Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 84, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jun 28, 2021, 6:34 PM EDT for Union County, Tennessee. It was in force for 41 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, 6:34 PM EDT (22:34 UTC)
- Expired
- Jun 28, 2021, 7:15 PM EDT
- In force
- 41 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Union County, TN
The radar
The Knoxville radar (KMRX), 43 km from the middle of the area, began a volume at 22:37 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, 6:58 PM EDT | TSTM WND DMG | 2 Nnw Maynardville, TN | A COUPLE TREES DOWN ACROSS THE COUNTY. |
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, 10.6 hours before the alert went out and 247 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
- 78 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 1282 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -38 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
524
WUUS54 KMRX 282234
SVRMRX
TNC173-282315-
/O.NEW.KMRX.SV.W.0084.210628T2234Z-210628T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
634 PM EDT Mon Jun 28 2021
The National Weather Service in Morristown has issued a
* Severe Thunderstorm Warning for...
Union County in east Tennessee...
* Until 715 PM EDT.
* At 634 PM EDT, a severe thunderstorm was located near Maynardville,
moving northwest at 10 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Maynardville, Plainview, Luttrell, Rose Hill, Norris Lake, Big
Ridge State Park and Sharps Chapel.
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 3632 8368 3617 8375 3623 8399 3625 8400
3626 8400 3639 8391
TIME...MOT...LOC 2234Z 112DEG 7KT 3629 8374
HAIL...0.75IN
WIND...60MPH
$$
DH1 follow-up statement
998
WWUS54 KMRX 282300
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
700 PM EDT Mon Jun 28 2021
TNC173-282315-
/O.CON.KMRX.SV.W.0084.000000T0000Z-210628T2315Z/
Union TN-
700 PM EDT Mon Jun 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR CENTRAL UNION COUNTY...
At 700 PM EDT, a severe thunderstorm was located near Maynardville,
moving west at 10 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Maynardville, Rose Hill, Norris Lake, Big Ridge State Park and Sharps
Chapel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3632 8374 3625 8380 3619 8382 3623 8399
3625 8400 3626 8400 3639 8391
TIME...MOT...LOC 2300Z 112DEG 7KT 3631 8380
HAIL...0.75IN
WIND...60MPH
$$
DHThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 3:33 PM EDT | Special Weather Statement | MRX | Cocke | 42 min |
| Jun 28, 4:11 PM EDT | Special Weather Statement | MRX | Monroe | 49 min |
| Jun 28, 4:21 PM EDT | Severe Thunderstorm Warning | MRX | McMinn, Monroe | 39 min |
| Jun 28, 4:57 PM EDT | Special Weather Statement | MRX | Monroe | 63 min |
| Jun 28, 5:19 PM EDT | Special Weather Statement | MRX | Roane | 41 min |
| Jun 28, 6:06 PM EDT | Special Weather Statement | MRX | Knox | 39 min |
| Jun 28, 6:11 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Grainger, Union | 49 min |
| Jun 28, 6:53 PM EDT | Special Weather Statement | MRX | Claiborne | 52 min |
| Jun 28, 6:57 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Knox, Union | 48 min |
| Jun 28, 7:14 PM EDT | Special Weather Statement | MRX | Campbell | 46 min |
| Jun 28, 7:44 PM EDT | Special Weather Statement | MRX | Anderson, Campbell | 61 min |
| Jun 28, 7:53 PM EDT | Severe Thunderstorm Warning | MRX | Campbell, Scott | 52 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.