Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 86, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jun 28, 2021, 6:57 PM EDT for 4 counties in Tennessee. It was in force for 48 min. 3 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
- Jun 28, 2021, 6:57 PM EDT (22:57 UTC)
- Expired
- Jun 28, 2021, 7:45 PM EDT
- In force
- 48 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Anderson County, TN, Campbell County, TN, Knox County, TN, Union County, TN
The radar
The Knoxville radar (KMRX), 53 km from the middle of the area, began a volume at 23:01 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, 7:20 PM EDT | TSTM WND DMG | 2 Wnw Paulette, TN | A FEW TREES DOWN. |
| Jun 28, 7:25 PM EDT | TSTM WND DMG | 2 Nne Clinton, TN | SEVERAL TREES DOWN NEAR THE MUSEUM OF APPALACHIA. |
| Jun 28, 7:30 PM EDT | TSTM WND DMG | 3 Sw Norris, TN | SEVERAL TREES DOWN ACROSS THE 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, 11.0 hours before the alert went out and 235 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 282257 SVRMRX TNC001-013-093-173-282345- /O.NEW.KMRX.SV.W.0086.210628T2257Z-210628T2345Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Morristown TN 657 PM EDT Mon Jun 28 2021 The National Weather Service in Morristown has issued a * Severe Thunderstorm Warning for... North central Knox County in east Tennessee... Central Anderson County in east Tennessee... South central Campbell County in east Tennessee... Southwestern Union County in east Tennessee... * Until 745 PM EDT. * At 657 PM EDT, a severe thunderstorm was located near Plainview, or 7 miles southwest of Maynardville, moving west at 15 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Clinton, Plainview, Halls, Rocky Top, Norris, Norris Dam State Park, Disney, Andersonville, Maloneyville and Paulette. This includes Interstate 75 in Tennessee between mile markers 114 and 133. 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 3619 8380 3606 8384 3609 8430 3630 8420 TIME...MOT...LOC 2257Z 102DEG 7KT 3615 8387 HAIL...0.75IN WIND...60MPH $$ DH
1 follow-up statement
549 WWUS54 KMRX 282317 SVSMRX Severe Weather Statement National Weather Service Morristown TN 717 PM EDT Mon Jun 28 2021 TNC001-013-093-173-282345- /O.CON.KMRX.SV.W.0086.000000T0000Z-210628T2345Z/ Knox TN-Anderson TN-Campbell TN-Union TN- 717 PM EDT Mon Jun 28 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR NORTH CENTRAL KNOX...CENTRAL ANDERSON...SOUTH CENTRAL CAMPBELL AND SOUTHWESTERN UNION COUNTIES... At 716 PM EDT, a severe thunderstorm was located 9 miles northeast of Clinton, moving west at 15 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Clinton, Halls, Rocky Top, Norris, Norris Dam State Park, Disney, Andersonville and Paulette. This includes Interstate 75 in Tennessee between mile markers 114 and 133. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3621 8388 3606 8391 3609 8430 3630 8420 TIME...MOT...LOC 2316Z 100DEG 14KT 3617 8398 HAIL...0.75IN WIND...60MPH $$ DH
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 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, 6:34 PM EDT | Severe Thunderstorm Warning | MRX | Union | 41 min |
| Jun 28, 6:53 PM EDT | Special Weather Statement | MRX | Claiborne | 52 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.