Alert archive / Tennessee / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 161, NWS Morristown, TN

July 25, 2023Roane County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 25, 2023, 3:22 PM EDT for Roane County, Tennessee. It was in force for 33 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: Jul 25, 2023, 3:22 PM EDT (19:22 UTC)
Expired: Jul 25, 2023, 3:55 PM EDT
In force: 33 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Roane County, TN

The radar

The Knoxville radar (KMRX), 107 km from the middle of the area, began a volume at 19:24 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, 7.4 hours before the alert went out and 276 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: 97 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 1371 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 21 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 Jul 25, 1:35 PM EDT, 1 hour 47 minutes earlier.

Area forecast discussion, Jul 25, 1:35 PM EDT, 1 hour 47 minutes before

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Hazardous weather outlook, Jul 25, 3:07 PM EDT, 15 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
307 PM EDT Tue Jul 25 2023

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-261915-
Cherokee-Clay-Scott TN-Campbell-Claiborne-Hancock-Hawkins-
Sullivan-Johnson-Morgan-Anderson-Union-Grainger-Hamblen-
Northwest Cocke-Cocke Smoky Mountains-Northwest Greene-
Southeast Greene-Washington TN-Unicoi-Northwest Carter-
Southeast Carter-Roane-Loudon-Knox-Jefferson-Northwest Blount-
Blount Smoky Mountains-North Sevier-Sevier Smoky Mountains-
Sequatchie-Bledsoe-Rhea-Meigs-McMinn-Northwest Monroe-
Southeast Monroe-Marion-Hamilton-Bradley-West Polk-East Polk-Lee-
Wise-Scott VA-Russell-Washington VA-
307 PM EDT Tue Jul 25 2023 /207 PM CDT Tue Jul 25 2023/

This Hazardous Weather Outlook is for portions of southwest North
Carolina...east Tennessee and southwest Virginia.

.DAY ONE...This Afternoon and Tonight

Isolated severe storms through this evening. Damaging winds and
localized flash flooding are possible. The greatest coverage of
thunderstorms will be across the higher terrain.

.DAYS TWO THROUGH SEVEN...Wednesday through Tuesday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this evening.

In the hours before

Special weather statement, Jul 25, 2:40 PM EDT, 42 minutes before

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Special weather statement, Jul 25, 3:00 PM EDT, 22 minutes before

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Special weather statement, Jul 25, 3:10 PM EDT, 12 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
Jul 25, 2:40 PM EDT	Special Weather Statement	MRX	Roane	50 min
Jul 25, 3:10 PM EDT	Special Weather Statement	MRX	Loudon	50 min
Jul 25, 3:21 PM EDT	Areal Flood Advisory	MRX	Morgan, Roane	3 hr
Jul 25, 3:40 PM EDT	Special Weather Statement	MRX	Knox	50 min
Jul 25, 4:03 PM EDT	Special Weather Statement	MRX	Union	42 min
Jul 25, 4:08 PM EDT	Special Weather Statement	MRX	Loudon	52 min
Jul 25, 4:20 PM EDT	Special Weather Statement	MRX	Johnson	40 min
Jul 25, 4:26 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Loudon, Monroe	49 min
Jul 25, 4:29 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Union	22 min
Jul 25, 4:31 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Jefferson, Knox, Union	27 min
Jul 25, 4:34 PM EDT	Special Weather Statement	MRX	Blount	26 min
Jul 25, 4:40 PM EDT	Areal Flood Advisory	MRX	Anderson, Union	3 hr
Jul 25, 4:57 PM EDT	Special Weather Statement	MRX	Jefferson	33 min
Jul 25, 5:02 PM EDT	Special Weather Statement	MRX	Monroe	43 min
Jul 25, 5:11 PM EDT	Special Weather Statement	MRX	Monroe	34 min
Jul 25, 5:22 PM EDT	Special Weather Statement	MRX	McMinn	23 min
Jul 25, 5:39 PM EDT	Severe Thunderstorm Warning	MRX	McMinn, Monroe, Polk	51 min
Jul 25, 6:00 PM EDT	Special Weather Statement	MRX	Polk	45 min
Jul 25, 6:03 PM EDT	Special Weather Statement	MRX	Bradley	42 min
Jul 25, 6:09 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton, Polk	51 min
Jul 25, 6:52 PM EDT	Special Weather Statement	MRX	Polk	23 min
Jul 25, 6:58 PM EDT	Special Weather Statement	MRX	Bradley	47 min
Jul 25, 3:00 PM EDT	Special Weather Statement	MRX	Russell	45 min
Jul 25, 3:17 PM EDT	Areal Flood Advisory	MRX	Russell, Washington	3 hr
Jul 25, 5:27 PM EDT	Special Weather Statement	MRX	Scott	48 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2023 Every severe thunderstorm warning 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.