Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 92, NWS Huntsville, AL

December 6, 2021Franklin County, Lincoln County, Moore County, Tennessee

NWS Huntsville, AL issued this severe thunderstorm warning at Dec 6, 2021, 7:27 AM CST for Franklin County, Lincoln County, Moore County, Tennessee. It was in force for 33 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, 7:27 AM CST (13:27 UTC)
Expired: Dec 6, 2021, 8:00 AM CST
In force: 33 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Franklin County, TN, Lincoln County, TN, Moore County, TN

The radar

The Northeast Alabama radar (KHTX), 50 km from the middle of the area, began a volume at 13:30 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, 1.5 hours before the alert went out and 95 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.

136 
WUUS54 KHUN 061327
SVRHUN
TNC051-103-127-061400-
/O.NEW.KHUN.SV.W.0092.211206T1327Z-211206T1400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
727 AM CST Mon Dec 6 2021

The National Weather Service in Huntsville Alabama has issued a

* Severe Thunderstorm Warning for...
  Moore County in Middle Tennessee...
  Lincoln County in Middle Tennessee...
  Western Franklin County in Middle Tennessee...

* Until 800 AM CST.

* At 727 AM CST, severe thunderstorms were located along a line
  extending from 9 miles northwest of Shelbyville to near Petersburg
  to 11 miles east of Pulaski, moving southeast at 45 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Winchester, Fayetteville, Lynchburg, Decherd, Estill Springs,
  Huntland, Petersburg, Tims Ford Lake, Lincoln and Howell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3539 8628 3538 8625 3537 8627 3534 8624
      3533 8620 3536 8616 3533 8602 3515 8608
      3499 8638 3499 8653 3513 8683 3526 8683
      3525 8675 3531 8668 3533 8660 3537 8659
      3536 8649 3532 8642 3535 8641 3541 8626
TIME...MOT...LOC 1327Z 292DEG 39KT 3561 8653 3534 8662 3522 8684 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

KTW

2 follow-up statements

359 
WWUS54 KHUN 061333
SVSHUN

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

TNC051-103-127-061400-
/O.CON.KHUN.SV.W.0092.000000T0000Z-211206T1400Z/
Moore TN-Lincoln TN-Franklin TN-
733 AM CST Mon Dec 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 AM CST
FOR MOORE...NORTHEASTERN LINCOLN AND NORTHWESTERN FRANKLIN
COUNTIES...

At 733 AM CST, severe thunderstorms were located along a line
extending from 6 miles north of Shelbyville to near Petersburg to 11
miles west of Fayetteville, moving east at 45 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Winchester, Lynchburg, Decherd, Estill Springs, Tims Ford Lake, Lexie
Crossroads, Mulberry, Chestnut Ridge, Harmony and Belleville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3539 8628 3538 8625 3537 8627 3534 8624
      3533 8620 3536 8616 3533 8602 3515 8608
      3514 8621 3514 8633 3516 8642 3520 8651
      3524 8658 3529 8664 3533 8660 3537 8659
      3536 8649 3532 8642 3535 8641 3541 8626
TIME...MOT...LOC 1333Z 292DEG 39KT 3559 8646 3532 8655 3520 8677 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

KTW

134 
WWUS54 KHUN 061356
SVSHUN

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

TNC051-103-127-061406-
/O.EXP.KHUN.SV.W.0092.000000T0000Z-211206T1400Z/
Moore TN-Lincoln TN-Franklin TN-
756 AM CST Mon Dec 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR MOORE...NORTHEASTERN LINCOLN
AND NORTHWESTERN FRANKLIN COUNTIES WILL EXPIRE AT 800 AM CST...

The storms which prompted the warning have weakened. Therefore, the 
warning will be allowed to expire.

LAT...LON 3539 8628 3538 8625 3537 8627 3534 8624
      3533 8620 3536 8616 3533 8602 3515 8608
      3514 8621 3514 8633 3516 8642 3520 8651
      3524 8658 3529 8664 3533 8660 3537 8659
      3536 8649 3532 8642 3535 8641 3541 8626
TIME...MOT...LOC 1356Z 292DEG 39KT 3559 8646 3532 8655 3520 8677 

$$

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, 7:42 AM CST	Tornado Warning	HUN	Moore	6 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

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.