Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 68, NWS Morristown, TN

June 21, 2021Grainger County, Hancock County, Hawkins County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 21, 2021, 5:08 PM EDT for Grainger County, Hancock County, Hawkins County, Tennessee. It was in force for 67 min. 3 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, 5:08 PM EDT (21:08 UTC)
Expired: Jun 21, 2021, 6:15 PM EDT
In force: 67 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Grainger County, TN, Hancock County, TN, Hawkins County, TN

The radar

The Knoxville radar (KMRX), 53 km from the middle of the area, began a volume at 21:08 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, 5:08 PM EDT	HAIL 1.5	3 N Treadway, TN
Jun 21, 5:24 PM EDT	TSTM WND DMG	4 Wnw Treadway, TN	COUPLE TREES DOWN.
Jun 21, 5:51 PM EDT	TSTM WND DMG	Mount Carmel, TN	REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF.

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

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.1 hours before the alert went out and 277 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: 913 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1058 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

708 
WUUS54 KMRX 212108
SVRMRX
TNC057-067-073-212215-
/O.NEW.KMRX.SV.W.0068.210621T2108Z-210621T2215Z/

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

The National Weather Service in Morristown has issued a

* Severe Thunderstorm Warning for...
  Hawkins County in east Tennessee...
  Central Hancock County in east Tennessee...
  Northeastern Grainger County in east Tennessee...

* Until 615 PM EDT.

* At 508 PM EDT, a severe thunderstorm was located near Bean Station,
  or 11 miles south of Sneedville, moving east at 30 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Kingsport, Rogersville, Bean Station, Surgoinsville, Church Hill,
  Mount Carmel, Treadway, Bays Mountain Park, Mooresburg and Okolona.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Large hail and damaging winds and continuous cloud to ground 
lightning is occurring with this storm. 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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3652 8261 3651 8263 3649 8263 3646 8270
      3643 8268 3633 8336 3642 8340 3641 8339
      3643 8337 3645 8337 3660 8296 3659 8265
TIME...MOT...LOC 2108Z 250DEG 28KT 3639 8328 

HAIL...1.00IN
WIND...60MPH
 
$$

DH

2 follow-up statements

051 
WWUS54 KMRX 212127
SVSMRX

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

TNC057-212136-
/O.CAN.KMRX.SV.W.0068.000000T0000Z-210621T2215Z/
Grainger TN-
527 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GRAINGER 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 3652 8261 3651 8263 3649 8263 3646 8270
      3643 8268 3639 8320 3640 8323 3642 8325
      3644 8326 3649 8327 3660 8296 3659 8265
TIME...MOT...LOC 2126Z 250DEG 28KT 3644 8311 

$$

TNC067-073-212215-
/O.CON.KMRX.SV.W.0068.000000T0000Z-210621T2215Z/
Hawkins TN-Hancock TN-
527 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR HAWKINS AND CENTRAL HANCOCK COUNTIES...

At 526 PM EDT, a severe thunderstorm was located near Rogersville,
moving east at 30 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Kingsport, Rogersville, Surgoinsville, Church Hill, Mount Carmel,
Okolona, Treadway, Bays Mountain Park, Klondike and Kyles Ford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3652 8261 3651 8263 3649 8263 3646 8270
      3643 8268 3639 8320 3640 8323 3642 8325
      3644 8326 3649 8327 3660 8296 3659 8265
TIME...MOT...LOC 2126Z 250DEG 28KT 3644 8311 

HAIL...1.00IN
WIND...60MPH
 
$$

DH

756 
WWUS54 KMRX 212146
SVSMRX

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

TNC067-073-212215-
/O.CON.KMRX.SV.W.0068.000000T0000Z-210621T2215Z/
Hawkins TN-Hancock TN-
546 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHEASTERN HAWKINS AND NORTHEASTERN HANCOCK COUNTIES...

At 546 PM EDT, a severe thunderstorm was located near Surgoinsville,
or 7 miles northeast of Rogersville, moving east at 30 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Kingsport, Rogersville, Surgoinsville, Church Hill, Mount Carmel,
Okolona, Kyles Ford and Bays Mountain Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3652 8261 3651 8263 3649 8263 3646 8270
      3643 8268 3640 8301 3647 8306 3656 8308
      3660 8296 3659 8265
TIME...MOT...LOC 2146Z 250DEG 28KT 3649 8293 

HAIL...1.00IN
WIND...60MPH
 
$$

SR

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, 5:12 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.