Alert archive / Tennessee / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 4, NWS Morristown, TN

February 28, 20248 counties in Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Feb 28, 2024, 11:53 AM EST for 8 counties in Tennessee. It was in force for 52 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: Feb 28, 2024, 11:53 AM EST (16:53 UTC)
Expired: Feb 28, 2024, 12:45 PM EST
In force: 52 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Blount County, TN, Knox County, TN, Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Rhea County, TN, Roane County, TN

The radar

The Knoxville radar (KMRX), 107 km from the middle of the area, began a volume at 16:52 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 nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 4.9 hours before the alert went out and 254 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 803 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 398 m²/s²
0-3 km storm-relative helicity: 493 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Morristown, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 28, 10:15 AM EST, 1 hour 38 minutes earlier.

Area forecast discussion, Feb 28, 10:15 AM EST, 1 hour 38 minutes before

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Hazardous weather outlook, Feb 28, 4:03 AM EST, 7 hours 50 minutes before

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In the hours before

Special weather statement, Feb 28, 10:48 AM EST, 1 hour 5 minutes before

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Local storm report, Feb 28, 11:01 AM EST, 52 minutes before

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Special weather statement, Feb 28, 11:01 AM EST, 52 minutes before

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Special weather statement, Feb 28, 11:12 AM EST, 41 minutes before

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Special weather statement, Feb 28, 11:30 AM EST, 23 minutes before

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Special weather statement, Feb 28, 11:43 AM EST, 10 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 10:12 AM EST	Special Weather Statement	MRX	Anderson, Campbell, Morgan, Scott	48 min
Feb 28, 10:32 AM EST	Special Weather Statement	MRX	Claiborne, Hancock	43 min
Feb 28, 10:48 AM EST	Special Weather Statement	MRX	Bledsoe, Meigs, Rhea, Roane, Sequatchie	42 min
Feb 28, 10:58 AM EST	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Marion, Sequatchie	47 min
Feb 28, 11:01 AM EST	Special Weather Statement	MRX	Anderson, Campbell, Morgan, Union	44 min
Feb 28, 11:12 AM EST	Special Weather Statement	MRX	Claiborne, Hancock	48 min
Feb 28, 11:30 AM EST	Special Weather Statement	MRX	Bledsoe, Loudon, McMinn, Meigs, Rhea, Roane	45 min
Feb 28, 11:43 AM EST	Special Weather Statement	MRX	Bradley, Hamilton	47 min
Feb 28, 11:54 AM EST	Special Weather Statement	MRX	Hancock, Hawkins	51 min
Feb 28, 12:15 PM EST	Severe Thunderstorm Warning Considerable damage threat	MRX	Blount, Jefferson, Knox, Loudon, Sevier	45 min
Feb 28, 12:19 PM EST	Special Weather Statement	MRX	Bradley, Polk	41 min
Feb 28, 12:33 PM EST	Severe Thunderstorm Warning Considerable damage threat	MRX	Blount, Cocke, Greene, Hamblen, Hawkins, Jefferson and 2 more	42 min
Feb 28, 12:35 PM EST	Severe Thunderstorm Warning	MRX	Blount, Cocke, Jefferson, Knox, Sevier	40 min
Feb 28, 12:39 PM EST	Severe Thunderstorm Warning	MRX	Carter, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more	51 min
Feb 28, 1:13 PM EST	Special Weather Statement	MRX	Cocke, Greene, Unicoi	32 min
Feb 28, 1:16 PM EST	Special Weather Statement	MRX	Washington	29 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2024 Every severe thunderstorm warning in 2024

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.