Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 76, NWS Morristown, TN

June 21, 20217 counties in Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 21, 2021, 6:02 PM EDT for 7 counties in Tennessee. It was in force for 58 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 21, 2021, 6:02 PM EDT (22:02 UTC)
Expired: Jun 21, 2021, 7:00 PM EDT
In force: 58 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hawkins County, TN, Jefferson County, TN

The radar

The Knoxville radar (KMRX), 15 km from the middle of the area, began a volume at 22:02 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.

What was reported inside it

Time	Report	Where	Remark
Jun 21, 6:12 PM EDT	TSTM WND DMG	2 Ne Rutledge, TN	SEVERE TREES DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.0 hours before the alert went out and 293 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: 1530 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 919 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 211 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 9.6

Open this sounding in Storm Lab

The text

As transmitted.

322 
WUUS54 KMRX 212202 RRA
SVRMRX
TNC025-029-057-059-063-073-089-212300-
/O.NEW.KMRX.SV.W.0076.210621T2202Z-210621T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
602 PM EDT Mon Jun 21 2021

The National Weather Service in Morristown has issued a

* Severe Thunderstorm Warning for...
  Southeastern Claiborne County in east Tennessee...
  Southwestern Hawkins County in east Tennessee...
  Jefferson County in east Tennessee...
  Northwestern Cocke County in east Tennessee...
  Northwestern Greene County in east Tennessee...
  Grainger County in east Tennessee...
  Hamblen County in east Tennessee...

* Until 700 PM EDT.

* At 601 PM EDT, severe thunderstorms were located along a line
  extending from 7 miles west of New Tazewell to 6 miles southwest of
  Rutledge to New Market to 9 miles north of Sevierville to 8 miles
  east of Knoxville, moving east at 45 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Morristown, Greeneville, Jefferson City, Newport, Rogersville,
  Dandridge, Rutledge, Bean Station, White Pine and New Market.

This includes the following highways...
 Interstate 40 in Tennessee between mile markers 410 and 435.
 Interstate 81 in Tennessee between mile markers 1 and 34.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3644 8307 3629 8282 3622 8280 3612 8287
      3595 8320 3596 8352 3604 8366 3611 8362
      3626 8371 3635 8367 3636 8370 3634 8373
      3641 8379 3643 8338 3641 8339 3642 8335
      3639 8330 3642 8321 3643 8320 3644 8320
TIME...MOT...LOC 2201Z 260DEG 37KT 3640 8374 3619 8358 3612 8356 3603
8362 3592 8381

HAIL...0.75IN
WIND...60MPH
 
$$

DH

2 follow-up statements

163 
WWUS54 KMRX 212227
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
627 PM EDT Mon Jun 21 2021

TNC025-212237-
/O.CAN.KMRX.SV.W.0076.000000T0000Z-210621T2300Z/
Claiborne TN-
627 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLAIBORNE COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area.  Therefore, the warning has been cancelled.

LAT...LON 3644 8307 3629 8282 3622 8280 3612 8287
      3607 8320 3605 8346 3609 8350 3626 8347
      3630 8349 3638 8350 3637 8345 3640 8346
      3642 8343 3641 8339 3642 8335 3639 8330
      3641 8322 3643 8320 3644 8320
TIME...MOT...LOC 2227Z 259DEG 37KT 3644 8343 3623 8327 3616 8325 3607
8331 3602 8337

$$

TNC029-057-059-063-073-089-212300-
/O.CON.KMRX.SV.W.0076.000000T0000Z-210621T2300Z/
Hawkins TN-Jefferson TN-Cocke TN-Greene TN-Grainger TN-Hamblen TN-
627 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SOUTHWESTERN HAWKINS...NORTHEASTERN JEFFERSON...NORTHWESTERN
COCKE...NORTHWESTERN GREENE...NORTHEASTERN GRAINGER AND HAMBLEN
COUNTIES...

At 627 PM EDT, severe thunderstorms were located along a line
extending from 7 miles east of Tazewell to near Morristown to 7 miles
southwest of Russellville to near White Pine to near Dandridge,
moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Morristown, Greeneville, Jefferson City, Rogersville, Dandridge, Bean
Station, White Pine, Russellville, Mosheim and Bulls Gap.

This includes the following highways...
 Interstate 40 in Tennessee between mile markers 420 and 422.
 Interstate 81 in Tennessee between mile markers 1 and 34.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3644 8307 3629 8282 3622 8280 3612 8287
      3607 8320 3605 8346 3609 8350 3626 8347
      3630 8349 3638 8350 3637 8345 3640 8346
      3642 8343 3641 8339 3642 8335 3639 8330
      3641 8322 3643 8320 3644 8320
TIME...MOT...LOC 2227Z 259DEG 37KT 3644 8343 3623 8327 3616 8325 3607
8331 3602 8337

HAIL...<.75IN
WIND...60MPH
 
$$

DH

149 
WWUS54 KMRX 212241
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
641 PM EDT Mon Jun 21 2021

TNC029-057-089-212251-
/O.CAN.KMRX.SV.W.0076.000000T0000Z-210621T2300Z/
Jefferson TN-Cocke TN-Grainger TN-
641 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JEFFERSON...
NORTHWESTERN COCKE AND NORTHEASTERN GRAINGER COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 3644 8307 3629 8282 3622 8280 3612 8287
      3613 8314 3616 8317 3618 8317 3617 8319
      3613 8318 3615 8322 3613 8322 3612 8326
      3615 8335 3623 8328 3629 8326 3632 8328
      3635 8326 3638 8329 3642 8320 3644 8320
TIME...MOT...LOC 2241Z 260DEG 37KT 3645 8334 3624 8318 3617 8316 3608
8322 3603 8328

$$

TNC059-063-073-212300-
/O.CON.KMRX.SV.W.0076.000000T0000Z-210621T2300Z/
Hawkins TN-Greene TN-Hamblen TN-
641 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SOUTHWESTERN HAWKINS...NORTHWESTERN GREENE AND HAMBLEN
COUNTIES...

At 641 PM EDT, severe thunderstorms were located along a line
extending from 8 miles north of Bean Station to Russellville to 8
miles east of Morristown to near White Pine to Baneberry, moving east
at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Morristown, Greeneville, Rogersville, Bean Station, White Pine,
Russellville, Mosheim, Bulls Gap, McCloud and Romeo.

This includes Interstate 81 in Tennessee between mile markers 7 and
34.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to 
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3644 8307 3629 8282 3622 8280 3612 8287
      3613 8314 3616 8317 3618 8317 3617 8319
      3613 8318 3615 8322 3613 8322 3612 8326
      3615 8335 3623 8328 3629 8326 3632 8328
      3635 8326 3638 8329 3642 8320 3644 8320
TIME...MOT...LOC 2241Z 260DEG 37KT 3645 8334 3624 8318 3617 8316 3608
8322 3603 8328

HAIL...<.75IN
WIND...60MPH
 
$$

DH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 4:21 PM EDT	Special Weather Statement	MRX	Morgan	39 min
Jun 21, 4:29 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Morgan	46 min
Jun 21, 4:40 PM EDT	Special Weather Statement	MRX	Grainger	50 min
Jun 21, 4:48 PM EDT	Special Weather Statement	MRX	Union	42 min
Jun 21, 4:55 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Morgan, Roane, Scott	65 min
Jun 21, 5:01 PM EDT	Special Weather Statement	MRX	Claiborne	44 min
Jun 21, 5:05 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Morgan, Scott	40 min
Jun 21, 5:08 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Hancock, Hawkins	67 min
Jun 21, 5:12 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Claiborne, Union	48 min
Jun 21, 5:29 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Grainger, Knox, Union	46 min
Jun 21, 5:34 PM EDT	Special Weather Statement	MRX	Bradley, Hamilton, Marion, Sequatchie	41 min
Jun 21, 5:36 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Jefferson, Knox	39 min
Jun 21, 5:42 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Claiborne	48 min
Jun 21, 5:46 PM EDT	Special Weather Statement	MRX	Loudon	44 min
Jun 21, 5:53 PM EDT	Severe Thunderstorm Warning	MRX	Hancock	41 min
Jun 21, 5:57 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne, Grainger, Hancock	48 min
Jun 21, 6:02 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Loudon, McMinn, Monroe, Roane	43 min
Jun 21, 6:05 PM EDT	Special Weather Statement	MRX	McMinn	40 min
Jun 21, 6:25 PM EDT	Special Weather Statement	MRX	Bradley, McMinn	65 min
Jun 21, 6:33 PM EDT	Special Weather Statement	MRX	Anderson	57 min
Jun 21, 6:50 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Monroe	40 min
Jun 21, 6:54 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox, Sevier	51 min
Jun 21, 7:19 PM EDT	Severe Thunderstorm Warning	MRX	Morgan, Rhea, Roane	56 min
Jun 21, 7:41 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Loudon, Morgan, Roane	49 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2021 Every severe thunderstorm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.