Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 53, NWS Huntsville, AL

May 6, 2021Franklin County, Lincoln County, Tennessee

NWS Huntsville, AL issued this severe thunderstorm warning at May 6, 2021, 6:53 PM CDT for Franklin County, Lincoln County, Tennessee. It was in force for 37 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: May 6, 2021, 6:53 PM CDT (23:53 UTC)
Expired: May 6, 2021, 7:30 PM CDT
In force: 37 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Franklin County, TN, Lincoln County, TN

The radar

The Northeast Alabama radar (KHTX), 30 km from the middle of the area, began a volume at 23:54 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
May 6, 7:10 PM CDT	TSTM WND DMG	Winchester, TN	TREES DOWN THROUGHOUT WINCHESTER. TIME ESTIMATED FROM 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, 11.9 hours before the alert went out and 111 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1719 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: -90 m²/s²
0-3 km storm-relative helicity: -71 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

342 
WUUS54 KHUN 062353
SVRHUN
TNC051-103-070030-
/O.NEW.KHUN.SV.W.0053.210506T2353Z-210507T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
653 PM CDT Thu May 6 2021

The National Weather Service in Huntsville Alabama has issued a

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

* Until 730 PM CDT.

* At 652 PM CDT, severe thunderstorms were located along a line
  extending from near Estill Springs to 6 miles southwest of
  Huntland, moving east at 40 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Winchester, Decherd, Estill Springs, Cowan, Huntland, Sewanee, Tims
  Ford Lake, Anderson, Lexie Crossroads and Harmony.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across southern middle Tennessee. SEEK SHELTER NOW 
inside a sturdy structure and stay away from windows! 

If on or near Tims Ford Lake, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 3534 8603 3531 8600 3532 8598 3528 8591
      3522 8586 3499 8587 3499 8646 3513 8634
      3512 8632 3513 8631 3513 8632 3515 8633
      3515 8632 3516 8632 3536 8616
TIME...MOT...LOC 2352Z 275DEG 36KT 3532 8615 3499 8635 

HAIL...0.75IN
WIND...60MPH
 
$$

25

2 follow-up statements

784 
WWUS54 KHUN 070019
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
719 PM CDT Thu May 6 2021

TNC103-070028-
/O.CAN.KHUN.SV.W.0053.000000T0000Z-210507T0030Z/
Lincoln TN-
719 PM CDT Thu May 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LINCOLN COUNTY IS
CANCELLED...

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

LAT...LON 3531 8600 3532 8598 3528 8591 3522 8586
      3499 8587 3499 8617 3518 8608
TIME...MOT...LOC 0018Z 279DEG 34KT 3529 8582 3496 8602 

$$

TNC051-070030-
/O.CON.KHUN.SV.W.0053.000000T0000Z-210507T0030Z/
Franklin TN-
719 PM CDT Thu May 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR EASTERN FRANKLIN COUNTY...

At 718 PM CDT, severe thunderstorms were located along a line
extending from near Monteagle to 11 miles northeast of Skyline,
moving east at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Emergency management and Doppler radar.

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

Locations impacted include...
Winchester, Decherd, Cowan, Sewanee, Anderson, Alto, St. Andrews,
Sherwood and Woods Reservoir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across southern middle Tennessee. SEEK SHELTER NOW 
inside a sturdy structure and stay away from windows.
 
&&

LAT...LON 3531 8600 3532 8598 3528 8591 3522 8586
      3499 8587 3499 8617 3518 8608
TIME...MOT...LOC 0018Z 279DEG 34KT 3529 8582 3496 8602 

HAIL...<.75IN
WIND...60MPH
 
$$

25

664 
WWUS54 KHUN 070025
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
725 PM CDT Thu May 6 2021

TNC051-070035-
/O.EXP.KHUN.SV.W.0053.000000T0000Z-210507T0030Z/
Franklin TN-
725 PM CDT Thu May 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN FRANKLIN COUNTY WILL
EXPIRE AT 730 PM CDT...
    
The storms which prompted the warning are moving out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 3531 8600 3532 8598 3528 8591 3522 8586
      3499 8587 3499 8617 3518 8608
TIME...MOT...LOC 0025Z 275DEG 36KT 3529 8578 3496 8599 

$$

25

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 6:00 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lincoln, Moore	60 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.