Alert archive / Tennessee / Tornado Warnings in 2021

Tornado Warning 16, NWS Nashville, TN

April 24, 2021Grundy County, Tennessee

NWS Nashville, TN issued this tornado warning at Apr 24, 2021, 6:02 PM CDT for Grundy County, Tennessee. It was in force for 28 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 24, 2021, 6:02 PM CDT (23:02 UTC)
Expired: Apr 24, 2021, 6:30 PM CDT
In force: 28 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Grundy County, TN

The radar

The Northeast Alabama radar (KHTX), 70 km from the middle of the area, began a volume at 23:05 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, 11.0 hours before the alert went out and 122 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: 710 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

485 
WFUS54 KOHX 242302
TOROHX
TNC061-242330-
/O.NEW.KOHX.TO.W.0016.210424T2302Z-210424T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Nashville TN
602 PM CDT Sat Apr 24 2021

The National Weather Service in Nashville has issued a

* Tornado Warning for...
  Central Grundy County in Middle Tennessee...

* Until 630 PM CDT.
    
* At 602 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Gruetli-Laager, or 17 miles west of Dunlap, moving
  east at 35 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
  central Grundy County, including the following locations...
  Altamont, Coalmont, Palmer and Beersheba Springs.

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 3532 8574 3549 8579 3553 8568 3553 8561
      3549 8554 3543 8554 3542 8551 3541 8551
      3541 8549 3539 8550 3538 8549 3536 8551
      3534 8554 3531 8557
TIME...MOT...LOC 2302Z 257DEG 20KT 3543 8569 

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

$$

21

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 3:44 PM CDT	Special Weather Statement	OHX	Bedford, Marshall	46 min
Apr 24, 4:13 PM CDT	Special Weather Statement	OHX	Cannon	47 min
Apr 24, 4:17 PM CDT	Special Weather Statement	OHX	Williamson	28 min
Apr 24, 4:28 PM CDT	Special Weather Statement	OHX	Bedford, Coffee	32 min
Apr 24, 4:47 PM CDT	Special Weather Statement	OHX	Giles	28 min
Apr 24, 5:05 PM CDT	Special Weather Statement	OHX	Coffee, Grundy, Warren	40 min
Apr 24, 5:22 PM CDT	Tornado Warning	OHX	Coffee, Grundy, Warren	23 min
Apr 24, 5:45 PM CDT	Special Weather Statement	OHX	Grundy, Van Buren	30 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.