Alert archive / Tennessee / Tornado Warnings in 2021
Tornado Warning 7, NWS Morristown, TN
NWS Morristown, TN issued this tornado warning at Apr 8, 2021, 6:52 PM EDT for Campbell County, Claiborne County, Scott County, Tennessee. It was in force for 38 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
- Apr 8, 2021, 6:52 PM EDT (22:52 UTC)
- Expired
- Apr 8, 2021, 7:30 PM EDT
- In force
- 38 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.5 in
Counties Campbell County, TN, Claiborne County, TN, Scott County, TN
The radar
The Knoxville radar (KMRX), 55 km from the middle of the area, began a volume at 22:52 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, 7:15 PM EDT | HAIL 1.75 | 1 Sw Duff, TN | |
| Apr 8, 7:35 PM EDT | HAIL 1.5 | Clairfield, TN |
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, 10.9 hours before the alert went out and 243 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.
- 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
The text
As transmitted.
548
WFUS54 KMRX 082252
TORMRX
TNC013-025-151-082330-
/O.NEW.KMRX.TO.W.0007.210408T2252Z-210408T2330Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Morristown TN
652 PM EDT Thu Apr 8 2021
The National Weather Service in Morristown has issued a
* Tornado Warning for...
Northwestern Claiborne County in east Tennessee...
Northern Campbell County in east Tennessee...
East central Scott County in east Tennessee...
* Until 730 PM EDT.
* At 651 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Jacksboro, or near La Follette, moving northeast
at 35 mph.
HAZARD...Tornado and ping pong ball 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 dangerous storm will be near...
La Follette around 705 PM EDT.
Other locations impacted by this tornadic thunderstorm include Elk
Valley, Clairfield, Fincastle, Royal Blue, White Oak, Jellico and
Caryville.
This includes Interstate 75 in Tennessee between mile markers 139 and
158.
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 3658 8372 3645 8365 3642 8380 3643 8380
3643 8381 3642 8383 3643 8386 3642 8388
3643 8389 3640 8391 3640 8395 3639 8398
3632 8437 3645 8440 3659 8405
TIME...MOT...LOC 2251Z 246DEG 29KT 3640 8425
TORNADO...RADAR INDICATED
HAIL...1.50IN
$$
DH1 follow-up statement
621
WWUS54 KMRX 082305
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
705 PM EDT Thu Apr 8 2021
TNC151-082315-
/O.CAN.KMRX.TO.W.0007.000000T0000Z-210408T2330Z/
Scott TN-
705 PM EDT Thu Apr 8 2021
...THE TORNADO WARNING FOR EAST CENTRAL SCOTT COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
LAT...LON 3650 8368 3646 8384 3646 8385 3645 8387
3645 8389 3643 8395 3642 8399 3639 8428
3649 8431 3659 8405 3658 8372
TIME...MOT...LOC 2305Z 238DEG 27KT 3645 8422
$$
TNC013-025-082330-
/O.CON.KMRX.TO.W.0007.000000T0000Z-210408T2330Z/
Claiborne TN-Campbell TN-
705 PM EDT Thu Apr 8 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR
NORTHWESTERN CLAIBORNE AND NORTHERN CAMPBELL COUNTIES...
At 705 PM EDT, a severe thunderstorm capable of producing a tornado
was located 7 miles northwest of La Follette, moving northeast at 30
mph.
HAZARD...Tornado and ping pong ball 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 Claiborne and northern Campbell Counties, including the
following locations... White Oak, Elk Valley, Clairfield, Jellico and
Fincastle.
This includes Interstate 75 in Tennessee between mile markers 143 and
158.
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 3650 8368 3646 8384 3646 8385 3645 8387
3645 8389 3643 8395 3642 8399 3639 8428
3649 8431 3659 8405 3658 8372
TIME...MOT...LOC 2305Z 238DEG 27KT 3645 8422
TORNADO...RADAR INDICATED
HAIL...1.50IN
$$
DHThe 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, 6:44 PM EDT | Tornado Warning | MRX | Campbell, Scott | 46 min |
| Apr 8, 6:50 PM EDT | Severe Thunderstorm Warning | MRX | Campbell, Claiborne | 40 min |
| Apr 8, 7:24 PM EDT | Severe Thunderstorm Warning | MRX | Campbell, Claiborne | 36 min |
Nearby
Tornado Warnings in Tennessee, 2021Every tornado warning in 2021Tornadoes 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.