Alert archive / Tennessee / Tornado Warnings in 2021

Tornado Warning 10, NWS Huntsville, AL

December 6, 2021Moore County, Tennessee

NWS Huntsville, AL issued this tornado warning at Dec 6, 2021, 7:42 AM CST for Moore County, Tennessee. It was in force for 6 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 6, 2021, 7:42 AM CST (13:42 UTC)
Expired: Dec 6, 2021, 7:48 AM CST
In force: 6 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Moore County, TN

The radar

The Northeast Alabama radar (KHTX), 53 km from the middle of the area, began a volume at 13:45 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, 7:42 AM CST	TSTM WND DMG	8 Nne Lynchburg, TN	EMERGENCY MANAGER REPORTS TREES, POWERLINES, AND HOME DAMAGE IN NORTHERN MOORE COUNTY NEAR LEDFORD MILL ROAD WEST NORTHWEST OF TULLAHOMA.
Dec 6, 7:42 AM CST	TORNADO	8 Nne Lynchburg, TN	NATIONAL WEATHER SERVICE METEOROLOGISTS, ALONG WITH MOORE COUNTY EMA, SURVEYED DAMAGE IN NORTHERN MOORE COUNTY AND DETERMINED THAT IT WAS CAUSED BY AN EF-1 TORNADO. THE TORNADO CROSSED BRINKLEY ROAD WHERE SEVERAL TREES WERE UPROOTED. IT CONTINUED TO MOVE TO TH

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, 1.7 hours before the alert went out and 88 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.

392 
WFUS54 KHUN 061342
TORHUN
TNC127-061415-
/O.NEW.KHUN.TO.W.0010.211206T1342Z-211206T1415Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Huntsville AL
742 AM CST Mon Dec 6 2021

The National Weather Service in Huntsville Alabama has issued a

* Tornado Warning for...
  Northeastern Moore County in Middle Tennessee...

* Until 815 AM CST.
    
* At 742 AM CST, a severe thunderstorm capable of producing a tornado
  was located near Tullahoma, or 8 miles northeast of Lynchburg,
  moving east at 55 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.

* This tornadic thunderstorm will remain over mainly rural areas of
  northeastern Moore County.

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 3541 8625 3539 8628 3538 8625 3537 8626
      3537 8627 3535 8624 3535 8625 3536 8635
      3537 8633 3538 8633 3539 8630 3541 8629
TIME...MOT...LOC 1342Z 271DEG 48KT 3540 8629 

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

$$

KTW

1 follow-up statement

510 
WWUS54 KHUN 061348
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
748 AM CST Mon Dec 6 2021

TNC127-061358-
/O.CAN.KHUN.TO.W.0010.000000T0000Z-211206T1415Z/
Moore TN-
748 AM CST Mon Dec 6 2021

...THE TORNADO WARNING FOR NORTHEASTERN MOORE COUNTY IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

LAT...LON 3541 8625 3539 8628 3538 8625 3537 8626
      3537 8627 3535 8624 3535 8625 3536 8635
      3537 8633 3538 8633 3539 8630 3541 8629
TIME...MOT...LOC 1347Z 271DEG 48KT 3540 8618 

$$

KTW

The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 6, 7:02 AM CST	Severe Thunderstorm Warning	HUN	Lincoln	28 min
Dec 6, 7:27 AM CST	Severe Thunderstorm Warning Considerable damage threat	HUN	Franklin, Lincoln, Moore	33 min
Dec 6, 8:22 AM CST	Special Weather Statement	HUN	Franklin	38 min
Dec 6, 8:29 AM CST	Severe Thunderstorm Warning	HUN	Franklin	16 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.