Alert archive / Tennessee / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 41, NWS Morristown, TN

March 25, 2023Blount County, Monroe County, Tennessee; Cherokee County, Clay County, North Carolina

NWS Morristown, TN issued this severe thunderstorm warning at Mar 25, 2023, 3:43 AM EDT for Blount County, Monroe County, Tennessee; Cherokee County, Clay County, North Carolina. It was in force for 62 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: Mar 25, 2023, 3:43 AM EDT (07:43 UTC)
Expired: Mar 25, 2023, 4:45 AM EDT
In force: 62 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cherokee County, NC, Clay County, NC, Blount County, TN, Monroe County, TN

The radar

The Knoxville radar (KMRX), 108 km from the middle of the area, began a volume at 07:47 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
Mar 25, 1:03 AM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 7.7 hours before the alert went out and 223 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1545 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 106 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 Mar 25, 3:21 AM EDT, 22 minutes earlier.

Area forecast discussion, Mar 25, 3:21 AM EDT, 22 minutes before

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Hazardous weather outlook, Mar 25, 3:23 AM EDT, 20 minutes before

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In the hours before

Special weather statement, Mar 25, 1:57 AM EDT, 1 hour 46 minutes before

Special Weather Statement
National Weather Service Morristown TN
157 AM EDT Sat Mar 25 2023

TNZ012-035-250700-
Scott TN-Morgan TN-
157 AM EDT Sat Mar 25 2023

...Strong thunderstorms will impact portions of Morgan and Scott
Counties through 300 AM EDT...

At 156 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Great Meadows Campsites to 14 miles south
of Jamestown to 6 miles southeast of Sparta. Movement was northeast
at 50 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Oneida, Wartburg, Huntsville, Helenwood, Winfield, Sunbright, Rugby,
High Point, Smokey Junction and Honey Creek State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 500 AM EDT for
east Tennessee.

&&

LAT...LON 3659 8426 3651 8426 3651 8433 3646 8435
      3639 8431 3638 8431 3639 8433 3629 8433
      3626 8438 3614 8445 3597 8471 3609 8480
      3609 8483 3616 8491 3620 8491 3629 8487
      3630 8480 3637 8472 3640 8466 3659 8478
TIME...MOT...LOC 0556Z 246DEG 52KT 3659 8476 3622 8494 3589 8537

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

13

Special weather statement, Mar 25, 2:32 AM EDT, 1 hour 11 minutes before

Special Weather Statement
National Weather Service Morristown TN
232 AM EDT Sat Mar 25 2023

TNZ013-250715-
Campbell TN-
232 AM EDT Sat Mar 25 2023

...Strong thunderstorms will impact portions of Campbell County
through 315 AM EDT...

At 231 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Strunk to near Huntsville to 6 miles
northwest of Wartburg. Movement was east at 45 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
La Follette, Jacksboro, Jellico, Caryville, Rocky Top, Elk Valley,
Disney, Cove Lake State Park, Indian Mountain State Park and
Fincastle.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 500 AM EDT for
east Tennessee.

&&

LAT...LON 3659 8399 3643 8390 3639 8392 3639 8396
      3628 8398 3627 8402 3630 8404 3622 8409
      3624 8423 3618 8424 3622 8430 3621 8437
      3626 8438 3628 8433 3639 8433 3638 8431
      3646 8435 3651 8433 3651 8426 3659 8426
TIME...MOT...LOC 0631Z 257DEG 41KT 3659 8436 3638 8443 3616 8467

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

13

Local storm report, Mar 25, 3:18 AM EDT, 25 minutes before

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Special weather statement, Mar 25, 3:28 AM EDT, 15 minutes before

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Local storm report, Mar 25, 3:29 AM EDT, 14 minutes before

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Local storm report, Mar 25, 3:34 AM EDT, 9 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
Mar 25, 1:50 AM EDT	Severe Thunderstorm Warning	MRX	Marion, Sequatchie	55 min
Mar 25, 1:57 AM EDT	Special Weather Statement	MRX	Morgan, Scott	63 min
Mar 25, 2:01 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Marion, Rhea, Sequatchie	44 min
Mar 25, 2:11 AM EDT	Tornado Warning	MRX	Bledsoe, Rhea, Roane	27 min
Mar 25, 2:32 AM EDT	Special Weather Statement	MRX	Campbell	43 min
Mar 25, 2:32 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Marion, Sequatchie	31 min
Mar 25, 2:35 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Loudon, McMinn, Meigs, Monroe and 3 more	55 min
Mar 25, 2:45 AM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Morgan, Roane, Scott	45 min
Mar 25, 2:52 AM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton, McMinn, Meigs, Polk	38 min
Mar 25, 3:03 AM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Loudon, McMinn, Monroe and 1 more	42 min
Mar 25, 3:16 AM EDT	Severe Thunderstorm Warning	MRX	Bradley, McMinn, Monroe, Polk	59 min
Mar 25, 3:28 AM EDT	Special Weather Statement	MRX	Grainger, Union	47 min
Mar 25, 3:41 AM EDT	Severe Thunderstorm Warning	MRX	Blount, Cocke, Grainger, Greene, Hamblen, Jefferson and 5 more	64 min
Mar 25, 3:59 AM EDT	Severe Thunderstorm Warning	MRX	Grainger, Greene, Hamblen, Hancock, Hawkins	46 min
Mar 25, 4:21 AM EDT	Severe Thunderstorm Warning	MRX	Cocke, Greene, Sevier	39 min
Mar 25, 4:40 AM EDT	Severe Thunderstorm Warning	MRX	Carter, Greene, Hawkins, Sullivan, Unicoi, Washington	50 min
Mar 25, 5:15 AM EDT	Severe Thunderstorm Warning	MRX	Carter, Johnson, Sullivan	43 min
Mar 25, 5:49 AM EDT	Wind Advisory	MRX	Anderson, Blount, Campbell, Carter, Claiborne, Cocke and 17 more	14 hr
Mar 25, 4:47 AM EDT	Special Weather Statement	MRX	Russell, Scott, Washington, City of Bristol	58 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2023 Severe Thunderstorm Warnings in North Carolina, 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.