Alert archive / Tennessee / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 59, NWS Morristown, TN

May 7, 2023Anderson County, Campbell County, Knox County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at May 7, 2023, 4:27 PM EDT for Anderson County, Campbell County, Knox County, Tennessee. It was in force for 48 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
May 7, 2023, 4:27 PM EDT (20:27 UTC)
Expired
May 7, 2023, 5:15 PM EDT
In force
48 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Anderson County, TN, Campbell County, TN, Knox County, TN

The radar

The Knoxville radar (KMRX), 62 km from the middle of the area, began a volume at 20:29 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, 8.5 hours before the alert went out and 225 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2023-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 117 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2023-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 189 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
117 J/kg
Mixed-layer CIN
-332 J/kg
Mixed-layer LCL
802 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
189 m²/s²
0-3 km storm-relative helicity
303 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 May 7, 3:15 PM EDT, 1 hour 12 minutes earlier.

Area forecast discussion, May 7, 3:15 PM EDT, 1 hour 12 minutes before
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Hazardous weather outlook, May 7, 2:54 PM EDT, 1 hour 33 minutes before
Hazardous Weather Outlook
National Weather Service Morristown TN
254 PM EDT Sun May 7 2023

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-081900-
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-
254 PM EDT Sun May 7 2023 /154 PM CDT Sun May 7 2023/

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

.DAY ONE...This Afternoon and Tonight

...Isolated Strong Storms this Afternoon...

A line of storms will move southeast from Kentucky into
southwest Virginia and east Tennessee through early this evening.
Some of these storms could be strong to possibly severe, with the
potential to produce damaging wind gusts and possibly small hail.

Locally heavy rains may produce some ponding of low-lying areas
and street flooding.

.DAYS TWO THROUGH SEVEN...Monday through Sunday

Additional storms are expected at times Monday and Tuesday,
although the timing is uncertain. If storms track over the same
areas, there could be a threat of flash flooding. A few storms may
have the potential to produce hail and damaging wind gusts.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this Afternoon, Monday, and
Tuesday.

In the hours before

Special weather statement, May 7, 2:42 PM EDT, 1 hour 45 minutes before
Special Weather Statement
National Weather Service Morristown TN
242 PM EDT Sun May 7 2023

TNZ015-VAZ001-071915-
Hancock TN-Lee VA-
242 PM EDT Sun May 7 2023

...A strong thunderstorm will impact portions of northwestern Hancock
and south central Lee Counties through 315 PM EDT...

At 241 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles southwest of Hensley Store, or 12 miles northwest of
Sneedville, moving east at 25 mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Sneedville, Ewing and Evanston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3666 8316 3646 8324 3655 8341 3658 8345
      3660 8349 3667 8346 3667 8342 3669 8338
TIME...MOT...LOC 1841Z 291DEG 21KT 3662 8340

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

CED
Special weather statement, May 7, 3:15 PM EDT, 1 hour 12 minutes before
Special Weather Statement
National Weather Service Morristown TN
315 PM EDT Sun May 7 2023

TNZ015-016-072000-
Hancock TN-Hawkins TN-
315 PM EDT Sun May 7 2023

...A strong thunderstorm will impact portions of central Hawkins and
central Hancock Counties through 400 PM EDT...

At 315 PM EDT, Doppler radar was tracking a strong thunderstorm near
Sneedville, moving southeast at 25 mph.

HAZARD...Winds in excess of 30 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Rogersville, Sneedville, Surgoinsville, Kepler, McCloud and Klondike.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3649 8278 3636 8285 3635 8288 3635 8289
      3633 8291 3633 8294 3632 8295 3648 8323
      3657 8317
TIME...MOT...LOC 1915Z 293DEG 24KT 3649 8314

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...30 MPH

CED
Special weather statement, May 7, 3:34 PM EDT, 53 minutes before
Special Weather Statement
National Weather Service Morristown TN
334 PM EDT Sun May 7 2023

TNZ014-016-038-039-072015-
Claiborne TN-Hamblen TN-Grainger TN-Hawkins TN-
334 PM EDT Sun May 7 2023

...A strong thunderstorm will impact portions of southeastern
Claiborne, west central Hawkins, northeastern Grainger and central
Hamblen Counties through 415 PM EDT...

At 334 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Tazewell, or 8 miles north of Rutledge, moving
southeast at 25 mph.

HAZARD...Winds in excess of 30 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Morristown, Bean Station, Thorn Hill and Mooresburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3642 8338 3641 8339 3642 8336 3641 8332
      3640 8331 3639 8331 3640 8328 3636 8315
      3618 8326 3637 8356 3645 8348
TIME...MOT...LOC 1934Z 293DEG 21KT 3639 8347

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...30 MPH

CED
Special weather statement, May 7, 3:47 PM EDT, 40 minutes before
Special Weather Statement
National Weather Service Morristown TN
347 PM EDT Sun May 7 2023

TNZ012-035-072030-
Scott TN-Morgan TN-
347 PM EDT Sun May 7 2023

...A strong thunderstorm will impact portions of Morgan and southern
Scott Counties through 430 PM EDT...

At 347 PM EDT, Doppler radar was tracking a strong thunderstorm 12
miles southeast of Jamestown, moving southeast at 30 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Wartburg, Sunbright, Oakdale, Rugby, Rugby State Park, Smokey
Junction, Deerlodge, Elgin, Robbins and Frozen Head State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3624 8488 3629 8487 3630 8480 3633 8477
      3634 8474 3635 8474 3635 8473 3637 8472
      3637 8470 3640 8466 3631 8433 3628 8433
      3626 8438 3621 8437 3618 8440 3615 8445
      3613 8443 3597 8456 3621 8491
TIME...MOT...LOC 1947Z 298DEG 28KT 3630 8477

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

CED
Special weather statement, May 7, 4:11 PM EDT, 16 minutes before
Special Weather Statement
National Weather Service Morristown TN
411 PM EDT Sun May 7 2023

TNZ016-039-040-042-072045-
Hamblen TN-Northwest Greene TN-Northwest Cocke TN-Hawkins TN-
411 PM EDT Sun May 7 2023

...A strong thunderstorm will impact portions of southwestern
Hawkins, west central Greene and eastern Hamblen Counties through 445
PM EDT...

At 410 PM EDT, Doppler radar was tracking a strong thunderstorm over
Russellville, or 7 miles northeast of Morristown, moving southeast at
25 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Morristown, Russellville, Mosheim, Bulls Gap, St. Clair, Mohawk and
Mooresburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3627 8290 3606 8306 3623 8332 3627 8329
      3626 8328 3628 8328 3628 8327 3629 8326
      3630 8326 3638 8320
TIME...MOT...LOC 2010Z 301DEG 23KT 3628 8320

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

KRS
Special weather statement, May 7, 4:14 PM EDT, 13 minutes before
Special Weather Statement
National Weather Service Morristown TN
414 PM EDT Sun May 7 2023

TNZ013-036-072100-
Anderson TN-Campbell TN-
414 PM EDT Sun May 7 2023

...A strong thunderstorm will impact portions of central Anderson and
southwestern Campbell Counties through 500 PM EDT...

At 414 PM EDT, Doppler radar was tracking a strong thunderstorm 8
miles southwest of Jacksboro, or 12 miles northwest of Clinton,
moving southeast at 25 mph.

HAZARD...Winds in excess of 40 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Clinton, Caryville, Rocky Top, Norris, Norris Dam State Park, Disney,
Andersonville, Rosedale and Cove Lake State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3634 8429 3618 8395 3608 8407 3608 8409
      3607 8409 3604 8406 3601 8409 3601 8411
      3619 8440 3621 8439 3621 8437 3623 8437
TIME...MOT...LOC 2014Z 300DEG 22KT 3623 8427

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

KRS

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 2:42 PM EDTSpecial Weather StatementMRXHancock33 min
May 7, 3:15 PM EDTSpecial Weather StatementMRXHawkins45 min
May 7, 3:34 PM EDTSpecial Weather StatementMRXHamblen41 min
May 7, 3:47 PM EDTSpecial Weather StatementMRXMorgan43 min
May 7, 4:11 PM EDTSpecial Weather StatementMRXHamblen34 min
May 7, 4:14 PM EDTSpecial Weather StatementMRXAnderson46 min
May 7, 4:24 PM EDTSevere Thunderstorm WarningMRXCocke, Greene, Hamblen51 min
May 7, 4:45 PM EDTSpecial Weather StatementMRXJefferson30 min
May 7, 5:02 PM EDTSpecial Weather StatementMRXKnox28 min
May 7, 5:04 PM EDTSevere Thunderstorm WarningMRXCocke, Jefferson41 min
May 7, 5:05 PM EDTSpecial Weather StatementMRXGreene40 min
May 7, 5:51 PM EDTSpecial Weather StatementMRXLoudon, Monroe39 min
May 7, 6:03 PM EDTSpecial Weather StatementMRXCocke42 min
May 7, 6:07 PM EDTSpecial Weather StatementMRXMcMinn, Meigs, Rhea38 min
May 7, 6:25 PM EDTSpecial Weather StatementMRXSequatchie50 min
May 7, 6:33 PM EDTSpecial Weather StatementMRXMonroe42 min
May 7, 1:14 PM EDTSpecial Weather StatementMRXWise, City of Norton31 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2023Every 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.