Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 158, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Dec 29, 2021, 9:08 PM EST for Bradley County, McMinn County, Polk County, Tennessee. It was in force for 24 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 29, 2021, 9:08 PM EST (02:08 UTC)
- Expired
- Dec 29, 2021, 9:32 PM EST
- In force
- 24 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bradley County, TN, McMinn County, TN, Polk County, TN
The radar
The Northeast Alabama radar (KHTX), 127 km from the middle of the area, began a volume at 02:11 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 29, 9:15 PM EST | TSTM WND DMG | 5 Sw Cleveland, TN | TREES DOWN NEAR INTERSECTION OF BANCROFT AND SOUTH LEE HIGHWAY. |
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 00:00Z, 2.1 hours before the alert went out and 195 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1029 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- -111 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
742
WUUS54 KMRX 300208
SVRMRX
TNC011-107-139-300245-
/O.NEW.KMRX.SV.W.0158.211230T0208Z-211230T0245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
908 PM EST Wed Dec 29 2021
The National Weather Service in Morristown has issued a
* Severe Thunderstorm Warning for...
Bradley County in east Tennessee...
Central Polk County in east Tennessee...
Southern McMinn County in east Tennessee...
* Until 945 PM EST.
* At 907 PM EST, severe thunderstorms were located along a line
extending from near Charleston to Cleveland to 7 miles west of
South Cleveland, moving east at 65 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Cleveland, Benton, Etowah, Charleston, South Cleveland, East
Cleveland, Wildwood Lake, Calhoun, Waterville and Parksville.
This includes Interstate 75 in Tennessee between mile markers 16 and
41.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3506 8500 3513 8503 3516 8501 3519 8501
3526 8497 3533 8489 3536 8488 3535 8486
3538 8485 3540 8441 3533 8440 3532 8445
3529 8450 3524 8439 3521 8438 3505 8454
TIME...MOT...LOC 0207Z 264DEG 58KT 3535 8475 3518 8488 3507 8503
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BW1 follow-up statement
810
WWUS54 KMRX 300232
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
932 PM EST Wed Dec 29 2021
TNC011-107-139-300241-
/O.CAN.KMRX.SV.W.0158.000000T0000Z-211230T0245Z/
Bradley TN-Polk TN-McMinn TN-
932 PM EST Wed Dec 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR BRADLEY...CENTRAL POLK AND
SOUTHERN MCMINN COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are
still possible with these thunderstorms.
LAT...LON 3506 8500 3513 8503 3516 8501 3519 8501
3526 8497 3533 8489 3536 8488 3535 8486
3538 8485 3540 8441 3533 8440 3532 8445
3529 8450 3524 8439 3521 8438 3505 8454
TIME...MOT...LOC 0230Z 264DEG 58KT 3535 8475 3518 8488 3507 8503
$$
BWThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 29, 7:48 PM EST | Special Weather Statement | MRX | Marion, Sequatchie | 42 min |
| Dec 29, 8:25 PM EST | Special Weather Statement | MRX | Hamilton, Marion, Sequatchie | 50 min |
| Dec 29, 8:41 PM EST | Special Weather Statement | MRX | Meigs, Rhea | 49 min |
| Dec 29, 8:54 PM EST | Special Weather Statement | MRX | Bradley, Hamilton | 36 min |
| Dec 29, 9:18 PM EST | Special Weather Statement | MRX | Blount, Loudon, Monroe | 27 min |
| Dec 29, 9:27 PM EST | Special Weather Statement | MRX | Bradley | 33 min |
| Dec 29, 9:31 PM EST | Special Weather Statement | MRX | Monroe, Polk | 29 min |
| Dec 29, 9:50 PM EST | Special Weather Statement | MRX | Blount | 25 min |
| Dec 30, 7:21 AM EST | Dense Fog Advisory | MRX | Anderson, Bledsoe, Blount, Bradley, Campbell, Cocke and 18 more | 3 hr |
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.