Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 142, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Dec 6, 2021, 10:02 AM EST for 6 counties in Tennessee. It was in force for 28 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
- Dec 6, 2021, 10:02 AM EST (15:02 UTC)
- Expired
- Dec 6, 2021, 10:30 AM EST
- In force
- 28 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Rhea County, TN, Roane County, TN
The radar
The Knoxville radar (KMRX), 132 km from the middle of the area, began a volume at 15:06 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 |
|---|---|---|---|
| Dec 6, 10:10 AM EST | TSTM WND DMG | 4 Sse Spring City, TN | A FEW TREES DOWN. |
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, 3.0 hours before the alert went out and 179 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
- 250 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 665 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 509 m²/s²
- 0-3 km storm-relative helicity
- 600 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 3.8
The text
As transmitted.
629
WUUS54 KMRX 061502
SVRMRX
TNC105-107-121-123-143-145-061600-
/O.NEW.KMRX.SV.W.0142.211206T1502Z-211206T1600Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
1002 AM EST Mon Dec 6 2021
The National Weather Service in Morristown has issued a
* Severe Thunderstorm Warning for...
Rhea County in east Tennessee...
Loudon County in east Tennessee...
Meigs County in east Tennessee...
Northern McMinn County in east Tennessee...
Northwestern Monroe County in east Tennessee...
Roane County in east Tennessee...
* Until 1100 AM EST.
* At 1001 AM EST, severe thunderstorms were located along a line
extending from near Spring City to 9 miles northwest of Decatur to
near Dayton to 12 miles north of Soddy-Daisy to 7 miles east of
Dunlap, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Oak Ridge, Athens, Lenoir City, Dayton, Kingston, Sweetwater,
Rockwood, Loudon, Madisonville and Decatur.
This includes the following highways...
Interstate 40 in Tennessee between mile markers 341 and 368.
Interstate 75 in Tennessee between mile markers 45 and 84.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3542 8503 3543 8510 3546 8514 3548 8512
3550 8514 3553 8510 3557 8511 3568 8498
3578 8490 3583 8477 3589 8471 3602 8433
3590 8427 3581 8417 3577 8418 3576 8415
3571 8417 3566 8413 3544 8438 3539 8503
TIME...MOT...LOC 1501Z 249DEG 51KT 3577 8486 3561 8494 3554 8506 3543
8516 3540 8526
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DH2 follow-up statements
651
WWUS54 KMRX 061519
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
1019 AM EST Mon Dec 6 2021
TNC107-123-061529-
/O.CAN.KMRX.SV.W.0142.000000T0000Z-211206T1600Z/
McMinn TN-Monroe TN-
1019 AM EST Mon Dec 6 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MCMINN AND
NORTHWESTERN MONROE COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened. Therefore, the
warning has been cancelled.
LAT...LON 3567 8487 3583 8477 3589 8471 3602 8433
3590 8427 3581 8417 3577 8418 3576 8415
3571 8417 3569 8425 3566 8440 3567 8443
3565 8449 3567 8450 3565 8452 3564 8451
3563 8457 3564 8462 3562 8465 3559 8483
TIME...MOT...LOC 1519Z 249DEG 51KT 3586 8458 3570 8466 3563 8478 3552
8488 3549 8498
$$
TNC105-121-143-145-061600-
/O.CON.KMRX.SV.W.0142.000000T0000Z-211206T1600Z/
Rhea TN-Loudon TN-Meigs TN-Roane TN-
1019 AM EST Mon Dec 6 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 AM EST
FOR NORTHEASTERN RHEA...LOUDON...NORTHEASTERN MEIGS AND ROANE
COUNTIES...
At 1019 AM EST, severe thunderstorms were located along a line
extending from Midtown to 8 miles southwest of Fairview to 6 miles
southeast of Spring City to near Decatur to Dayton, moving east at 60
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Oak Ridge, Lenoir City, Kingston, Rockwood, Loudon, Fairview, Spring
City, Midtown, Harriman and Friendsville.
This includes the following highways...
Interstate 40 in Tennessee between mile markers 341 and 368.
Interstate 75 in Tennessee between mile markers 67 and 84.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3567 8487 3583 8477 3589 8471 3602 8433
3590 8427 3581 8417 3577 8418 3576 8415
3571 8417 3569 8425 3566 8440 3567 8443
3565 8449 3567 8450 3565 8452 3564 8451
3563 8457 3564 8462 3562 8465 3559 8483
TIME...MOT...LOC 1519Z 249DEG 51KT 3586 8458 3570 8466 3563 8478 3552
8488 3549 8498
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DH764
WWUS54 KMRX 061530
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
1030 AM EST Mon Dec 6 2021
TNC105-121-143-145-061540-
/O.CAN.KMRX.SV.W.0142.000000T0000Z-211206T1600Z/
Rhea TN-Loudon TN-Meigs TN-Roane TN-
1030 AM EST Mon Dec 6 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN RHEA...LOUDON...
NORTHEASTERN MEIGS AND ROANE COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.
LAT...LON 3567 8487 3583 8477 3589 8471 3602 8433
3590 8427 3581 8417 3577 8418 3576 8415
3571 8417 3569 8425 3566 8440 3567 8443
3565 8449 3567 8450 3565 8452 3564 8451
3563 8457 3564 8462 3562 8465 3559 8483
TIME...MOT...LOC 1528Z 249DEG 51KT 3591 8442 3575 8451 3568 8463 3557
8473 3554 8483
$$
DieganThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 6, 3:44 AM EST | Wind Advisory | MRX | Blount, Cocke, Sevier | 10 hr |
| Dec 6, 8:25 AM EST | Severe Thunderstorm Warning | MRX | Morgan, Scott | 50 min |
| Dec 6, 9:06 AM EST | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Claiborne, Scott, Union | 39 min |
| Dec 6, 9:19 AM EST | Severe Thunderstorm Warning | MRX | Bledsoe, Hamilton, Rhea, Sequatchie | 56 min |
| Dec 6, 9:46 AM EST | Special Weather Statement | MRX | Anderson, Claiborne, Grainger, Hamblen, Hancock, Knox and 1 more | 44 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.