Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 148, NWS Nashville, TN

December 6, 20217 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Dec 6, 2021, 6:38 AM CST for 7 counties in Tennessee. It was in force for 37 min. 8 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, 6:38 AM CST (12:38 UTC)
Expired: Dec 6, 2021, 7:15 AM CST
In force: 37 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Clay County, TN, Fentress County, TN, Jackson County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Smith County, TN

The radar

The Nashville radar (KOHX), 125 km from the middle of the area, began a volume at 12:38 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, 6:56 AM CST	TORNADO	6 Nne Livingston, TN	AN EF0 TORNADO TOUCHED DOWN WEST OF INDEPENDENCE ROAD NORTHEAST OF ALLONS AND MOVED EAST ACROSS MULLINS LANE AND STOVER ROAD BLOWING DOWN TREES AND DAMAGING THE ROOFS OF SEVERAL BARNS. THE TORNADO TOOK A SLIGHT NORTHEAST TURN ACROSS THE INTERSECTION OF WILLOW
Dec 6, 7:00 AM CST	TSTM WND DMG	3 Wnw Cookeville, TN	FACEBOOK PHOTO OF BARN PARTIALLY COLLAPSED ON PIPPIN ROAD.
Dec 6, 7:04 AM CST	TORNADO	7 Ssw Byrdstown, TN	AN EF0 TORNADO TOUCHED DOWN NEAR THE MONROE COMMUNITY EAST OF GARRETT TOWN LANE AND MOVED EASTWARD, BLOWING DOWN A FEW TREES. IT CROSSED HIGHWAY 111 CAUSING DAMAGE TO FENCING AROUND THE RECYCLING PLANT AND DOWNED SEVERAL MORE TREES. AS IT CONTINUED EAST, THE T
Dec 6, 7:05 AM CST	TSTM WND DMG	7 Ssw Byrdstown, TN	TREES AND FENCES DOWN ON HIGHWAY 111 AT THE OVERTON AND PICKETT COUNTY LINE. REPORT VIA FACEBOOK.
Dec 6, 7:06 AM CST	TSTM WND DMG	6 Ne Livingston, TN	EMERGENCY MANAGEMENT REPORTED A FACEBOOK REPORT OF ROOF DAMAGE IN INDEPENDENCE. TIME ESTIMATED VIA RADAR.
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.

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, 0.6 hours before the alert went out and 132 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.

101 
WUUS54 KOHX 061238
SVROHX
TNC027-049-087-133-137-141-159-061315-
/O.NEW.KOHX.SV.W.0148.211206T1238Z-211206T1315Z/

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

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Overton County in Middle Tennessee...
  Pickett County in Middle Tennessee...
  Southeastern Smith County in Middle Tennessee...
  Jackson County in Middle Tennessee...
  Clay County in Middle Tennessee...
  Central Putnam County in Middle Tennessee...
  Northwestern Fentress County in Middle Tennessee...

* Until 715 AM CST.

* At 637 AM CST, severe thunderstorms were located along a line
  extending from near Celina to near Gordonsville, moving east at 50
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Cookeville, Livingston, Jamestown, Celina, Gainesboro, Byrdstown,
  Algood, Monterey, Baxter, Gordonsville, Whitleyville, Rickman, Pall
  Mall, Wolf River Dock, Crawford, Granville, Dale Hollow Lake,
  Pickett State Park, Static and Cummins Falls State Park.

This includes Interstate 40 between mile markers 260 and 264, and
between mile markers 279 and 303.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3662 8502 3660 8479 3657 8476 3611 8520
      3615 8597 3662 8552 3663 8527
TIME...MOT...LOC 1237Z 268DEG 43KT 3661 8547 3617 8588 

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

$$

Shamburger

1 follow-up statement

150 
WWUS54 KOHX 061307
SVSOHX

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

TNC027-087-159-061316-
/O.CAN.KOHX.SV.W.0148.000000T0000Z-211206T1315Z/
Smith TN-Jackson TN-Clay TN-
707 AM CST Mon Dec 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SMITH...JACKSON
AND CLAY COUNTIES IS CANCELLED...

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

LAT...LON 3662 8502 3660 8479 3657 8476 3611 8520
      3613 8558 3663 8518
TIME...MOT...LOC 1306Z 268DEG 43KT 3662 8505 3618 8547 

$$

TNC049-133-137-141-061315-
/O.CON.KOHX.SV.W.0148.000000T0000Z-211206T1315Z/
Overton TN-Pickett TN-Putnam TN-Fentress TN-
707 AM CST Mon Dec 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 AM CST
FOR OVERTON...PICKETT...CENTRAL PUTNAM AND NORTHWESTERN FENTRESS
COUNTIES...

At 706 AM CST, severe thunderstorms were located along a line 
extending from near Sunnybrook, Kentucky to Cookeville, moving east 
at 50 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Cookeville, Livingston, Jamestown, Byrdstown, Algood, Monterey,
Crawford, Huntersville, Rickman, Pall Mall, Pickett State Park and
Static.

This includes Interstate 40 between mile markers 284 and 303.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3662 8502 3660 8479 3657 8476 3611 8520
      3613 8558 3663 8518
TIME...MOT...LOC 1306Z 268DEG 43KT 3662 8505 3618 8547 

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, 6:40 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, 7:11 AM CST	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Pickett, Putnam	49 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.