Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 19, NWS Nashville, TN

March 25, 20214 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Mar 25, 2021, 7:27 PM CDT for 4 counties in Tennessee. It was in force for 9 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: Mar 25, 2021, 7:27 PM CDT (00:27 UTC)
Expired: Mar 25, 2021, 7:36 PM CDT
In force: 9 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Hickman County, TN, Lewis County, TN, Maury County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 86 km from the middle of the area, began a volume at 00:26 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 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 00:00Z, 0.5 hours before the alert went out and 75 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: 290 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 615 m above ground
0-6 km bulk shear: 85 kt
0-1 km storm-relative helicity: 657 m²/s²
0-3 km storm-relative helicity: 631 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 7.4

Open this sounding in Storm Lab

The text

As transmitted.

589 
WUUS54 KOHX 260027
SVROHX
TNC081-101-119-187-260100-
/O.NEW.KOHX.SV.W.0019.210326T0027Z-210326T0100Z/

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

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Northeastern Lewis County in Middle Tennessee...
  Northern Maury County in Middle Tennessee...
  Central Williamson County in Middle Tennessee...
  Southeastern Hickman County in Middle Tennessee...

* Until 800 PM CDT.

* At 727 PM CDT, a severe thunderstorm was located 10 miles northwest
  of Mount Pleasant, or 12 miles southeast of Centerville, moving
  northeast at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Franklin, Columbia, Spring Hill, Thompson's Station, Santa Fe,
  Gordonsburg, Hampshire, Williamsport, Leipers Fork and Natchez
  Trace At Highway 96.

This includes the following highways...
 Interstate 65 between mile markers 53 and 60.
 Interstate 840 between mile markers 12 and 32.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3549 8740 3564 8752 3600 8697 3578 8678
TIME...MOT...LOC 0027Z 235DEG 49KT 3564 8734 

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

Rose

1 follow-up statement

270 
WWUS54 KOHX 260036
SVSOHX

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

TNC081-101-119-187-260046-
/O.CAN.KOHX.SV.W.0019.000000T0000Z-210326T0100Z/
Lewis TN-Maury TN-Williamson TN-Hickman TN-
736 PM CDT Thu Mar 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LEWIS...NORTHERN
MAURY...CENTRAL WILLIAMSON AND SOUTHEASTERN HICKMAN COUNTIES IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

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

LAT...LON 3549 8740 3564 8752 3600 8697 3578 8678
TIME...MOT...LOC 0034Z 235DEG 49KT 3571 8721 

$$

Rose

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 25, 7:04 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Maury, Williamson	26 min
Mar 25, 7:04 PM CDT	Tornado Warning	OHX	Lewis, Perry, Wayne	41 min
Mar 25, 7:12 PM CDT	Areal Flood Advisory	OHX	Lewis, Perry, Wayne	2 hr
Mar 25, 7:36 PM CDT	Tornado Warning	OHX	Lawrence, Lewis, Maury, Wayne	39 min
Mar 25, 7:39 PM CDT	Special Weather Statement	OHX	Trousdale, Williamson	36 min
Mar 25, 7:50 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	40 min
Mar 25, 7:52 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Williamson	38 min
Mar 25, 8:13 PM CDT	Tornado Warning	OHX	Davidson, DeKalb, Rutherford, Smith, Williamson, Wilson	32 min
Mar 25, 8:35 PM CDT	Tornado Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	25 min
Mar 25, 8:41 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Giles, Marshall, Maury, Rutherford	34 min
Mar 25, 8:41 PM CDT	Tornado Warning	OHX	Smith, Trousdale, Wilson	34 min
Mar 25, 8:49 PM CDT	Tornado Warning	OHX	Rutherford	26 min
Mar 25, 9:01 PM CDT	Tornado Warning	OHX	Jackson, Macon, Smith	14 min
Mar 25, 9:09 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Rutherford, Smith, Wilson	36 min
Mar 25, 9:40 PM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Putnam, White	35 min
Mar 25, 9:53 PM CDT	Areal Flood Advisory	OHX	Davidson	3 hr
Mar 25, 9:54 PM CDT	River Flood Advisory	OHX	Davidson	3 hr
Mar 25, 9:57 PM CDT	River Flood Advisory	OHX	Davidson	3 hr
Mar 25, 10:22 PM CDT	Special Weather Statement	OHX	Fentress, Overton, Pickett, White	38 min
Mar 25, 10:37 PM CDT	Special Weather Statement	OHX	Cumberland	38 min
Mar 25, 10:37 PM CDT	Special Weather Statement	OHX	Grundy, Van Buren	23 min
Mar 26, 5:58 PM CDT	Flash Flood Watch	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 32 more	42 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.