Alert archive / Tennessee / Tornado Warnings in 2021

Tornado Warning 14, NWS Nashville, TN

April 8, 2021Fentress County, Tennessee

NWS Nashville, TN issued this tornado warning at Apr 8, 2021, 5:15 PM CDT for Fentress County, Tennessee. It was in force for 16 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 8, 2021, 5:15 PM CDT (22:15 UTC)
Expired: Apr 8, 2021, 5:31 PM CDT
In force: 16 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Fentress County, TN

The radar

The Knoxville radar (KMRX), 121 km from the middle of the area, began a volume at 22:16 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.3 hours before the alert went out and 171 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: 55 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 626 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 354 m²/s²
0-3 km storm-relative helicity: 375 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

993 
WFUS54 KOHX 082215
TOROHX
TNC049-082245-
/O.NEW.KOHX.TO.W.0014.210408T2215Z-210408T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Nashville TN
515 PM CDT Thu Apr 8 2021

The National Weather Service in Nashville has issued a

* Tornado Warning for...
  East central Fentress County in Middle Tennessee...

* Until 545 PM CDT.
    
* At 515 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 10 miles east of Jamestown, 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.

* This tornadic thunderstorm will remain over mainly rural areas of
  east central Fentress County, including the following locations...
  Allardt.

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 3639 8469 3637 8470 3637 8471 3638 8472
      3637 8473 3635 8473 3635 8474 3634 8474
      3632 8483 3639 8487 3648 8471 3643 8469
      3641 8467 3641 8466 3640 8466
TIME...MOT...LOC 2215Z 255DEG 45KT 3638 8477 

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

$$

10

1 follow-up statement

243 
WWUS54 KOHX 082231
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
531 PM CDT Thu Apr 8 2021

TNC049-082240-
/O.CAN.KOHX.TO.W.0014.000000T0000Z-210408T2245Z/
Fentress TN-
531 PM CDT Thu Apr 8 2021

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

LAT...LON 3639 8469 3637 8470 3637 8471 3638 8472
      3637 8473 3635 8473 3635 8474 3634 8474
      3632 8483 3639 8487 3648 8471 3643 8469
      3641 8467 3641 8466 3640 8466
TIME...MOT...LOC 2229Z 255DEG 45KT 3643 8453 

$$

10

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 8, 1:01 AM CDT	Special Weather Statement	OHX	Bedford, Cannon, Coffee, Macon, Rutherford, Trousdale and 1 more	44 min
Apr 8, 9:29 AM CDT	Special Weather Statement	OHX	Coffee	46 min
Apr 8, 1:32 PM CDT	Special Weather Statement	OHX	Van Buren	28 min
Apr 8, 2:07 PM CDT	Special Weather Statement	OHX	Cumberland	38 min
Apr 8, 2:11 PM CDT	Special Weather Statement	OHX	Overton	34 min
Apr 8, 3:39 PM CDT	Tornado Warning	OHX	Cumberland, Fentress	21 min
Apr 8, 4:57 PM CDT	Special Weather Statement	OHX	Fentress	33 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.