Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 89, NWS Morristown, TN

June 28, 2021Campbell County, Scott County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 28, 2021, 8:15 PM EDT for Campbell County, Scott County, Tennessee. It was in force for 45 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 28, 2021, 8:15 PM EDT (00:15 UTC)
Expired: Jun 28, 2021, 9:00 PM EDT
In force: 45 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Campbell County, TN, Scott County, TN

The radar

The Knoxville radar (KMRX), 91 km from the middle of the area, began a volume at 00:18 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 28, 8:20 PM EDT	TSTM WND DMG	2 E Elk Valley, 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 00:00Z, 0.3 hours before the alert went out and 210 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: 1323 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1593 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

807 
WUUS54 KMRX 290015
SVRMRX
TNC013-151-290100-
/O.NEW.KMRX.SV.W.0089.210629T0015Z-210629T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
815 PM EDT Mon Jun 28 2021

The National Weather Service in Morristown has issued a

* Severe Thunderstorm Warning for...
  Northwestern Campbell County in east Tennessee...
  Northeastern Scott County in east Tennessee...

* Until 900 PM EDT.

* At 814 PM EDT, a severe thunderstorm was located 8 miles northwest
  of La Follette, moving west at 20 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Oneida, Jellico, Winfield, Elk Valley, Ketchen and Indian Mountain
  State Park.

This includes Interstate 75 in Tennessee between mile markers 147 and
159.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3659 8412 3642 8417 3647 8456 3660 8456
TIME...MOT...LOC 0014Z 097DEG 16KT 3647 8423 

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

DH

1 follow-up statement

834 
WWUS54 KMRX 290033
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
833 PM EDT Mon Jun 28 2021

TNC013-290043-
/O.CAN.KMRX.SV.W.0089.000000T0000Z-210629T0100Z/
Campbell TN-
833 PM EDT Mon Jun 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN 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 3659 8426 3657 8426 3656 8425 3652 8426
      3650 8428 3651 8433 3647 8434 3646 8435
      3644 8435 3647 8456 3660 8456
TIME...MOT...LOC 0033Z 097DEG 16KT 3653 8431 

$$

TNC151-290100-
/O.CON.KMRX.SV.W.0089.000000T0000Z-210629T0100Z/
Scott TN-
833 PM EDT Mon Jun 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHEASTERN SCOTT COUNTY...

At 833 PM EDT, a severe thunderstorm was located near Zion Hill, or
11 miles east of Oneida, moving west at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Oneida, Winfield and Ketchen. 

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 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 3659 8426 3657 8426 3656 8425 3652 8426
      3650 8428 3651 8433 3647 8434 3646 8435
      3644 8435 3647 8456 3660 8456
TIME...MOT...LOC 0033Z 097DEG 16KT 3653 8431 

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 28, 8:16 PM EDT	Special Weather Statement	MRX	Morgan	44 min
Jun 28, 8:42 PM EDT	Special Weather Statement	MRX	Scott	63 min
Jun 28, 9:09 PM EDT	Special Weather Statement	MRX	Morgan	51 min
Jun 28, 9:34 PM EDT	Areal Flood Advisory	MRX	Morgan	116 min
Jun 29, 4:02 PM EDT	Special Weather Statement	MRX	McMinn	43 min
Jun 29, 4:20 PM EDT	Severe Thunderstorm Warning	MRX	McMinn	40 min
Jun 29, 4:47 PM EDT	Special Weather Statement	MRX	Loudon	28 min
Jun 29, 4:59 PM EDT	Special Weather Statement	MRX	Roane	46 min
Jun 29, 5:22 PM EDT	Special Weather Statement	MRX	Roane	23 min
Jun 29, 5:46 PM EDT	Special Weather Statement	MRX	Anderson	44 min
Jun 29, 5:57 PM EDT	Special Weather Statement	MRX	Rhea	18 min
Jun 29, 6:20 PM EDT	Special Weather Statement	MRX	Campbell	40 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.