Alert archive / Tennessee / Tornado Warnings in 2021

Tornado Warning 6, NWS Morristown, TN

April 8, 2021Campbell County, Scott County, Tennessee

NWS Morristown, TN issued this tornado warning at Apr 8, 2021, 6:44 PM EDT for Campbell County, Scott County, Tennessee. It was in force for 46 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: Apr 8, 2021, 6:44 PM EDT (22:44 UTC)
Expired: Apr 8, 2021, 7:30 PM EDT
In force: 46 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

Counties Campbell County, TN, Scott County, TN

The radar

The Knoxville radar (KMRX), 93 km from the middle of the area, began a volume at 22:45 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
Apr 8, 6:53 PM EDT	TSTM WND DMG	2 Nne Oneida, TN	REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN; POWER POLES BROKEN.

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, 10.7 hours before the alert went out and 208 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: 55 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 626 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 354 m²/s²
0-3 km storm-relative helicity: 375 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

956 
WFUS54 KMRX 082244
TORMRX
TNC013-151-082330-
/O.NEW.KMRX.TO.W.0006.210408T2244Z-210408T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Morristown TN
644 PM EDT Thu Apr 8 2021

The National Weather Service in Morristown has issued a

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

* Until 730 PM EDT.
    
* At 644 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Oneida, moving northeast at 35 mph.

  HAZARD...Tornado and half dollar size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  northwestern Campbell and northeastern Scott Counties, including
  the following locations... Jellico, Elk Valley, Ketchen, Indian
  Mountain State Park and Winfield.

This includes Interstate 75 in Tennessee between mile markers 152 and
160.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3659 8411 3651 8406 3641 8461 3651 8465
      3660 8449
TIME...MOT...LOC 2244Z 243DEG 30KT 3648 8452 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

DH

2 follow-up statements

489 
WWUS54 KMRX 082255
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
655 PM EDT Thu Apr 8 2021

TNC013-151-082330-
/O.CON.KMRX.TO.W.0006.000000T0000Z-210408T2330Z/
Campbell TN-Scott TN-
655 PM EDT Thu Apr 8 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR
NORTHWESTERN CAMPBELL AND NORTHEASTERN SCOTT COUNTIES...
    
At 655 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Oneida, moving northeast at 30 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

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

This includes Interstate 75 in Tennessee between mile markers 153 and
160.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3659 8411 3651 8406 3648 8450 3654 8454
      3660 8449
TIME...MOT...LOC 2255Z 232DEG 26KT 3653 8445 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

DGS

433 
WWUS54 KMRX 082314
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
714 PM EDT Thu Apr 8 2021

TNC013-151-082330-
/O.CON.KMRX.TO.W.0006.000000T0000Z-210408T2330Z/
Campbell TN-Scott TN-
714 PM EDT Thu Apr 8 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR NORTH
CENTRAL CAMPBELL AND NORTHEASTERN SCOTT COUNTIES...
    
At 714 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Zion Hill, or 11 miles southwest of Williamsburg,
moving northeast at 35 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Jellico, Ketchen and Indian Mountain State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3659 8411 3656 8413 3652 8433 3657 8437
      3660 8436
TIME...MOT...LOC 2314Z 243DEG 30KT 3660 8427 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

DH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 3:58 AM EDT	Wind Advisory	MRX	Blount, Carter, Cocke, Greene, Johnson, Monroe and 2 more	19 hr
Apr 8, 4:47 PM EDT	Tornado Warning	MRX	Morgan, Scott	43 min
Apr 8, 5:21 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Morgan, Scott	39 min
Apr 8, 5:25 PM EDT	Tornado Warning	MRX	Campbell, Morgan, Scott	35 min
Apr 8, 5:51 PM EDT	Tornado Warning	MRX	Campbell, Scott	39 min
Apr 8, 5:56 PM EDT	Tornado Warning	MRX	Scott	34 min
Apr 8, 6:16 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Scott	44 min
Apr 8, 6:22 PM EDT	Tornado Warning	MRX	Campbell, Claiborne, Scott	53 min
Apr 8, 6:50 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Claiborne	40 min
Apr 8, 6:52 PM EDT	Tornado Warning	MRX	Campbell, Claiborne, Scott	38 min
Apr 8, 7:24 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Claiborne	36 min

Nearby

Tornado Warnings in Tennessee, 2021 Every tornado warning in 2021 Tornadoes 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.