Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Nashville, TN

August 13, 2021Hickman County, Lewis County, Perry County, Tennessee

NWS Nashville, TN issued this special weather statement at Aug 13, 2021, 3:24 PM CDT for Hickman County, Lewis County, Perry County, Tennessee. It was in force for 51 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: Aug 13, 2021, 3:24 PM CDT (20:24 UTC)
Expired: Aug 13, 2021, 4:15 PM CDT
In force: 51 min
Issued by: NWS Nashville, TN
Hail: 0.00 in
Wind: 40

Counties Hickman County, TN, Lewis County, TN, Perry County, TN

The radar

The Ft Campbell radar (KHPX), 117 km from the middle of the area, began a volume at 20:25 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, 8.4 hours before the alert went out and 121 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: 1072 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 1013 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Nashville, TN wrote its last area forecast discussion before this special weather statement went out at Aug 13, 1:55 PM CDT, 1 hour 29 minutes earlier.

Area forecast discussion, Aug 13, 1:55 PM CDT, 1 hour 29 minutes before

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Hazardous weather outlook, Aug 13, 5:00 AM CDT, 10 hours 24 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
500 AM CDT Fri Aug 13 2021

TNZ005>011-023>034-056>066-075-077>080-093>095-141000-
Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Pickett-Houston-
Humphreys-Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith-Jackson-
Putnam-Overton-Fentress-Perry-Hickman-Lewis-Williamson-Maury-
Marshall-Rutherford-Cannon-De Kalb-White-Cumberland-Bedford-Coffee-
Warren-Grundy-Van Buren-Wayne-Lawrence-Giles-
500 AM CDT Fri Aug 13 2021

This Hazardous Weather Outlook is for Middle Tennessee.

.DAY ONE...Today and tonight.

Scattered thunderstorms are expected today across the mid state. Some
of these storms may produce strong wind gusts and heavy rainfall.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

08

In the hours before

Special weather statement, Aug 13, 1:20 PM CDT, 2 hours 4 minutes before

Special Weather Statement
National Weather Service Nashville TN
120 PM CDT Fri Aug 13 2021

TNZ027-059-062-131845-
Rutherford TN-Williamson TN-Davidson TN-
120 PM CDT Fri Aug 13 2021

...A strong thunderstorm will impact portions of south central
Davidson, west central Rutherford and northeastern Williamson
Counties through 145 PM CDT...

At 120 PM CDT, Doppler radar was tracking a strong thunderstorm over
Nolensville, or 10 miles east of Franklin, moving east at 5 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Smyrna, Brentwood, La Vergne and Nolensville.

This includes the following highways...
 Interstate 24 between mile markers 63 and 64.
 Interstate 840 near mile marker 48.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3586 8675 3602 8675 3602 8660 3586 8655
TIME...MOT...LOC 1820Z 268DEG 5KT 3596 8667

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

13

Special weather statement, Aug 13, 1:31 PM CDT, 1 hour 53 minutes before

Special Weather Statement
National Weather Service Nashville TN
131 PM CDT Fri Aug 13 2021

TNZ028-131900-
Wilson TN-
131 PM CDT Fri Aug 13 2021

...A strong thunderstorm will impact portions of southeastern Wilson
County through 200 PM CDT...

At 131 PM CDT, Doppler radar was tracking a strong thunderstorm near
Watertown, or 12 miles southeast of Lebanon, moving east at 10 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Watertown.

This includes Interstate 40 between mile markers 247 and 250.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3619 8610 3615 8608 3599 8605 3598 8628
      3612 8633
TIME...MOT...LOC 1831Z 256DEG 8KT 3606 8622

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

13

Special weather statement, Aug 13, 1:40 PM CDT, 1 hour 44 minutes before

Special Weather Statement
National Weather Service Nashville TN
140 PM CDT Fri Aug 13 2021

TNZ059-131930-
Williamson TN-
140 PM CDT Fri Aug 13 2021

...A strong thunderstorm will impact portions of central Williamson
County through 230 PM CDT...

At 139 PM CDT, Doppler radar was tracking strong thunderstorm near
Franklin, moving east at 10 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Franklin, Brentwood, Spring Hill, Nolensville, Thompson's Station,
Leipers Fork and Natchez Trace At Highway 96.

This includes the following highways...
 Interstate 65 between mile markers 57 and 71.
 Interstate 840 between mile markers 12 and 19, and between mile
markers 21 and 39.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3600 8670 3598 8666 3576 8673 3585 8720
      3601 8699
TIME...MOT...LOC 1839Z 256DEG 8KT 3589 8689

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

13

Local storm report, Aug 13, 2:23 PM CDT, 1 hour 1 minute before

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Local storm report, Aug 13, 2:58 PM CDT, 26 minutes before

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Special weather statement, Aug 13, 3:24 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 12:16 PM CDT	Special Weather Statement	OHX	Marshall	44 min
Aug 13, 12:37 PM CDT	Special Weather Statement	OHX	Giles	53 min
Aug 13, 12:57 PM CDT	Special Weather Statement	OHX	Rutherford	48 min
Aug 13, 1:05 PM CDT	Severe Thunderstorm Warning	OHX	Rutherford	25 min
Aug 13, 1:20 PM CDT	Special Weather Statement	OHX	Williamson	25 min
Aug 13, 1:31 PM CDT	Special Weather Statement	OHX	Wilson	29 min
Aug 13, 1:40 PM CDT	Special Weather Statement	OHX	Williamson	50 min
Aug 13, 2:03 PM CDT	Areal Flood Advisory	OHX	Williamson	117 min
Aug 13, 2:38 PM CDT	Areal Flood Advisory	OHX	Lawrence, Wayne	2 hr
Aug 13, 2:47 PM CDT	Areal Flood Advisory	OHX	Davidson	118 min
Aug 13, 2:51 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Williamson	39 min
Aug 13, 2:53 PM CDT	Areal Flood Advisory	OHX	Hickman, Humphreys, Perry	2 hr
Aug 13, 2:56 PM CDT	Areal Flood Advisory	OHX	Dickson, Hickman, Williamson	2 hr
Aug 13, 3:28 PM CDT	Flash Flood Warning	OHX	Hickman, Humphreys, Perry	2 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.