Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 72, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jun 21, 2021, 5:42 PM EDT for Campbell County, Claiborne County, Tennessee. It was in force for 48 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 21, 2021, 5:42 PM EDT (21:42 UTC)
- Expired
- Jun 21, 2021, 6:30 PM EDT
- In force
- 48 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Campbell County, TN, Claiborne County, TN
The radar
The Knoxville radar (KMRX), 66 km from the middle of the area, began a volume at 21:44 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, 6:18 PM EDT | TSTM WND DMG | 3 Ese Clairfield, TN | SEVERAL TREES DOWN NEAR THE CLAIRFIELD AREA. |
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, 9.7 hours before the alert went out and 239 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
- 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
The text
As transmitted.
714
WUUS54 KMRX 212142
SVRMRX
TNC013-025-212230-
/O.NEW.KMRX.SV.W.0072.210621T2142Z-210621T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
542 PM EDT Mon Jun 21 2021
The National Weather Service in Morristown has issued a
* Severe Thunderstorm Warning for...
Northwestern Claiborne County in east Tennessee...
Northern Campbell County in east Tennessee...
* Until 630 PM EDT.
* At 541 PM EDT, a severe thunderstorm was located 8 miles south of
Zion Hill, or 9 miles northwest of La Follette, moving east at 45
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...
Harrogate, Jellico, Elk Valley, Cumberland Gap, Arthur, Indian
Mountain State Park, Clairfield and White Oak.
This includes Interstate 75 in Tennessee between mile markers 142 and
161.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
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 3651 8362 3638 8427 3651 8433 3651 8426
3653 8425 3657 8426 3659 8420 3658 8369
3660 8367 3660 8366
TIME...MOT...LOC 2141Z 251DEG 40KT 3649 8419
HAIL...1.00IN
WIND...60MPH
$$
DH1 follow-up statement
574
WWUS54 KMRX 212205
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
605 PM EDT Mon Jun 21 2021
TNC013-212214-
/O.CAN.KMRX.SV.W.0072.000000T0000Z-210621T2230Z/
Campbell TN-
605 PM EDT Mon Jun 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CAMPBELL COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3651 8362 3645 8393 3646 8393 3647 8394
3654 8398 3659 8398 3658 8369 3660 8367
3660 8366
TIME...MOT...LOC 2204Z 251DEG 40KT 3658 8388
$$
TNC025-212230-
/O.CON.KMRX.SV.W.0072.000000T0000Z-210621T2230Z/
Claiborne TN-
605 PM EDT Mon Jun 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTHWESTERN CLAIBORNE COUNTY...
At 604 PM EDT, a severe thunderstorm was located over Pruden, or 9
miles west of Middlesboro, moving east at 45 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Harrogate, Cumberland Gap, Arthur and Clairfield.
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 3651 8362 3645 8393 3646 8393 3647 8394
3654 8398 3659 8398 3658 8369 3660 8367
3660 8366
TIME...MOT...LOC 2204Z 251DEG 40KT 3658 8388
HAIL...0.75IN
WIND...60MPH
$$
DHThe 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, 5:08 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, 5:46 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, 2021Every 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.