A line of severe thunderstorms moved through Middle Tennessee on the afternoon of September 1st. A weak, brief tornado developed in Williamson County with wind damage and flash flooding reports across Middle TN.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS OHX wrote it up.
A line of severe thunderstorms moved through Middle Tennessee on the afternoon of September 1st. A weak, brief tornado developed in Williamson County with wind damage and flash flooding reports across Middle TN.
The local office's own words before the first event, 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 the first event at Sep 1, 1:42 PM CST, 1 hour 42 minutes earlier.
Area Forecast Discussion National Weather Service Nashville TN 242 PM CDT Tue Sep 1 2020 .DISCUSSION... Current radar trends indicate showers and thunderstorms will move into the west and southwest portions of the mid-state this afternoon and evening. Most of the activity is expected to remain sub-severe with wind gusts to 40mph and heavy rain, but an isolated severe storm may be possible especially west of the plateau. During the overnight hours, short-term models indicate a band of heavy rain setting up for areas north of I-40. An axis of higher precipitable water ranging from 2.0 to 2.5 inches, theta-e advection, southwesterly 850mb winds of 30-35kts, and moisture transport all peak between 06Z and 14Z. The best time for the highest rainfall rates look to be between 08Z to 12Z. HRRR depicts 1 hour rainfall amounts of an inch in some places, and it's likely rainfall totals of 2 inches or more may be possible for some localized areas by daybreak. The favored areas are north of I-40 and west of I-65 between 06Z and 12Z, with areas east of I-65 being impacted more towards daybreak and into the morning hours. GFS shows a repeat for Wednesday night with similar parameters as above, and even similar time frames. It shows this boundary a little further south, more along the I-40 corridor. So we'll see how tonight pans out to get a better handle on the chances for heavy rain and flash flooding tomorrow night. Having been in a wet pattern the last several days, soil moisture is high and intense rainfall will quickly runoff and overwhelm the smaller basins. This boundary pushes through Friday, followed by cooler and drier conditions for Saturday and Sunday. Expect highs in the low to mid 80s with overnight lows in the low 60s. Might even see some upper 50s Sunday morning. Enjoy the weekend because low shower and thunderstorm chances return on Monday and increase for Tuesday. && .AVIATION... 18Z TAF DISCUSSION. MVFR/VFR CIGs continue this afternoon. A line of TSRA with gusty winds will approach CKV in the next hour or so, reducing VIS/CIGs. More TSRA are expected to develop and push toward BNA/MQY and perhaps CSV this aft/eve. Activity may wane after 01z-02z, with some CIG improvement at BNA/MQY/CSV. After 06z-09z Wed, more SHRA/TSRA looks to develop and impact CKV/BNA/MQY. SW winds may pick up toward the end of the TAF to around 10-15 kts. && .PRELIMINARY POINT TEMPS/POPS... Nashville 74 88 73 87 71 / 40 60 40 60 30 Clarksville 73 84 72 84 68 / 70 60 70 60 30 Crossville 70 85 69 83 67 / 10 40 30 60 30 Columbia 73 88 72 88 70 / 30 40 30 50 20 Lawrenceburg 73 88 71 88 69 / 0 30 30 50 20 Waverly 73 85 72 85 69 / 70 70 50 60 30 && .OHX WATCHES/WARNINGS/ADVISORIES... NONE. && DISCUSSION......05 AVIATION........Schaper
Hazardous Weather Outlook National Weather Service Nashville TN 506 AM CDT Tue Sep 1 2020 TNZ005>011-023>034-056>066-075-077>080-093>095-021015- 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- 506 AM CDT Tue Sep 1 2020 This Hazardous Weather Outlook is for Middle Tennessee. .DAY ONE...Today and tonight. Scattered to numerous thunderstorms are expected again today, mainly during the afternoon. A few of these storms may become strong to severe, with wind gusts of 40 mph or greater and brief, localized flooding from heavy rainfall. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. 08
Special Weather Statement
National Weather Service Nashville TN
150 PM CDT Tue Sep 1 2020
TNZ005-011930-
Stewart TN-
150 PM CDT Tue Sep 1 2020
...SIGNIFICANT WEATHER ADVISORY FOR STEWART COUNTY UNTIL 230 PM
CDT...
At 149 PM CDT, Doppler radar was tracking a strong thunderstorm near
Paris Landing State Park, moving east at 25 mph.
Winds in excess of 30 mph will be possible with this storm.
Locations impacted include...
Dover and Land Between The Lakes.
LAT...LON 3647 8805 3649 8806 3651 8804 3653 8803
3660 8804 3665 8806 3666 8785 3663 8785
3664 8779 3637 8773 3636 8798 3637 8800
3639 8801 3645 8806
TIME...MOT...LOC 1849Z 253DEG 27KT 3650 8803
21Special Weather Statement
National Weather Service Nashville TN
236 PM CDT Tue Sep 1 2020
TNZ024-012015-
Humphreys TN-
236 PM CDT Tue Sep 1 2020
...SIGNIFICANT WEATHER ADVISORY FOR WESTERN HUMPHREYS COUNTY UNTIL
315 PM CDT...
At 235 PM CDT, Doppler radar was tracking a strong thunderstorm near
New Johnsonville, or near Camden, moving east at 25 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Waverly, Camden, New Johnsonville and Hurricane Mills.
This includes Interstate 40 between mile markers 136 and 147.
LAT...LON 3598 8802 3600 8800 3603 8800 3605 8799
3610 8794 3620 8773 3585 8773 3585 8795
3587 8794 3594 8793 3594 8800 3596 8802
TIME...MOT...LOC 1935Z 253DEG 22KT 3597 8802
21Special Weather Statement
National Weather Service Nashville TN
331 PM CDT Tue Sep 1 2020
TNZ024-025-057-012100-
Hickman TN-Dickson TN-Humphreys TN-
331 PM CDT Tue Sep 1 2020
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DICKSON...
SOUTHEASTERN HUMPHREYS AND NORTHERN HICKMAN COUNTIES UNTIL 400 PM
CDT...
At 330 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles east of Hurricane Mills, or 12 miles northwest of Centerville,
moving east at 30 mph.
Winds in excess of 30 mph will be possible with this storm. Frequent
lightning can also be expected.
Locations impacted include...
Dickson, Centerville, Burns, Charlotte, Bon Aqua, Pinewood, Primm
Springs, Lyles, Nunnelly and Bucksnort.
This includes Interstate 40 between mile markers 147 and 174.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3598 8777 3617 8734 3580 8723 3581 8772
3584 8772 3584 8773
TIME...MOT...LOC 2030Z 254DEG 49KT 3592 8763
21Special Weather Statement
National Weather Service Nashville TN
336 PM CDT Tue Sep 1 2020
TNZ094-095-012115-
Lawrence TN-Giles TN-
336 PM CDT Tue Sep 1 2020
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LAWRENCE AND CENTRAL
GILES COUNTIES UNTIL 415 PM CDT...
At 336 PM CDT, Doppler radar was tracking a strong thunderstorm near
Lawrenceburg, moving northeast at 40 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Lawrenceburg, Pulaski, Loretto, Minor Hill, Ethridge, Goodspring,
Leoma, Westpoint and Frankewing.
This includes Interstate 65 between mile markers 11 and 19.
LAT...LON 3513 8757 3527 8748 3538 8725 3525 8683
3517 8683 3502 8718
TIME...MOT...LOC 2036Z 247DEG 35KT 3517 8733
21Special Weather Statement
National Weather Service Nashville TN
359 PM CDT Tue Sep 1 2020
TNZ025-026-057-059-012145-
Hickman TN-Williamson TN-Dickson TN-Cheatham TN-
359 PM CDT Tue Sep 1 2020
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN DICKSON...
NORTHWESTERN WILLIAMSON...SOUTH CENTRAL CHEATHAM AND NORTHEASTERN
HICKMAN COUNTIES UNTIL 445 PM CDT...
At 359 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Centerville, moving northeast at 30 mph.
Winds in excess of 30 mph will be possible with this storm.
Locations impacted include...
Dickson, Centerville, White Bluff, Kingston Springs, Burns, Fairview,
Bon Aqua, Lyles and Nunnelly.
This includes the following highways...
Interstate 40 between mile markers 165 and 186.
Interstate 840 between mile markers 1 and 17.
LAT...LON 3595 8752 3622 8721 3585 8699 3583 8716
3585 8721 3583 8722 3580 8745
TIME...MOT...LOC 2059Z 243DEG 32KT 3590 8743
21The Nashville radar (KOHX), 69 km away, was scanning. The volume nearest the first event began at 21:22 UTC.
6 flash flood, 4 thunderstorm wind, 1 tornado. Local standard time, as filed.
Trees were blown down on North Lick Creek Road in the Primm Springs area.
Drone video footage provided by NashSevereWx, reports from emergency management, and radar data all indicated a brief EF-0 tornado touched down in far southwestern Williamson County along Green Chapel Road blowing down several trees. The tornado continued east and caused more minor tree damage on North Lick Creek Road and Bending Chestnut Road at I-840 before becoming outflow dominant straightline winds.
A Twitter tSpotter report indicated a tree was blown down in Blossom Park.
A tree was blown down on Pulltight Hill Road at Cross Keys Road.
Water reportedly covered roads around the intersection of Southwinds Drive and Kennedy Court.
Water covered the Aspen Grove Road and Jordan Road intersection as well as Rush Street.
Water covered roads around the intersection of Arno Road at Peytonsville Trinity Road.
An 18 diameter tree was blown down across the two eastbound lanes of Belinda Parkway.
The intersection of Nolensville Road and Clovercroft Road is impassable due to flooding.
A Twitter tSpotter report indicated street flooding was occurring between Sand Hill Cemetery and Smyrna Airport.
A Twitter tSpotter report indicated the Nolensville Recreational Center parking lot was under water.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2020Every state in 2020This day in weather historyThe tornado archive for Tennessee, 2020Warnings in Tennessee, September 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 921817, 921828, 921818, 921819, 921820, 921821, 921822, 921823, 921824, 921825, 921826.