Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 65, NWS Morristown, TN

June 21, 2021Campbell County, Morgan County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 21, 2021, 4:29 PM EDT for Campbell County, Morgan County, Tennessee. It was in force for 46 min. 2 reports 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, 4:29 PM EDT (20:29 UTC)
Expired: Jun 21, 2021, 5:15 PM EDT
In force: 46 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Campbell County, TN, Morgan County, TN

The radar

The Knoxville radar (KMRX), 96 km from the middle of the area, began a volume at 20:30 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, 4:45 PM EDT	TSTM WND DMG	5 Wnw Wartburg, TN	A FEW TREES DOWN.
Jun 21, 5:09 PM EDT	TSTM WND DMG	2 Nnw Wartburg, TN	A FEW 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, 8.5 hours before the alert went out and 191 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.

901 
WUUS54 KMRX 212029
SVRMRX
TNC013-129-212115-
/O.NEW.KMRX.SV.W.0065.210621T2029Z-210621T2115Z/

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

The National Weather Service in Morristown has issued a

* Severe Thunderstorm Warning for...
  Morgan County in east Tennessee...
  Southwestern Campbell County in east Tennessee...

* Until 515 PM EDT.

* At 428 PM EDT, a severe thunderstorm was located 8 miles east of
  Fairfield Glade, or 9 miles southwest of Wartburg, moving northeast
  at 35 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Wartburg, Sunbright, Oakdale, Coalfield, Pine Orchard, Frozen Head
  State Park and Petros.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3628 8462 3626 8457 3623 8457 3621 8448
      3617 8444 3622 8437 3626 8438 3629 8433
      3620 8423 3618 8423 3618 8425 3622 8430
      3621 8438 3614 8445 3609 8438 3605 8435
      3593 8469 3599 8472 3609 8480 3609 8484
TIME...MOT...LOC 2028Z 240DEG 30KT 3604 8473 

HAIL...0.88IN
WIND...60MPH
 
$$

Garuckas

2 follow-up statements

433 
WWUS54 KMRX 212034
SVSMRX

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

TNC013-212043-
/O.CAN.KMRX.SV.W.0065.000000T0000Z-210621T2115Z/
Campbell TN-
434 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CAMPBELL COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3628 8462 3626 8457 3623 8457 3621 8448
      3616 8444 3615 8445 3614 8445 3611 8442
      3609 8438 3605 8435 3593 8469 3600 8472
      3609 8480 3609 8484
TIME...MOT...LOC 2033Z 240DEG 30KT 3606 8468 

$$

TNC129-212115-
/O.CON.KMRX.SV.W.0065.000000T0000Z-210621T2115Z/
Morgan TN-
434 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR MORGAN COUNTY...

At 433 PM EDT, a severe thunderstorm was located near Wartburg,
moving northeast at 35 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Wartburg, Sunbright, Oakdale, Coalfield, Pine Orchard, Frozen Head
State Park and Petros.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3628 8462 3626 8457 3623 8457 3621 8448
      3616 8444 3615 8445 3614 8445 3611 8442
      3609 8438 3605 8435 3593 8469 3600 8472
      3609 8480 3609 8484
TIME...MOT...LOC 2033Z 240DEG 30KT 3606 8468 

HAIL...0.88IN
WIND...60MPH
 
$$

Garuckas

059 
WWUS54 KMRX 212058
SVSMRX

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

TNC129-212115-
/O.CON.KMRX.SV.W.0065.000000T0000Z-210621T2115Z/
Morgan TN-
458 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SOUTHEASTERN MORGAN COUNTY...

At 458 PM EDT, a severe thunderstorm was located 8 miles northeast of
Wartburg, moving northeast at 35 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Wartburg, Oakdale, Coalfield, Frozen Head State Park and Petros. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3619 8457 3621 8456 3623 8457 3621 8448
      3616 8444 3615 8445 3614 8445 3611 8442
      3609 8438 3605 8435 3598 8456 3601 8458
      3611 8462 3616 8463
TIME...MOT...LOC 2058Z 240DEG 30KT 3617 8445 

HAIL...0.88IN
WIND...60MPH
 
$$

Garuckas

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, 4:40 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, 6:02 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne, Cocke, Grainger, Greene, Hamblen, Hawkins and 1 more	58 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.