Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Nashville, TN

January 25, 2021Williamson County, Tennessee

NWS Nashville, TN issued this special weather statement at Jan 25, 2021, 7:21 PM CST for Williamson County, Tennessee. It was in force for 39 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: Jan 25, 2021, 7:21 PM CST (01:21 UTC)
Expired: Jan 25, 2021, 8:00 PM CST
In force: 39 min
Issued by: NWS Nashville, TN

County Williamson County, TN

The radar

The Nashville radar (KOHX), 43 km from the middle of the area, began a volume at 01:21 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 00:00Z, 1.4 hours before the alert went out and 34 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: 548 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 654 m²/s²
0-3 km storm-relative helicity: 735 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

956 
WWUS84 KOHX 260121
SPSOHX

Special Weather Statement
National Weather Service Nashville TN
721 PM CST Mon Jan 25 2021
 
TNZ027-059-062-260200-
Rutherford TN-Williamson TN-Davidson TN-
721 PM CST Mon Jan 25 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN DAVIDSON...NORTHWESTERN
RUTHERFORD AND WILLIAMSON COUNTIES UNTIL 800 PM CST...

At 721 PM CST, Doppler radar was tracking a strong thunderstorm near
Fairview, or 14 miles southeast of Dickson, moving east at 45 mph.

Pea size hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
South Nashville, Franklin, Smyrna, Brentwood, La Vergne, 
Nolensville, Forest Hills, Oak Hill, Belle Meade, Bellevue, Antioch, 
Fairview, Berry Hill, Natchez Trace At Highway 96, Leipers Fork and 
Percy Priest Lake.

This includes the following highways...
 Interstate 40 between mile markers 182 and 184, between mile markers
192 and 198, and between mile markers 213 and 222.
 Interstate 65 between mile markers 62 and 81.
 Interstate 24 between mile markers 52 and 73.
 Interstate 840 between mile markers 7 and 16, and between mile
markers 47 and 52.

A Tornado Watch remains in effect until 100 AM CST for Middle
Tennessee.

LAT...LON 3586 8648 3585 8721 3605 8718 3605 8714
      3604 8711 3604 8706 3605 8705 3604 8704
      3608 8704 3618 8658
TIME...MOT...LOC 0121Z 258DEG 39KT 3593 8716 

$$

Shamburger

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 25, 6:14 PM CST	Special Weather Statement	OHX	Hickman, Perry	46 min
Jan 25, 6:18 PM CST	Severe Thunderstorm Warning	OHX	Cannon, Davidson, Maury, Rutherford, Williamson, Wilson	42 min
Jan 25, 6:59 PM CST	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Maury, Williamson	31 min
Jan 25, 7:51 PM CST	Areal Flood Advisory	OHX	Davidson, Dickson, Hickman, Williamson	5 hr
Jan 25, 8:18 PM CST	Special Weather Statement	OHX	Smith, Wilson	27 min
Jan 25, 8:39 PM CST	Special Weather Statement	OHX	Wilson	36 min
Jan 25, 9:10 PM CST	Areal Flood Advisory	OHX	Maury, Rutherford, Williamson, Wilson	2 hr
Jan 25, 9:21 PM CST	Special Weather Statement	OHX	Cannon, Rutherford	24 min
Jan 25, 9:28 PM CST	Special Weather Statement	OHX	Putnam	32 min
Jan 25, 9:36 PM CST	Special Weather Statement	OHX	Bedford	24 min
Jan 25, 9:55 PM CST	Special Weather Statement	OHX	Bedford, Coffee	35 min
Jan 26, 8:08 AM CST	River Flood Advisory	OHX	Montgomery, Robertson	6 hr

Nearby

Special Weather Statements in Tennessee, 2021 Every special weather statement 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.