Alert archive / Tennessee / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 149, NWS Nashville, TN

August 20, 2022Cannon County, Rutherford County, Wilson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Aug 20, 2022, 3:09 PM CDT for Cannon County, Rutherford County, Wilson County, Tennessee. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 20, 2022, 3:09 PM CDT (20:09 UTC)
Expired: Aug 20, 2022, 3:45 PM CDT
In force: 36 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Cannon County, TN, Rutherford County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 44 km from the middle of the area, began a volume at 20:09 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, 8.2 hours before the alert went out and 38 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: 1428 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 793 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 20, 1:59 PM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, Aug 20, 1:59 PM CDT, 1 hour 10 minutes before

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Hazardous weather outlook, Aug 20, 2:35 AM CDT, 12 hours 34 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
235 AM CDT Sat Aug 20 2022

TNZ005>011-023>034-056>066-075-077>080-093>095-210745-
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-
235 AM CDT Sat Aug 20 2022

This Hazardous Weather Outlook is for Middle Tennessee.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

A few strong to severe storms may be possible on Sunday. The main
threat will be straight line damaging winds.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed tomorrow. Please relay any
information about observed severe weather to the NWS while following
all local, state, and CDC guidelines.

12

In the hours before

Special weather statement, Aug 20, 11:13 AM CDT, 3 hours 56 minutes before

Special Weather Statement
National Weather Service Nashville TN
1113 AM CDT Sat Aug 20 2022

TNZ025>027-201700-
Dickson TN-Davidson TN-Cheatham TN-
1113 AM CDT Sat Aug 20 2022

...A strong thunderstorm will impact portions of northwestern
Davidson, east central Dickson and Cheatham Counties through NOON
CDT...

At 1112 AM CDT, Doppler radar was tracking a strong thunderstorm over
White Bluff, or 10 miles northeast of Dickson, moving northeast at 30
mph.

HAZARD...Winds up to 40 mph, heavy rain and lightning.

SOURCE...Radar indicated.

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

Locations impacted include...
Ashland City, Coopertown, White Bluff, Kingston Springs, Pegram,
Pleasant View, Beaman Park and Bells Bend.

This includes the following highways...
 Interstate 40 near mile marker 207.
 Interstate 24 between mile markers 29 and 31.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3637 8699 3637 8697 3638 8697 3638 8695
      3617 8680 3605 8727 3617 8733 3639 8700
TIME...MOT...LOC 1612Z 245DEG 24KT 3614 8720

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

27

Special weather statement, Aug 20, 12:51 PM CDT, 2 hours 18 minutes before

Special Weather Statement
National Weather Service Nashville TN
1251 PM CDT Sat Aug 20 2022

TNZ007-008-027-028-201830-
Robertson TN-Davidson TN-Wilson TN-Sumner TN-
1251 PM CDT Sat Aug 20 2022

...A strong thunderstorm will impact portions of northeastern
Davidson, western Sumner, northwestern Wilson and southeastern
Robertson Counties through 130 PM CDT...

At 1251 PM CDT, Doppler radar was tracking a strong thunderstorm over
Goodlettsville, or 13 miles north of Nashville, moving northeast at
30 mph.

HAZARD...Winds in excess of 30 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Gallatin, Madison, Hendersonville, Goodlettsville, White House,
Millersville, Greenbrier, Lakewood, Ridgetop, Cross Plains, Portland,
Old Hickory, Cottontown and Green Hill.

This includes Interstate 65 between mile markers 91 and 112.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3618 8673 3641 8680 3662 8652 3634 8634
TIME...MOT...LOC 1751Z 232DEG 24KT 3635 8670

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

Whitehead

Special weather statement, Aug 20, 1:19 PM CDT, 1 hour 50 minutes before

Special Weather Statement
National Weather Service Nashville TN
119 PM CDT Sat Aug 20 2022

TNZ059-201900-
Williamson TN-
119 PM CDT Sat Aug 20 2022

...A strong thunderstorm will impact portions of central Williamson
County through 200 PM CDT...

At 119 PM CDT, Doppler radar was tracking a strong thunderstorm over
Thompson's Station, or 9 miles southwest of Franklin, moving
northeast at 20 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Franklin, Brentwood, Spring Hill and Thompson's Station.

This includes the following highways...
 Interstate 65 between mile markers 56 and 70.
 Interstate 840 between mile markers 20 and 40.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3580 8663 3576 8694 3578 8693 3578 8694
      3577 8694 3577 8695 3578 8695 3578 8696
      3577 8697 3582 8704 3599 8680
TIME...MOT...LOC 1819Z 241DEG 18KT 3580 8691

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Whitehead

Special weather statement, Aug 20, 1:28 PM CDT, 1 hour 41 minutes before

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Special weather statement, Aug 20, 2:00 PM CDT, 1 hour 9 minutes before

Special Weather Statement
National Weather Service Nashville TN
200 PM CDT Sat Aug 20 2022

TNZ059-060-062-201945-
Rutherford TN-Williamson TN-Maury TN-
200 PM CDT Sat Aug 20 2022

...A strong thunderstorm will impact portions of west central
Rutherford, northeastern Maury and eastern Williamson Counties
through 245 PM CDT...

At 159 PM CDT, Doppler radar was tracking a strong thunderstorm over
Spring Hill, or 10 miles northeast of Columbia, moving northeast at
20 mph.

HAZARD...Winds in excess of 30 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Franklin, Columbia, Brentwood, Spring Hill, Nolensville, Thompson's
Station, Eagleville and Triune.

This includes the following highways...
 Interstate 65 between mile markers 48 and 66.
 Interstate 840 between mile markers 24 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3575 8706 3601 8671 3576 8655 3570 8676
      3571 8676 3571 8677 3570 8677 3570 8679
      3569 8680 3570 8681 3569 8681 3565 8694
TIME...MOT...LOC 1859Z 236DEG 17KT 3572 8691

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

Whitehead

Special weather statement, Aug 20, 2:36 PM CDT, 33 minutes before

Special Weather Statement
National Weather Service Nashville TN
236 PM CDT Sat Aug 20 2022

TNZ062-202015-
Rutherford TN-
236 PM CDT Sat Aug 20 2022

...A strong thunderstorm will impact portions of southern Rutherford
County through 315 PM CDT...

At 236 PM CDT, Doppler radar was tracking a strong thunderstorm near
Murfreesboro, moving east at 20 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Murfreesboro, Christiana and Rockvale.

This includes the following highways...
 Interstate 24 between mile markers 75 and 94.
 Interstate 840 between mile markers 47 and 52.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3569 8653 3570 8654 3570 8659 3588 8657
      3590 8616 3588 8616 3588 8617 3585 8618
      3581 8618 3579 8619 3577 8619 3577 8618
      3573 8621 3571 8621 3569 8625 3565 8624
TIME...MOT...LOC 1936Z 275DEG 17KT 3579 8649

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 11:13 AM CDT	Special Weather Statement	OHX	Cheatham	47 min
Aug 20, 12:51 PM CDT	Special Weather Statement	OHX	Sumner	39 min
Aug 20, 1:19 PM CDT	Special Weather Statement	OHX	Williamson	41 min
Aug 20, 1:28 PM CDT	Special Weather Statement	OHX	Sumner	47 min
Aug 20, 2:00 PM CDT	Special Weather Statement	OHX	Williamson	45 min
Aug 20, 2:36 PM CDT	Special Weather Statement	OHX	Rutherford	39 min
Aug 20, 3:34 PM CDT	Special Weather Statement	OHX	Cannon, DeKalb	41 min
Aug 20, 5:58 PM CDT	Areal Flood Advisory	OHX	Cumberland	2 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2022 Every severe thunderstorm warning in 2022

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.