Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 148, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Dec 11, 2021, 8:02 AM CST for 7 counties in Tennessee. It was in force for 43 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 11, 2021, 8:02 AM CST (14:02 UTC)
- Expired
- Dec 11, 2021, 8:45 AM CST
- In force
- 43 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bledsoe County, TN, Bradley County, TN, Hamilton County, TN, McMinn County, TN, Meigs County, TN, Rhea County, TN, Sequatchie County, TN
The radar
The Northeast Alabama radar (KHTX), 99 km from the middle of the area, began a volume at 14:03 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, 8:10 AM CST | TSTM WND DMG | 5 S Pikeville, TN | TREES DOWN IN MULTIPLE LOCATIONS SOUTH OF PIKEVILLE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Dec 11, 3:41 AM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 2.0 hours before the alert went out and 234 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.
658
WUUS54 KMRX 111402
SVRMRX
TNC007-011-065-107-121-143-153-111445-
/O.NEW.KMRX.SV.W.0148.211211T1402Z-211211T1445Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
902 AM EST Sat Dec 11 2021
The National Weather Service in Morristown has issued a
* Severe Thunderstorm Warning for...
Southern Rhea County in east Tennessee...
Northern Bradley County in east Tennessee...
Eastern Sequatchie County in east Tennessee...
Southwestern Bledsoe County in east Tennessee...
Meigs County in east Tennessee...
Western McMinn County in east Tennessee...
Northern Hamilton County in east Tennessee...
* Until 945 AM EST/845 AM CST/.
* At 901 AM EST/801 AM CST/, severe thunderstorms were located along
a line extending from 8 miles southwest of Pikeville to near
Fairmount, moving east at 60 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Cleveland, Dayton, Pikeville, Decatur, Soddy-Daisy, Signal
Mountain, Walden, Lakesite, Charleston and Fairmount.
This includes Interstate 75 in Tennessee between mile markers 27 and
45.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until noon EST/1100 AM CST/ for
east Tennessee.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3517 8540 3521 8540 3539 8530 3548 8540
3554 8544 3559 8530 3565 8462 3563 8457
3522 8480
TIME...MOT...LOC 1401Z 253DEG 54KT 3550 8526 3522 8540
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SR1 follow-up statement
776
WWUS54 KMRX 111430
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
930 AM EST Sat Dec 11 2021
TNC007-153-111439-
/O.CAN.KMRX.SV.W.0148.000000T0000Z-211211T1445Z/
Sequatchie TN-Bledsoe TN-
930 AM EST Sat Dec 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN SEQUATCHIE AND
SOUTHWESTERN BLEDSOE COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until noon EST for east Tennessee.
LAT...LON 3519 8522 3532 8514 3540 8507 3546 8505
3556 8499 3562 8497 3565 8462 3563 8457
3522 8480
TIME...MOT...LOC 1429Z 253DEG 54KT 3562 8479 3534 8494
$$
TNC011-065-107-121-143-111445-
/O.CON.KMRX.SV.W.0148.000000T0000Z-211211T1445Z/
Rhea TN-Bradley TN-Meigs TN-McMinn TN-Hamilton TN-
930 AM EST Sat Dec 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM EST
FOR SOUTHEASTERN RHEA...NORTHERN BRADLEY...MEIGS...WESTERN MCMINN AND
NORTHEASTERN HAMILTON COUNTIES...
At 929 AM EST, severe thunderstorms were located along a line
extending from 6 miles north of Decatur to 10 miles west of
Charleston, moving east at 60 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Cleveland, Dayton, Decatur, Soddy-Daisy, Lakesite, Charleston, Clear
Water, Peakland, Hillsview and Hopewell.
This includes Interstate 75 in Tennessee between mile markers 27 and
45.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until noon EST for east Tennessee.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3519 8522 3532 8514 3540 8507 3546 8505
3556 8499 3562 8497 3565 8462 3563 8457
3522 8480
TIME...MOT...LOC 1429Z 253DEG 54KT 3562 8479 3534 8494
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 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, 4:57 AM CST | Severe Thunderstorm Warning | MRX | Campbell, Scott | 48 min |
| Dec 11, 5:39 AM CST | Severe Thunderstorm Warning | MRX | Campbell, Scott | 51 min |
| Dec 11, 6:29 AM CST | Severe Thunderstorm Warning | MRX | Campbell, Scott | 46 min |
| Dec 11, 6:43 AM CST | Flash Flood Warning | MRX | Scott | 4 hr |
| Dec 11, 6:51 AM CST | Special Weather Statement | MRX | Campbell, Morgan | 54 min |
| Dec 11, 7:23 AM CST | Severe Thunderstorm Warning | MRX | Marion, Sequatchie | 52 min |
| Dec 11, 7:23 AM CST | Severe Thunderstorm Warning | MRX | Campbell, Claiborne, Scott | 37 min |
| Dec 11, 8:18 AM CST | Special Weather Statement | MRX | Hamilton | 42 min |
| Dec 11, 8:18 AM CST | Severe Thunderstorm Warning | MRX | Bledsoe, Meigs, Rhea, Roane | 42 min |
| Dec 11, 8:34 AM CST | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, Marion | 41 min |
| Dec 11, 8:44 AM CST | Severe Thunderstorm Warning | MRX | Bradley, Loudon, McMinn, Meigs, Monroe, Roane | 46 min |
| Dec 11, 8:51 AM CST | Severe Thunderstorm Warning | MRX | Anderson, Blount, Knox, Loudon, Roane | 39 min |
| Dec 11, 9:15 AM CST | Severe Thunderstorm Warning | MRX | Bradley, McMinn, Monroe, Polk | 45 min |
| Dec 11, 9:21 AM CST | Severe Thunderstorm Warning | MRX | Blount, Grainger, Jefferson, Knox, Sevier | 39 min |
| Dec 11, 9:25 AM CST | Severe Thunderstorm Warning | MRX | Blount, Loudon, McMinn, Monroe | 50 min |
| Dec 11, 9:30 AM CST | Special Weather Statement | MRX | Bradley | 45 min |
| Dec 11, 9:53 AM CST | Severe Thunderstorm Warning | MRX | Cocke, Grainger, Greene, Hamblen, Hawkins, Jefferson | 35 min |
| Dec 11, 9:59 AM CST | Special Weather Statement | MRX | Polk | 46 min |
| Dec 11, 9:59 AM CST | Severe Thunderstorm Warning | MRX | Blount, Cocke, Jefferson, Sevier | 30 min |
| Dec 11, 10:28 AM CST | Special Weather Statement | MRX | Sullivan | 47 min |
| Dec 11, 10:49 AM CST | 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.