All 47 counties

Blount County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Fayette County, AL, Franklin County, AL, Greene 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, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Bedford County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Jackson County, TN, Lincoln County, TN, Macon County, TN, Marshall County, TN, Moore County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rutherford County, TN, Smith County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Wilson County, TN

The radar

The Northeast Alabama radar (KHTX), 61 km from the middle of the area, began a volume at 07:49 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: 40%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 30%
One or more gusts of 65 knots or more: 30%
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: 70%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jan 30, 2:46 AM CST	Severe Thunderstorm Warning	OHX	Dickson, Giles, Hickman, Lawrence, Lewis, Maury and 2 more	44 min
Jan 30, 2:54 AM CST	Tornado Warning	HUN	Colbert, Lauderdale	36 min
Jan 30, 3:01 AM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Macon, Robertson, Rutherford, Sumner and 3 more	59 min
Jan 30, 3:04 AM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lauderdale	26 min
Jan 30, 3:16 AM CST	Tornado Warning	OHX	Davidson, Sumner, Wilson	29 min
Jan 30, 3:16 AM CST	Tornado Warning	OHX	Marshall, Maury, Williamson	44 min
Jan 30, 3:26 AM CST	Severe Thunderstorm Warning	OHX	Bedford, Coffee, Giles, Lawrence, Marshall, Maury and 2 more	64 min
Jan 30, 3:27 AM CST	Tornado Warning	OHX	Davidson, Rutherford, Williamson, Wilson	33 min
Jan 30, 3:28 AM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lauderdale	32 min
Jan 30, 3:35 AM CST	Tornado Warning	OHX	Macon, Smith, Sumner, Trousdale, Wilson	40 min
Jan 30, 3:44 AM CST	Severe Thunderstorm Warning	OHX	Cannon, Clay, DeKalb, Jackson, Macon, Putnam and 5 more	61 min
Jan 30, 3:46 AM CST	Tornado Warning	OHX	Bedford, Marshall, Rutherford, Williamson	29 min
Jan 30, 3:53 AM CST	Tornado Warning	OHX	Cannon, DeKalb, Rutherford, Smith, Wilson	37 min
Jan 30, 3:56 AM CST	Tornado Warning	OHX	Bedford, Giles, Marshall, Maury	34 min
Jan 30, 4:09 AM CST	Tornado Warning	OHX	Clay, Jackson, Overton	36 min
Jan 30, 4:16 AM CST	Tornado Warning	OHX	Bedford, Cannon, Coffee, Rutherford, Warren	29 min
Jan 30, 4:28 AM CST	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Giles, Grundy, Lawrence and 5 more	62 min
Jan 30, 4:33 AM CST	Tornado Warning	OHX	Cannon, DeKalb, Jackson, Overton, Putnam, Smith and 1 more	27 min
Jan 30, 4:34 AM CST	Severe Thunderstorm Warning	BMX	Lamar, Marion	41 min
Jan 30, 4:42 AM CST	Severe Thunderstorm Warning	OHX	Clay, Cumberland, DeKalb, Fentress, Jackson, Overton and 3 more	78 min
Jan 30, 4:42 AM CST	Tornado Warning	OHX	Bedford, Cannon, Coffee, Rutherford, Warren	48 min
Jan 30, 4:43 AM CST	Tornado Warning	OHX	Bedford, Coffee, Grundy, Marshall	47 min
Jan 30, 4:47 AM CST	Severe Thunderstorm Warning	HUN	Limestone, Madison	43 min
Jan 30, 4:52 AM CST	Tornado Warning	HUN	Lincoln	23 min
Jan 30, 5:16 AM CST	Severe Thunderstorm Warning	HUN	Franklin, Lawrence	29 min
Jan 30, 5:23 AM CST	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion, Walker, Winston	52 min
Jan 30, 5:24 AM CST	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Cumberland, Grundy, Rutherford and 3 more	66 min
Jan 30, 5:30 AM CST	Tornado Warning	OHX	Cannon, Coffee, Grundy, Van Buren, Warren	45 min
Jan 30, 5:39 AM CST	Tornado Warning	HUN	Lawrence, Limestone, Morgan	36 min
Jan 30, 5:44 AM CST	Tornado Warning	BMX	Winston	31 min
Jan 30, 5:49 AM CST	Tornado Warning	BMX	Tuscaloosa, Walker	41 min
Jan 30, 5:55 AM CST	Tornado Warning	HUN	Cullman	35 min
Jan 30, 5:57 AM CST	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Pickett, Putnam, White	63 min
Jan 30, 6:07 AM CST	Severe Thunderstorm Warning	HUN	Cullman, Lawrence, Morgan	23 min
Jan 30, 6:26 AM CST	Severe Thunderstorm Warning	HUN	Madison, Morgan	34 min
Jan 30, 6:33 AM CST	Tornado Warning	HUN	Cullman	27 min
Jan 30, 6:49 AM CST	Severe Thunderstorm Warning	BMX	Tuscaloosa	56 min
Jan 30, 7:10 AM CST	Severe Thunderstorm Warning	HUN	Marshall	35 min
Jan 30, 7:18 AM CST	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	27 min
Jan 30, 7:28 AM CST	Severe Thunderstorm Warning	BMX	Sumter	47 min
Jan 30, 7:29 AM CST	Severe Thunderstorm Warning	HUN	Jackson, Marshall	46 min
Jan 30, 9:43 AM CST	Flash Flood Warning	BMX	Jefferson	3 hr

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 00:00Z, 7.8 hours before the alert went out and 150 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: 91 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 520 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 345 m²/s²
0-3 km storm-relative helicity: 364 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 29, 9:49 PM CST	Mesoscale Discussion	SPC	Colbert, Franklin, Lauderdale	116 min
Jan 30, 1:31 AM CST	Mesoscale Discussion	SPC	Blount, Calhoun, Cherokee, Colbert, Cullman, DeKalb and 17 more	29 min
Jan 30, 4:27 AM CST	Mesoscale Discussion	SPC	Mobile, Washington	93 min
Jan 30, 5:01 AM CST	Mesoscale Discussion	SPC	Autauga, Bibb, Bullock, Butler, Calhoun, Chambers and 26 more	29 min
Jan 30, 5:15 AM CST	Tornado Watch	SPC	Autauga, Baldwin, Barbour, Bibb, Bullock, Butler and 34 more	7 hr
Jan 30, 7:43 AM CST	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 36 more	62 min
Jan 30, 10:09 AM CST	Mesoscale Discussion	SPC	Barbour, Bullock, Chambers, Clay, Cleburne, Crenshaw and 9 more	96 min
Jan 30, 11:50 AM CST	Mesoscale Discussion	SPC	Bullock, Chambers, Elmore, Lee, Macon, Montgomery and 3 more	85 min
Jan 30, 12:19 PM CST	Tornado Watch	SPC	Barbour, Bullock, Butler, Chambers, Coffee, Conecuh and 16 more	9 hr
Jan 29, 7:31 PM CST	Mesoscale Discussion	SPC	Chester, Crockett, Fayette, Hardeman, Haywood, Lauderdale and 4 more	119 min
Jan 29, 10:07 PM CST	Tornado Watch	SPC	Benton, Carroll, Cheatham, Chester, Davidson, Decatur and 20 more	6 hr
Jan 30, 3:03 AM CST	Mesoscale Discussion	SPC	Benton, Cheatham, Chester, Davidson, Decatur, Dickson and 16 more	57 min
Jan 30, 4:51 AM CST	Tornado Watch	SPC	Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more	7 hr
Jan 30, 6:38 AM CST	Mesoscale Discussion	SPC	Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more	97 min

Nearby

Tornado Watches in Tennessee, 2013 Tornado Watches in Alabama, 2013 Every tornado watch in 2013

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.