Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 166, NWS Nashville, TN
NWS Nashville, TN issued this severe thunderstorm warning at Dec 11, 2021, 7:22 AM CST for Coffee County, Grundy County, Tennessee. It was in force for 38 min. 2 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, 7:22 AM CST (13:22 UTC)
- Expired
- Dec 11, 2021, 8:00 AM CST
- In force
- 38 min
- Issued by
- NWS Nashville, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Coffee County, TN, Grundy County, TN
The radar
The Northeast Alabama radar (KHTX), 59 km from the middle of the area, began a volume at 13:23 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, 7:36 AM CST | TORNADO | 1 N Coalmont, TN | THE TORNADO TOUCHED DOWN IN COALMONT AND QUICKLY PRODUCED 90 MPH WINDS THAT UPROOTED MANY TREES ON FREEMONT ROAD. IT MOVED NORTHEAST AND BLEW OUT THE WALLS OF A METAL BUILDING STRUCTURE AND DOWNED ADDITIONAL TREES ON 20TH AVENUE SOUTH NEAR HIGHWAY 108. THE TOR |
| Dec 11, 7:39 AM CST | TSTM WND DMG | 1 Ne Coalmont, TN | TREES DOWN NEAR COALMONT IN GRUNDY COUNTY. |
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, 1.4 hours before the alert went out and 248 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.
704
WUUS54 KOHX 111322
SVROHX
TNC031-061-111400-
/O.NEW.KOHX.SV.W.0166.211211T1322Z-211211T1400Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
722 AM CST Sat Dec 11 2021
The National Weather Service in Nashville has issued a
* Severe Thunderstorm Warning for...
Southeastern Coffee County in Middle Tennessee...
Grundy County in Middle Tennessee...
* Until 800 AM CST.
* At 722 AM CST, a severe thunderstorm was located 10 miles southeast
of Manchester, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Gruetli-Laager, Tracy City, Monteagle, Altamont, Coalmont, Palmer,
Beersheba Springs, Hillsboro, Pelham and Fiery Gizzard State Park.
This includes Interstate 24 between mile markers 121 and 135.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 AM CST for Middle
Tennessee.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 1100 AM CST for Middle
Tennessee.
&&
LAT...LON 3522 8578 3524 8582 3522 8587 3529 8591
3532 8599 3552 8596 3552 8587 3551 8582
3553 8575 3553 8561 3549 8554 3543 8554
3542 8551 3541 8551 3541 8549 3538 8549
3532 8556 3529 8571 3524 8569 3522 8574
TIME...MOT...LOC 1322Z 268DEG 38KT 3539 8592
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
103 follow-up statements
140
WWUS54 KOHX 111333
SVSOHX
Severe Weather Statement
National Weather Service Nashville TN
733 AM CST Sat Dec 11 2021
TNC031-111343-
/O.CAN.KOHX.SV.W.0166.000000T0000Z-211211T1400Z/
Coffee TN-
733 AM CST Sat Dec 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN COFFEE COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 AM CST for Middle
Tennessee.
LAT...LON 3524 8582 3522 8587 3529 8591 3533 8591
3537 8587 3538 8589 3542 8589 3552 8588
3551 8582 3553 8575 3553 8561 3549 8554
3543 8554 3541 8549 3538 8549 3532 8556
3529 8571 3524 8569 3522 8574 3522 8578
TIME...MOT...LOC 1333Z 268DEG 38KT 3539 8577
$$
TNC061-111400-
/O.CON.KOHX.SV.W.0166.000000T0000Z-211211T1400Z/
Grundy TN-
733 AM CST Sat Dec 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 AM CST
FOR GRUNDY COUNTY...
At 733 AM CST, a severe thunderstorm was located 7 miles west of
Gruetli-Laager, or 17 miles east of Manchester, moving east at 45
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Gruetli-Laager, Tracy City, Monteagle, Altamont, Coalmont, Palmer,
Beersheba Springs, Pelham and Fiery Gizzard State Park.
This includes Interstate 24 between mile markers 127 and 135.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 AM CST for Middle
Tennessee.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3524 8582 3522 8587 3529 8591 3533 8591
3537 8587 3538 8589 3542 8589 3552 8588
3551 8582 3553 8575 3553 8561 3549 8554
3543 8554 3541 8549 3538 8549 3532 8556
3529 8571 3524 8569 3522 8574 3522 8578
TIME...MOT...LOC 1333Z 268DEG 38KT 3539 8577
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
10679
WWUS54 KOHX 111345
SVSOHX
Severe Weather Statement
National Weather Service Nashville TN
745 AM CST Sat Dec 11 2021
TNC061-111400-
/O.CON.KOHX.SV.W.0166.000000T0000Z-211211T1400Z/
Grundy TN-
745 AM CST Sat Dec 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 AM CST
FOR NORTHEASTERN GRUNDY COUNTY...
At 745 AM CST, a severe thunderstorm was located over Gruetli-Laager,
or 12 miles west of Dunlap, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Gruetli-Laager, Altamont, Coalmont, Palmer and Beersheba Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 AM CST for Middle
Tennessee.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3542 8574 3553 8569 3553 8561 3549 8554
3543 8554 3541 8549 3538 8549 3532 8556
3529 8568 3534 8573
TIME...MOT...LOC 1345Z 268DEG 38KT 3539 8561
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
10235
WWUS54 KOHX 111355
SVSOHX
Severe Weather Statement
National Weather Service Nashville TN
755 AM CST Sat Dec 11 2021
TNC061-111404-
/O.EXP.KOHX.SV.W.0166.000000T0000Z-211211T1400Z/
Grundy TN-
755 AM CST Sat Dec 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GRUNDY COUNTY
WILL EXPIRE AT 800 AM CST...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Tornado Watch remains in effect until 1100 AM CST for Middle
Tennessee.
LAT...LON 3542 8574 3553 8569 3553 8561 3549 8554
3543 8554 3541 8549 3538 8549 3532 8556
3529 8568 3534 8573
TIME...MOT...LOC 1354Z 268DEG 38KT 3539 8551
$$
10The office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 10, 11:29 PM CST | Tornado Warning | OHX | Stewart | 46 min |
| Dec 11, 12:03 AM CST | Tornado Warning | OHX | Montgomery, Stewart | 16 min |
| Dec 11, 12:19 AM CST | Severe Thunderstorm Warning | OHX | Montgomery, Stewart | 41 min |
| Dec 11, 1:28 AM CST | Severe Thunderstorm Warning | OHX | Stewart | 21 min |
| Dec 11, 1:47 AM CST | Severe Thunderstorm Warning | OHX | Dickson, Hickman, Houston, Humphreys, Lewis, Montgomery and 2 more | 73 min |
| Dec 11, 2:03 AM CST | Tornado Warning | OHX | Houston, Humphreys, Stewart | 27 min |
| Dec 11, 2:07 AM CST | Tornado Warning | OHX | Dickson, Hickman, Humphreys, Perry | 38 min |
| Dec 11, 2:23 AM CST | Tornado Warning | OHX | Dickson, Houston, Montgomery, Stewart | 37 min |
| Dec 11, 2:38 AM CST | Tornado Warning | OHX | Dickson, Hickman, Humphreys | 37 min |
| Dec 11, 2:39 AM CST | Tornado Warning | OHX | Cheatham, Dickson, Montgomery | 14 min |
| Dec 11, 2:47 AM CST | Severe Thunderstorm Warning | OHX | Cheatham, Davidson, Dickson, Hickman, Lewis, Maury and 5 more | 58 min |
| Dec 11, 2:58 AM CST | Tornado Warning | OHX | Cheatham, Davidson, Dickson, Williamson | 32 min |
| Dec 11, 2:59 AM CST | Tornado Warning | OHX | Davidson, Williamson | 31 min |
| Dec 11, 3:19 AM CST | Severe Thunderstorm Warning | OHX | Davidson, Hickman, Lewis, Marshall, Maury, Robertson and 5 more | 41 min |
| Dec 11, 3:21 AM CST | Tornado Warning | OHX | Davidson, Sumner, Wilson | 39 min |
| Dec 11, 3:29 AM CST | Severe Thunderstorm Warning | OHX | Davidson, Rutherford, Smith, Sumner, Trousdale, Williamson and 1 more | 46 min |
| Dec 11, 3:33 AM CST | Tornado Warning | OHX | Davidson, Macon, Smith, Sumner, Trousdale, Wilson | 42 min |
| Dec 11, 3:46 AM CST | Tornado Warning | OHX | Clay, Macon, Sumner, Trousdale | 44 min |
| Dec 11, 3:48 AM CST | Severe Thunderstorm Warning | OHX | Lewis, Perry, Wayne | 42 min |
| Dec 11, 3:50 AM CST | Severe Thunderstorm Warning | OHX | Clay, DeKalb, Jackson, Macon, Putnam, Smith and 3 more | 17 min |
| Dec 11, 3:56 AM CST | Tornado Warning | OHX | Lewis, Perry, Wayne | 13 min |
| Dec 11, 4:07 AM CST | Tornado Warning | OHX | Clay, Jackson, Macon, Overton, Smith, Trousdale | 38 min |
| Dec 11, 4:11 AM CST | Severe Thunderstorm Warning | OHX | Clay, Fentress, Jackson, Macon, Overton, Pickett and 4 more | 34 min |
| Dec 11, 4:33 AM CST | Tornado Warning | OHX | Clay, Fentress, Overton, Pickett | 42 min |
| Dec 11, 5:01 AM CST | Severe Thunderstorm Warning | OHX | Giles, Lawrence, Lewis, Marshall, Maury | 29 min |
| Dec 11, 5:21 AM CST | Severe Thunderstorm Warning | OHX | Overton, Putnam | 27 min |
| Dec 11, 5:39 AM CST | Severe Thunderstorm Warning | OHX | Giles, Lawrence, Wayne | 36 min |
| Dec 11, 5:56 AM CST | Severe Thunderstorm Warning | OHX | Giles, Lawrence, Marshall, Maury | 34 min |
| Dec 11, 6:13 AM CST | Tornado Warning | OHX | Giles | 15 min |
| Dec 11, 6:58 AM CST | Severe Thunderstorm Warning | OHX | Bedford, Coffee, Grundy, Warren | 32 min |
| Dec 11, 7:35 AM CST | Tornado Warning | OHX | Grundy | 25 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.