Alert archive / Tennessee / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 152, NWS Morristown, TN

August 17, 2026Marion County, Sequatchie County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Aug 17, 2026, 5:26 PM CDT for Marion County, Sequatchie County, Tennessee. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 17, 2026, 5:26 PM CDT (22:26 UTC)
Expired: Aug 17, 2026, 6:03 PM CDT
In force: 37 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Marion County, TN, Sequatchie County, TN

The radar

The Northeast Alabama radar (KHTX), 63 km from the middle of the area, began a volume at 22:28 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 17, 1:35 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.4 hours before the alert went out and 138 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: 1267 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 1083 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.9

Open this sounding in Storm Lab

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 17, 1:51 PM CDT	Severe Thunderstorm Warning	MRX	Campbell, Scott	54 min
Aug 17, 2:26 PM CDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Claiborne, Scott, Union	64 min
Aug 17, 2:26 PM CDT	Severe Thunderstorm Warning	MRX	Johnson, Sullivan	49 min
Aug 17, 2:38 PM CDT	Special Weather Statement	MRX	McMinn, Monroe	67 min
Aug 17, 2:48 PM CDT	Special Weather Statement	MRX	Johnson	42 min
Aug 17, 2:50 PM CDT	Severe Thunderstorm Warning	MRX	Anderson, Knox	40 min
Aug 17, 2:53 PM CDT	Severe Thunderstorm Warning	MRX	Sullivan	52 min
Aug 17, 2:59 PM CDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Rhea, Sequatchie	61 min
Aug 17, 3:07 PM CDT	Severe Thunderstorm Warning	MRX	Anderson, Claiborne, Grainger, Hancock, Knox, Union	53 min
Aug 17, 3:13 PM CDT	Severe Thunderstorm Warning	MRX	Loudon, McMinn, Meigs, Monroe, Roane	62 min
Aug 17, 3:21 PM CDT	Areal Flood Advisory	MRX	Johnson, Sullivan	3 hr
Aug 17, 3:27 PM CDT	Severe Thunderstorm Warning	MRX	Grainger, Jefferson, Knox	48 min
Aug 17, 3:30 PM CDT	Areal Flood Advisory	MRX	Anderson, Campbell, Grainger, Jefferson, Knox, Morgan and 3 more	3 hr
Aug 17, 3:31 PM CDT	Special Weather Statement	MRX	Johnson	44 min
Aug 17, 3:32 PM CDT	Areal Flood Advisory	MRX	Claiborne	3 hr
Aug 17, 3:33 PM CDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Morgan, Roane, Sevier	57 min
Aug 17, 3:42 PM CDT	Severe Thunderstorm Warning	MRX	Blount, Loudon	20 min
Aug 17, 3:43 PM CDT	Severe Thunderstorm Warning	MRX	Grainger, Greene, Hamblen, Hancock, Hawkins	62 min
Aug 17, 3:46 PM CDT	Severe Thunderstorm Warning	MRX	Cocke, Grainger, Greene, Hamblen, Jefferson	44 min
Aug 17, 3:47 PM CDT	Special Weather Statement	MRX	Sullivan	43 min
Aug 17, 3:49 PM CDT	Special Weather Statement	MRX	Meigs	41 min
Aug 17, 3:59 PM CDT	Severe Thunderstorm Warning	MRX	Blount, Cocke, Sevier	61 min
Aug 17, 4:01 PM CDT	Special Weather Statement	MRX	Loudon	44 min
Aug 17, 4:04 PM CDT	Severe Thunderstorm Warning	MRX	Hawkins, Sullivan	41 min
Aug 17, 4:07 PM CDT	Special Weather Statement	MRX	Morgan	53 min
Aug 17, 4:09 PM CDT	Special Weather Statement	MRX	Polk	51 min
Aug 17, 4:12 PM CDT	Areal Flood Advisory	MRX	Carter, Johnson, Sullivan	3 hr
Aug 17, 4:18 PM CDT	Flash Flood Warning	MRX	Anderson, Campbell, Knox, Morgan, Scott	3 hr
Aug 17, 4:27 PM CDT	Severe Thunderstorm Warning	MRX	Cocke, Greene, Unicoi, Washington	48 min
Aug 17, 4:28 PM CDT	Special Weather Statement	MRX	Hamilton	47 min
Aug 17, 4:29 PM CDT	Special Weather Statement	MRX	Knox, Sevier	31 min
Aug 17, 4:31 PM CDT	Special Weather Statement	MRX	McMinn, Monroe, Polk	44 min
Aug 17, 4:32 PM CDT	Flash Flood Warning	MRX	Carter, Johnson, Sullivan	3 hr
Aug 17, 4:36 PM CDT	Special Weather Statement	MRX	Johnson, Sullivan	39 min
Aug 17, 4:54 PM CDT	Areal Flood Advisory	MRX	Anderson, Blount, Knox, Roane, Sevier	3 hr
Aug 17, 4:56 PM CDT	Severe Thunderstorm Warning	MRX	Carter, Johnson, Sullivan, Washington	34 min
Aug 17, 4:57 PM CDT	Special Weather Statement	MRX	Blount, Sevier	48 min
Aug 17, 5:00 PM CDT	Special Weather Statement	MRX	Monroe	45 min
Aug 17, 5:03 PM CDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton, Polk	42 min
Aug 17, 5:03 PM CDT	Severe Thunderstorm Warning	MRX	Blount, Cocke, Sevier	27 min
Aug 17, 5:07 PM CDT	Severe Thunderstorm Warning	MRX	Unicoi, Washington	23 min
Aug 17, 5:11 PM CDT	Areal Flood Advisory	MRX	Blount, Cocke, Knox, Sevier	3 hr
Aug 17, 5:12 PM CDT	Severe Thunderstorm Warning	MRX	Monroe	33 min
Aug 17, 5:28 PM CDT	Special Weather Statement	MRX	Carter	32 min
Aug 17, 5:33 PM CDT	Severe Thunderstorm Warning	MRX	Monroe	57 min
Aug 17, 5:59 PM CDT	Special Weather Statement	MRX	Sullivan	46 min
Aug 17, 6:00 PM CDT	Special Weather Statement	MRX	Bradley	45 min
Aug 17, 6:10 PM CDT	Special Weather Statement	MRX	Marion	35 min
Aug 17, 6:31 PM CDT	Severe Thunderstorm Warning	MRX	Marion	29 min
Aug 17, 6:38 PM CDT	Special Weather Statement	MRX	Johnson, Sullivan	52 min
Aug 16, 9:31 PM CDT	Severe Thunderstorm Warning	MRX	Lee, Scott, Wise, City of Norton	44 min
Aug 16, 10:06 PM CDT	Severe Thunderstorm Warning	MRX	Russell, Scott, Washington, Wise, City of Bristol	39 min
Aug 16, 10:07 PM CDT	Special Weather Statement	MRX	Scott	38 min
Aug 16, 10:18 PM CDT	Special Weather Statement	MRX	Russell	42 min
Aug 17, 12:45 PM CDT	Special Weather Statement	MRX	Wise, City of Norton	30 min
Aug 17, 1:15 PM CDT	Special Weather Statement	MRX	Russell	45 min
Aug 17, 1:42 PM CDT	Special Weather Statement	MRX	Washington	48 min
Aug 17, 1:45 PM CDT	Severe Thunderstorm Warning	MRX	Russell, Washington	45 min
Aug 17, 1:51 PM CDT	Special Weather Statement	MRX	Wise, City of Norton	39 min
Aug 17, 2:00 PM CDT	Areal Flood Advisory	MRX	Russell, Washington, Wise, City of Norton	3 hr
Aug 17, 2:09 PM CDT	Severe Thunderstorm Warning	MRX	Russell, Scott, Washington, Wise	51 min
Aug 17, 2:40 PM CDT	Areal Flood Advisory	MRX	Russell, Scott, Washington, Wise	3 hr
Aug 17, 2:57 PM CDT	Flash Flood Warning	MRX	Russell, Scott, Washington	4 hr
Aug 17, 3:02 PM CDT	Special Weather Statement	MRX	Washington	43 min
Aug 17, 3:22 PM CDT	Special Weather Statement	MRX	City of Bristol	23 min
Aug 17, 3:57 PM CDT	Special Weather Statement	MRX	City of Norton	33 min
Aug 17, 4:10 PM CDT	Special Weather Statement	MRX	Lee	35 min
Aug 17, 4:54 PM CDT	Special Weather Statement	MRX	Scott	36 min
Aug 17, 4:24 PM CDT	Special Weather Statement	MRX	Cherokee	51 min
Aug 17, 5:15 PM CDT	Special Weather Statement	MRX	Cherokee	45 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2026 Every severe thunderstorm warning in 2026

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.