Alert archive / Tennessee / Tornado Warnings in 2021

Tornado Warning 41, NWS Nashville, TN

December 6, 2021Montgomery County, Robertson County, Tennessee

NWS Nashville, TN issued this tornado warning at Dec 6, 2021, 4:51 AM CST for Montgomery County, Robertson County, Tennessee. It was in force for 12 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 6, 2021, 4:51 AM CST (10:51 UTC)
Expired: Dec 6, 2021, 5:03 AM CST
In force: 12 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Montgomery County, TN, Robertson County, TN

The radar

The Ft Campbell radar (KHPX), 42 km from the middle of the area, began a volume at 10:51 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, 5:10 AM CST	TSTM WND DMG	Springfield, TN	TWO STRUCTURE FIRES FROM LIGHTNING STRIKES IN MARTIN CHAPEL AREA. 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 00:00Z, 10.9 hours before the alert went out and 53 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: 666 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 658 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 346 m²/s²
0-3 km storm-relative helicity: 484 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 5.4

Open this sounding in Storm Lab

The text

As transmitted.

878 
WFUS54 KOHX 061051
TOROHX
TNC125-147-061115-
/O.NEW.KOHX.TO.W.0041.211206T1051Z-211206T1115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Nashville TN
451 AM CST Mon Dec 6 2021

The National Weather Service in Nashville has issued a

* Tornado Warning for...
  Northeastern Montgomery County in Middle Tennessee...
  Northern Robertson County in Middle Tennessee...

* Until 515 AM CST.
    
* At 451 AM CST, a severe thunderstorm capable of producing a tornado
  was located near Guthrie, or 13 miles east of Clarksville, moving
  east at 50 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Springfield, White House, Cross Plains, Orlinda, Adams and Cedar
  Hill.

This includes Interstate 65 between mile markers 106 and 107.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3643 8670 3659 8720 3664 8718 3665 8661
TIME...MOT...LOC 1051Z 290DEG 44KT 3661 8710 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Shamburger

2 follow-up statements

187 
WWUS54 KOHX 061056
SVSOHX

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

TNC125-061106-
/O.CAN.KOHX.TO.W.0041.000000T0000Z-211206T1115Z/
Montgomery TN-
456 AM CST Mon Dec 6 2021

...THE TORNADO WARNING FOR NORTHEASTERN MONTGOMERY COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 3643 8670 3656 8710 3664 8710 3665 8661
TIME...MOT...LOC 1056Z 290DEG 44KT 3659 8703 

$$

TNC147-061115-
/O.CON.KOHX.TO.W.0041.000000T0000Z-211206T1115Z/
Robertson TN-
456 AM CST Mon Dec 6 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 AM CST FOR NORTHERN
ROBERTSON COUNTY...
    
At 456 AM CST, a severe thunderstorm capable of producing a tornado 
was located near Adams, or 10 miles northwest of Springfield, moving 
east at 50 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Springfield, White House, Cross Plains, Orlinda, Adams and Cedar
Hill.

This includes Interstate 65 between mile markers 106 and 107.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3643 8670 3656 8710 3664 8710 3665 8661
TIME...MOT...LOC 1056Z 290DEG 44KT 3659 8703 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Shamburger

570 
WWUS54 KOHX 061103
SVSOHX

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

TNC147-061113-
/O.CAN.KOHX.TO.W.0041.000000T0000Z-211206T1115Z/
Robertson TN-
503 AM CST Mon Dec 6 2021

...THE TORNADO WARNING FOR NORTHERN ROBERTSON COUNTY IS CANCELLED...
                
The storm which prompted the warning no longer appears capable of 
producing a tornado. Therefore, the warning has been cancelled.

Remember, a Severe Thunderstorm Warning still remains in effect for 
Robertson County.

LAT...LON 3643 8670 3656 8710 3664 8710 3665 8661
TIME...MOT...LOC 1101Z 290DEG 44KT 3656 8692 

$$

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, 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, 7:11 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

Tornado Warnings in Tennessee, 2021 Every tornado warning in 2021 Tornadoes 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.