Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 151, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Dec 11, 2021, 9:44 AM EST for 6 counties in Tennessee. It was in force for 46 min. 4 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
- Dec 11, 2021, 9:44 AM EST (14:44 UTC)
- Expired
- Dec 11, 2021, 10:30 AM EST
- In force
- 46 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bradley County, TN, Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Roane County, TN
The radar
The Knoxville radar (KMRX), 130 km from the middle of the area, began a volume at 14:43 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 11, 10:10 AM EST | NON-TSTM WND GST 52 | 2 Nw Madisonville, TN | AWOS STATION KMNV MONROE COUNTY AIRPORT. |
| Dec 11, 10:15 AM EST | TSTM WND DMG | Englewood, TN | MULTIPLE TREES AND POWER LINES DOWN. |
| Dec 11, 10:20 AM EST | TSTM WND DMG | Etowah, TN | MULTIPLE TREES AND POWER LINES DOWN. |
| Dec 11, 10:40 AM EST | TSTM WND DMG | 5 E Madisonville, TN | NUMEROUS 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 2.7 hours before the alert went out and 232 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
- 182 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 625 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 268 m²/s²
- 0-3 km storm-relative helicity
- 271 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.8
The text
As transmitted.
726
WUUS54 KMRX 111444
SVRMRX
TNC011-105-107-121-123-145-111530-
/O.NEW.KMRX.SV.W.0151.211211T1444Z-211211T1530Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
944 AM EST Sat Dec 11 2021
The National Weather Service in Morristown has issued a
* Severe Thunderstorm Warning for...
Northeastern Bradley County in east Tennessee...
Southern Loudon County in east Tennessee...
Central Meigs County in east Tennessee...
McMinn County in east Tennessee...
Western Monroe County in east Tennessee...
Southern Roane County in east Tennessee...
* Until 1030 AM EST.
* At 944 AM EST, severe thunderstorms were located along a line
extending from 10 miles southwest of Fairview to 6 miles north of
Cleveland, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Athens, Sweetwater, Loudon, Madisonville, Decatur, Etowah,
Charleston, Englewood, Vonore and Greenback.
This includes Interstate 75 in Tennessee between mile markers 30 and
70.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3524 8496 3568 8468 3571 8457 3572 8417
3567 8415 3528 8442 3528 8450 3527 8451
TIME...MOT...LOC 1444Z 253DEG 43KT 3565 8465 3527 8490
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SR1 follow-up statement
975
WWUS54 KMRX 111516
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
1016 AM EST Sat Dec 11 2021
TNC011-121-145-111526-
/O.CAN.KMRX.SV.W.0151.000000T0000Z-211211T1530Z/
Bradley TN-Meigs TN-Roane TN-
1016 AM EST Sat Dec 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BRADLEY...CENTRAL
MEIGS AND SOUTHERN ROANE COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3528 8469 3566 8441 3571 8438 3572 8417
3567 8415 3528 8442 3528 8450 3527 8451
TIME...MOT...LOC 1516Z 253DEG 43KT 3576 8421 3538 8446
$$
TNC105-107-123-111530-
/O.CON.KMRX.SV.W.0151.000000T0000Z-211211T1530Z/
Loudon TN-McMinn TN-Monroe TN-
1016 AM EST Sat Dec 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 AM EST
FOR SOUTHEASTERN LOUDON...SOUTHEASTERN MCMINN AND WESTERN MONROE
COUNTIES...
At 1016 AM EST, severe thunderstorms were located along a line
extending from near Lenoir City to near Etowah, moving east at 50
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Athens, Sweetwater, Loudon, Madisonville, Etowah, Englewood, Vonore,
Greenback, Philadelphia and Fort Loudon State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3528 8469 3566 8441 3571 8438 3572 8417
3567 8415 3528 8442 3528 8450 3527 8451
TIME...MOT...LOC 1516Z 253DEG 43KT 3576 8421 3538 8446
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SRThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 11, 5:57 AM EST | Severe Thunderstorm Warning | MRX | Campbell, Scott | 48 min |
| Dec 11, 6:39 AM EST | Severe Thunderstorm Warning | MRX | Campbell, Scott | 51 min |
| Dec 11, 7:29 AM EST | Severe Thunderstorm Warning | MRX | Campbell, Scott | 46 min |
| Dec 11, 7:43 AM EST | Flash Flood Warning | MRX | Scott | 4 hr |
| Dec 11, 7:51 AM EST | Special Weather Statement | MRX | Campbell, Morgan | 54 min |
| Dec 11, 8:23 AM EST | Severe Thunderstorm Warning | MRX | Marion, Sequatchie | 52 min |
| Dec 11, 8:23 AM EST | Severe Thunderstorm Warning | MRX | Campbell, Claiborne, Scott | 37 min |
| Dec 11, 9:02 AM EST | Severe Thunderstorm Warning | MRX | Bledsoe, Bradley, Hamilton, McMinn, Meigs, Rhea and 1 more | 43 min |
| Dec 11, 9:18 AM EST | Special Weather Statement | MRX | Hamilton | 42 min |
| Dec 11, 9:18 AM EST | Severe Thunderstorm Warning | MRX | Bledsoe, Meigs, Rhea, Roane | 42 min |
| Dec 11, 9:34 AM EST | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, Marion | 41 min |
| Dec 11, 9:51 AM EST | Severe Thunderstorm Warning | MRX | Anderson, Blount, Knox, Loudon, Roane | 39 min |
| Dec 11, 10:15 AM EST | Severe Thunderstorm Warning | MRX | Bradley, McMinn, Monroe, Polk | 45 min |
| Dec 11, 10:21 AM EST | Severe Thunderstorm Warning | MRX | Blount, Grainger, Jefferson, Knox, Sevier | 39 min |
| Dec 11, 10:25 AM EST | Severe Thunderstorm Warning | MRX | Blount, Loudon, McMinn, Monroe | 50 min |
| Dec 11, 10:30 AM EST | Special Weather Statement | MRX | Bradley | 45 min |
| Dec 11, 10:53 AM EST | Severe Thunderstorm Warning | MRX | Cocke, Grainger, Greene, Hamblen, Hawkins, Jefferson | 35 min |
| Dec 11, 10:59 AM EST | Special Weather Statement | MRX | Polk | 46 min |
| Dec 11, 10:59 AM EST | Severe Thunderstorm Warning | MRX | Blount, Cocke, Jefferson, Sevier | 30 min |
| Dec 11, 11:28 AM EST | Special Weather Statement | MRX | Sullivan | 47 min |
| Dec 11, 11:49 AM EST | Special Weather Statement | MRX | Carter, Johnson, Washington | 41 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.