Alert archive / Tennessee / Tornado Watches in 2023

Tornado Watch 77

March 24, 202316 counties in Alabama; 28 counties in Tennessee

The Storm Prediction Center issued this tornado watch at Mar 24, 2023, 9:27 PM CDT for 16 counties in Alabama; 28 counties in Tennessee. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Mar 24, 2023, 9:27 PM CDT (02:27 UTC)
Expired: Mar 25, 2023, 2:36 AM CDT
In force: 5 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1 in
Strongest gust expected: 65 kt

All 44 counties

Colbert County, AL, Cullman County, AL, DeKalb County, AL, Fayette County, AL, Franklin County, AL, Jackson 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, Cannon County, TN, Cheatham County, TN, Coffee County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hickman County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Marshall County, TN, Maury County, TN, Moore County, TN, Perry County, TN, Putnam County, TN, Rutherford County, TN, Smith County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Northeast Alabama radar (KHTX), 91 km from the middle of the area, began a volume at 02:27 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: 30%
Ten or more severe wind reports: 70%
One or more gusts of 65 knots or more: 50%
Ten or more severe hail reports: 30%
One or more hailstones of 2 inches or more: 10%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Mar 24, 9:55 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Humphreys, Lewis, Maury and 1 more	35 min
Mar 24, 10:05 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lauderdale	40 min
Mar 24, 10:15 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Montgomery, Robertson	30 min
Mar 24, 10:20 PM CDT	Tornado Warning	HUN	Colbert, Lauderdale	40 min
Mar 24, 10:22 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	Bedford, Cheatham, Davidson, Marshall, Maury, Rutherford and 3 more	38 min
Mar 24, 10:35 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	Cheatham, Davidson, Montgomery, Robertson, Sumner	40 min
Mar 24, 10:41 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lauderdale, Lawrence	49 min
Mar 24, 10:52 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	BMX	Marion	53 min
Mar 24, 10:58 PM CDT	Tornado Warning	HUN	Colbert, Lauderdale, Lawrence, Limestone	47 min
Mar 24, 10:59 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	Davidson, Macon, Rutherford, Smith, Sumner, Trousdale and 2 more	46 min
Mar 24, 11:04 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BMX	Lamar	41 min
Mar 24, 11:12 PM CDT	Severe Thunderstorm Warning Considerable damage threat	HUN	Colbert, Lauderdale, Lawrence, Limestone, Madison, Morgan	63 min
Mar 24, 11:15 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BMX	Marion	45 min
Mar 24, 11:25 PM CDT	Tornado Warning	HUN	Franklin	21 min
Mar 24, 11:25 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	Giles, Marshall	26 min
Mar 24, 11:26 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Jackson, Putnam, Rutherford, Smith and 1 more	34 min
Mar 24, 11:39 PM CDT	Severe Thunderstorm Warning	HUN	Lincoln	36 min
Mar 24, 11:43 PM CDT	Severe Thunderstorm Warning	BMX	Winston	47 min
Mar 24, 11:45 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lawrence	45 min
Mar 24, 11:58 PM CDT	Tornado Warning	HUN	Franklin, Lincoln, Moore	32 min
Mar 25, 12:06 AM CDT	Severe Thunderstorm Warning	HUN	Jackson, Limestone, Madison	39 min
Mar 25, 12:09 AM CDT	Flash Flood Warning	BMX	Fayette, Lamar, Marion, Winston	3 hr
Mar 25, 12:13 AM CDT	Severe Thunderstorm Warning	HUN	Lawrence, Limestone, Madison, Marshall, Morgan	32 min
Mar 25, 12:21 AM CDT	Tornado Warning	HUN	Lawrence, Limestone, Madison, Marshall, Morgan	24 min
Mar 25, 12:22 AM CDT	Tornado Warning	HUN	Franklin, Moore	24 min
Mar 25, 12:27 AM CDT	Severe Thunderstorm Warning	HUN	Cullman, Marshall, Morgan	48 min
Mar 25, 12:41 AM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison	49 min
Mar 25, 12:41 AM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	Coffee, Grundy	34 min
Mar 25, 12:46 AM CDT	Tornado Warning	HUN	Jackson, Madison, Marshall, Morgan	29 min
Mar 25, 1:06 AM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson, Madison, Marshall	24 min
Mar 25, 1:08 AM CDT	Tornado Warning Tornado observed	HUN	DeKalb, Jackson, Marshall	37 min
Mar 25, 1:20 AM CDT	Tornado Warning	HUN	DeKalb, Jackson	25 min
Mar 25, 1:24 AM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	51 min
Mar 25, 1:29 AM CDT	Tornado Warning	HUN	DeKalb, Jackson	14 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 00:00Z, 2.5 hours before the alert went out and 109 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: 12 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1016 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 334 m²/s²
0-3 km storm-relative helicity: 420 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
Mar 24, 9:07 PM CDT	Mesoscale Discussion	SPC	Colbert, Cullman, Fayette, Franklin, Lamar, Lauderdale and 10 more	83 min
Mar 24, 9:57 PM CDT	Mesoscale Discussion	SPC	Colbert, Franklin, Marion	63 min
Mar 24, 10:55 PM CDT	Mesoscale Discussion	SPC	Colbert, Franklin, Lauderdale, Lawrence, Limestone, Madison	3 hr
Mar 24, 11:36 PM CDT	Mesoscale Discussion	SPC	Blount, Cullman, DeKalb, Etowah, Fayette, Jefferson and 9 more	114 min
Mar 25, 10:16 AM CDT	Severe Thunderstorm Watch	SPC	Houston	8 hr
Mar 25, 12:39 PM CDT	Mesoscale Discussion	SPC	Houston	66 min
Mar 24, 8:13 PM CDT	Mesoscale Discussion	SPC	Lafayette, Panola, Pontotoc, Tallahatchie, Union, Yalobusha	62 min
Mar 24, 9:27 PM CDT	Mesoscale Discussion	SPC	Calhoun, Carroll, Chickasaw, Clay, Monroe, Montgomery and 1 more	63 min
Mar 24, 8:34 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Cheatham, Chester, Crockett, Davidson and 18 more	116 min
Mar 25, 12:03 AM CDT	Severe Thunderstorm Watch	SPC	Anderson, Bledsoe, Blount, Bradley, Campbell, Hamilton and 13 more	5 hr
Mar 25, 1:54 AM CDT	Mesoscale Discussion	SPC	Anderson, Blount, Bradley, Hamilton, Knox, Loudon and 7 more	2 hr

Nearby

Tornado Watches in Tennessee, 2023 Tornado Watches in Alabama, 2023 Every tornado watch in 2023

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.