Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 14, NWS Nashville, TN

March 25, 2021Davidson County, Maury County, Williamson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Mar 25, 2021, 4:01 PM CDT for Davidson County, Maury County, Williamson County, Tennessee. It was in force for 29 min. 5 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: Mar 25, 2021, 4:01 PM CDT (21:01 UTC)
Expired: Mar 25, 2021, 4:30 PM CDT
In force: 29 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Davidson County, TN, Maury County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 54 km from the middle of the area, began a volume at 21:00 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
Mar 25, 4:15 PM CDT	HAIL 1	6 Wsw Leipers Fork, TN	TSPOTTER REPORT OF QUARTER SIZE HAIL IN BENDING CHESTNUT
Mar 25, 4:18 PM CDT	HAIL 0.88	6 Wsw Leipers Fork, TN	TSPOTTER REPORT FROM BENDING CHESTNUT OF HAIL.
Mar 25, 4:23 PM CDT	HAIL 1.25	1 Ne Harpeth Hills, TN	TSPOTTER REPORT OF HALF DOLLAR SIZED HAIL IN GRASSLAND
Mar 25, 4:29 PM CDT	HAIL 1	1 W Franklin, TN	1 HAIL IN WESTHAVEN.
Mar 25, 4:30 PM CDT	HAIL 1.25	Forest Hills, TN	TSPOTTER REPORT OF 1.25 INCH HAIL IN FOREST HILLS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 25, 3:48 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.0 hours before the alert went out and 42 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: 60 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 753 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 168 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

433 
WUUS54 KOHX 252101
SVROHX
TNC037-119-187-252130-
/O.NEW.KOHX.SV.W.0014.210325T2101Z-210325T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
401 PM CDT Thu Mar 25 2021

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Southwestern Davidson County in Middle Tennessee...
  Northern Maury County in Middle Tennessee...
  Williamson County in Middle Tennessee...

* Until 430 PM CDT.

* At 401 PM CDT, a severe thunderstorm was located near Columbia,
  moving northeast at 80 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Franklin, Columbia, Brentwood, Spring Hill, Nolensville, Forest
  Hills, Oak Hill, Belle Meade, Thompson's Station, Bellevue, Natchez
  Trace At Highway 96, Triune, Santa Fe, Williamsport and Leipers
  Fork.

This includes the following highways...
 Interstate 40 between mile markers 194 and 200.
 Interstate 65 between mile markers 50 and 74.
 Interstate 840 between mile markers 12 and 42.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for Middle
Tennessee.

A Tornado Watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a basement or small
interior room.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3594 8662 3591 8663 3590 8662 3586 8661
      3556 8710 3567 8728 3572 8724 3574 8723
      3615 8696
TIME...MOT...LOC 2101Z 218DEG 71KT 3569 8712 

HAIL...1.00IN
WIND...60MPH
 
$$

Rose

1 follow-up statement

996 
WWUS54 KOHX 252109
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
409 PM CDT Thu Mar 25 2021

TNC037-119-187-252130-
/O.CON.KOHX.SV.W.0014.000000T0000Z-210325T2130Z/
Davidson TN-Maury TN-Williamson TN-
409 PM CDT Thu Mar 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR SOUTHWESTERN DAVIDSON...NORTH CENTRAL MAURY AND CENTRAL
WILLIAMSON COUNTIES...

At 409 PM CDT, a severe thunderstorm was located 7 miles west of
Thompson's Station, or 12 miles southwest of Franklin, moving
northeast at 80 mph.

HAZARD...70 mph wind gusts and ping pong ball size hail.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Franklin, Columbia, Brentwood, Spring Hill, Forest Hills, Oak Hill,
Belle Meade, Thompson's Station, Bellevue, Leipers Fork and Natchez
Trace At Highway 96.

This includes the following highways...
 Interstate 40 between mile markers 196 and 200.
 Interstate 65 between mile markers 62 and 74.
 Interstate 840 between mile markers 14 and 28.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for Middle
Tennessee.

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3570 8699 3581 8717 3613 8693 3599 8670
TIME...MOT...LOC 2109Z 214DEG 68KT 3582 8703 

HAIL...1.50IN
WIND...70MPH
 
$$

Rose

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 24, 8:08 PM CDT	Flash Flood Watch	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 32 more	27 hr
Mar 25, 2:19 AM CDT	Wind Advisory	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 32 more	21 hr
Mar 25, 3:15 PM CDT	Special Weather Statement	OHX	Giles	30 min
Mar 25, 3:31 PM CDT	Special Weather Statement	OHX	Warren	29 min
Mar 25, 3:50 PM CDT	Special Weather Statement	OHX	Maury, Williamson	25 min
Mar 25, 4:04 PM CDT	Special Weather Statement	OHX	Overton, Putnam, White	26 min
Mar 25, 4:23 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Williamson, Wilson	37 min
Mar 25, 4:50 PM CDT	Severe Thunderstorm Warning	OHX	Robertson, Sumner	25 min
Mar 25, 5:05 PM CDT	Special Weather Statement	OHX	Perry	40 min
Mar 25, 5:15 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Humphreys, Perry	30 min
Mar 25, 6:40 PM CDT	Special Weather Statement	OHX	Robertson	20 min
Mar 25, 6:55 PM CDT	Special Weather Statement	OHX	Hickman	35 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.