Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 149, NWS Nashville, TN

December 6, 20215 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Dec 6, 2021, 7:11 AM CST for 5 counties in Tennessee. It was in force for 49 min. 5 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 6, 2021, 7:11 AM CST (13:11 UTC)
Expired: Dec 6, 2021, 8:00 AM CST
In force: 49 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Cumberland County, TN, Fentress County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN

The radar

The Knoxville radar (KMRX), 129 km from the middle of the area, began a volume at 13:12 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, 7:20 AM CST	TSTM WND DMG	Jamestown, TN	TREES AND POWER LINES DOWN IN THE RIDGE TOP ACRES AREA OF JAMESTOWN. REPORT VIA FACEBOOK.
Dec 6, 7:22 AM CST	TSTM WND DMG	1 N Jamestown, TN	DAMAGE TO HVAC EQUIPMENT ON ROOF OF PINE HAVEN ELEMENTARY SCHOOL AS WELL AS OUTBUILDINGS BEHIND THE SCHOOL.
Dec 6, 7:22 AM CST	TSTM WND DMG	1 N Jamestown, TN	STRAIGHT LINE WINDS ESTIMATED UP TO 70 MPH KNOCKED OVER 3 HVAC UNITS ON THE ROOF OF PINE HAVEN ELEMENTARY SCHOOL AND DAMAGED A PORTABLE BUILDING. A DUGOUT AT THE BASEBALL FIELD ACROSS THE STREET COLLAPSED AND BLEACHERS WERE TURNED OVER.
Dec 6, 7:30 AM CST	TSTM WND DMG	8 Ssw Byrdstown, TN	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 8 SSW BYRDSTOWN. REPORT OF TREES DOWN IN ROADWAY ON WIRMINGHAM ROAD IN MONROE. TIME ESTIMATED VIA RADAR.
Dec 6, 7:30 AM CST	TSTM WND DMG	8 Ssw Byrdstown, TN	REPORT OF TREES DOWN IN ROADWAY ON WIRMINGHAM ROAD IN MONROE, WHICH IS IN EXTREME SOUTHERN OVERTON COUNTY. TIME ESTIMATED VIA RADAR.

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, 1.2 hours before the alert went out and 159 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted.

787 
WUUS54 KOHX 061311
SVROHX
TNC035-049-133-137-141-061400-
/O.NEW.KOHX.SV.W.0149.211206T1311Z-211206T1400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
711 AM CST Mon Dec 6 2021

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Eastern Overton County in Middle Tennessee...
  Pickett County in Middle Tennessee...
  Northern Cumberland County in Middle Tennessee...
  Eastern Putnam County in Middle Tennessee...
  Fentress County in Middle Tennessee...

* Until 800 AM CST.

* At 711 AM CST, severe thunderstorms were located along a line 
  extending from near Sunnybrook, Kentucky to near Algood, moving 
  east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Cookeville, Jamestown, Byrdstown, Fairfield Glade, Monterey,
  Allardt, Grimsley, Slate Springs, Rickman, Pall Mall, Clarkrange,
  Crawford and Pickett State Park.

This includes Interstate 40 between mile markers 289 and 316.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3637 8470 3638 8472 3635 8474 3634 8474
      3633 8477 3630 8480 3629 8487 3624 8488
      3621 8491 3615 8491 3613 8487 3608 8483
      3610 8482 3609 8480 3600 8472 3595 8470
      3609 8551 3662 8510 3660 8478 3640 8466
TIME...MOT...LOC 1311Z 273DEG 39KT 3660 8504 3616 8538 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Shamburger

2 follow-up statements

347 
WWUS54 KOHX 061329
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
729 AM CST Mon Dec 6 2021

TNC035-049-133-137-141-061400-
/O.CON.KOHX.SV.W.0149.000000T0000Z-211206T1400Z/
Overton TN-Pickett TN-Cumberland TN-Putnam TN-Fentress TN-
729 AM CST Mon Dec 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 AM CST
FOR SOUTHEASTERN OVERTON...NORTHEASTERN PICKETT...NORTHERN
CUMBERLAND...SOUTHEASTERN PUTNAM AND FENTRESS COUNTIES...

At 729 AM CST, severe thunderstorms were located along a line 
extending from near Pickett State Forest to near Jamestown to near 
Monterey, moving east at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Jamestown, Fairfield Glade, Monterey, Allardt, Grimsley, Slate
Springs, Clarkrange, Crawford and Pickett State Park.

This includes Interstate 40 between mile markers 298 and 316.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3637 8470 3638 8472 3635 8474 3634 8474
      3633 8477 3630 8480 3629 8487 3624 8488
      3621 8491 3615 8491 3613 8487 3608 8483
      3610 8482 3609 8480 3600 8472 3595 8470
      3607 8540 3661 8486 3660 8478 3640 8466
TIME...MOT...LOC 1329Z 270DEG 46KT 3659 8474 3636 8488 3609 8522 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Shamburger

425 
WWUS54 KOHX 061341
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
741 AM CST Mon Dec 6 2021

TNC133-137-141-061349-
/O.CAN.KOHX.SV.W.0149.000000T0000Z-211206T1400Z/
Overton TN-Pickett TN-Putnam TN-
741 AM CST Mon Dec 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OVERTON...
NORTHEASTERN PICKETT AND SOUTHEASTERN PUTNAM COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 3637 8470 3638 8472 3630 8480 3629 8487
      3628 8487 3628 8488 3621 8491 3615 8491
      3608 8483 3609 8480 3595 8470 3604 8524
      3610 8515 3614 8510 3649 8471 3640 8466
TIME...MOT...LOC 1339Z 272DEG 39KT 3658 8461 3635 8475 3607 8514 

$$

TNC035-049-061400-
/O.CON.KOHX.SV.W.0149.000000T0000Z-211206T1400Z/
Cumberland TN-Fentress TN-
741 AM CST Mon Dec 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 AM CST
FOR NORTHERN CUMBERLAND AND SOUTHEASTERN FENTRESS COUNTIES...

At 739 AM CST, severe thunderstorms were located along a line 
extending from Oneida to Clarkrange to Mayland, moving east at 45 
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Fairfield Glade, Slate Springs and Clarkrange. 

This includes Interstate 40 between mile markers 308 and 316.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3637 8470 3638 8472 3630 8480 3629 8487
      3628 8487 3628 8488 3621 8491 3615 8491
      3608 8483 3609 8480 3595 8470 3604 8524
      3610 8515 3614 8510 3649 8471 3640 8466
TIME...MOT...LOC 1339Z 272DEG 39KT 3658 8461 3635 8475 3607 8514 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Shamburger

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 5, 6:25 PM CST	Special Weather Statement	OHX	Hickman	35 min
Dec 6, 12:53 AM CST	Special Weather Statement	OHX	Stewart	52 min
Dec 6, 3:54 AM CST	Severe Thunderstorm Warning	OHX	Houston, Montgomery, Stewart	51 min
Dec 6, 4:14 AM CST	Tornado Warning	OHX	Stewart	16 min
Dec 6, 4:39 AM CST	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Houston, Montgomery, Robertson	41 min
Dec 6, 4:51 AM CST	Tornado Warning	OHX	Montgomery, Robertson	12 min
Dec 6, 5:09 AM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Robertson, Sumner, Wilson	36 min
Dec 6, 5:16 AM CST	Special Weather Statement	OHX	Dickson, Hickman, Perry	59 min
Dec 6, 5:46 AM CST	Special Weather Statement	OHX	Macon, Smith, Sumner, Trousdale, Wilson	44 min
Dec 6, 6:02 AM CST	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Smith, Trousdale, Wilson	43 min
Dec 6, 6:03 AM CST	Tornado Warning	OHX	Macon, Smith, Trousdale	27 min
Dec 6, 6:32 AM CST	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Wayne	58 min
Dec 6, 6:38 AM CST	Severe Thunderstorm Warning	OHX	Clay, Fentress, Jackson, Overton, Pickett, Putnam and 1 more	37 min
Dec 6, 6:40 AM CST	Tornado Warning	OHX	Giles, Lawrence	35 min
Dec 6, 6:56 AM CST	Tornado Warning	OHX	Clay, Overton, Pickett	19 min
Dec 6, 7:15 AM CST	Tornado Warning	OHX	Fentress, Pickett	30 min
Dec 6, 7:21 AM CST	Severe Thunderstorm Warning	OHX	Bedford, Coffee, Giles, Marshall	39 min
Dec 6, 7:40 AM CST	Tornado Warning	OHX	Bedford, Coffee	21 min
Dec 6, 7:59 AM CST	Severe Thunderstorm Warning	OHX	Coffee, Grundy, Warren	31 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2021 Every 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.