Alert archive / Tennessee / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 159, NWS Morristown, TN

August 4, 2022Greene County, Hamblen County, Hawkins County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Aug 4, 2022, 6:22 PM EDT for Greene County, Hamblen County, Hawkins County, Tennessee. It was in force for 53 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 4, 2022, 6:22 PM EDT (22:22 UTC)
Expired: Aug 4, 2022, 7:15 PM EDT
In force: 53 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Greene County, TN, Hamblen County, TN, Hawkins County, TN

The radar

The Knoxville radar (KMRX), 36 km from the middle of the area, began a volume at 22:25 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

Nashville Metro, TN (KBNA), launched 12:00Z, 10.4 hours before the alert went out and 322 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: 606 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 849 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -22 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 Aug 4, 3:25 PM EDT, 2 hours 57 minutes earlier.

Area forecast discussion, Aug 4, 3:25 PM EDT, 2 hours 57 minutes before

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Hazardous weather outlook, Aug 4, 3:29 PM EDT, 2 hours 53 minutes before

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In the hours before

Special weather statement, Aug 4, 5:40 PM EDT, 42 minutes before

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Special weather statement, Aug 4, 5:44 PM EDT, 38 minutes before

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Special weather statement, Aug 4, 5:50 PM EDT, 32 minutes before

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Special weather statement, Aug 4, 6:12 PM EDT, 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
Aug 3, 8:12 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox, Loudon, Monroe, Morgan, Roane	48 min
Aug 3, 8:23 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox, Sevier	52 min
Aug 3, 8:42 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Loudon, Morgan, Roane	48 min
Aug 3, 8:59 PM EDT	Special Weather Statement	MRX	Roane	46 min
Aug 3, 9:05 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Knox, Union	55 min
Aug 3, 9:09 PM EDT	Special Weather Statement	MRX	Cocke, Jefferson, Sevier	51 min
Aug 3, 9:10 PM EDT	Areal Flood Advisory	MRX	Blount, Knox	3 hr
Aug 3, 9:40 PM EDT	Areal Flood Advisory	MRX	Anderson, Knox	3 hr
Aug 3, 9:49 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Claiborne, Morgan, Scott, Union	71 min
Aug 3, 9:54 PM EDT	Special Weather Statement	MRX	Grainger, Hamblen, Jefferson	66 min
Aug 3, 10:41 PM EDT	Areal Flood Advisory	MRX	Blount, Grainger, Jefferson, Knox, Sevier	3 hr
Aug 3, 10:50 PM EDT	Special Weather Statement	MRX	Knox	40 min
Aug 3, 10:52 PM EDT	Special Weather Statement	MRX	Bradley	38 min
Aug 4, 12:21 AM EDT	Areal Flood Advisory	MRX	Anderson, Campbell, Scott, Union	114 min
Aug 4, 5:40 PM EDT	Special Weather Statement	MRX	Blount	50 min
Aug 4, 5:44 PM EDT	Special Weather Statement	MRX	Sullivan	46 min
Aug 4, 5:50 PM EDT	Special Weather Statement	MRX	Greene	40 min
Aug 4, 6:00 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Loudon	45 min
Aug 4, 6:12 PM EDT	Special Weather Statement	MRX	Greene	48 min
Aug 4, 6:43 PM EDT	Special Weather Statement	MRX	Anderson	47 min
Aug 4, 6:53 PM EDT	Special Weather Statement	MRX	Hawkins	52 min
Aug 4, 7:38 PM EDT	Special Weather Statement	MRX	Union	52 min
Aug 3, 11:33 PM EDT	Special Weather Statement	MRX	Wise, City of Norton	42 min
Aug 4, 12:19 AM EDT	Areal Flood Advisory	MRX	Lee, Scott, Wise, City of Norton	116 min
Aug 4, 6:36 PM EDT	Special Weather Statement	MRX	Washington	39 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2022 Every severe thunderstorm warning in 2022

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.