Showers and thunderstorms affected parts of southern Middle Tennessee during the afternoon and evening hours on December 29. Flooding was reported across Lawrence County.
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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.
Showers and thunderstorms affected parts of southern Middle Tennessee during the afternoon and evening hours on December 29. Flooding was reported across Lawrence County.
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 Dec 29, 4:09 PM CST, 1 hour 56 minutes earlier.
Area Forecast Discussion National Weather Service Nashville TN 409 PM CST Wed Dec 29 2021 .UPDATE... FOR EVENING DISCUSSION. && .DISCUSSION... Updated suite of forecast products to include Giles, Lawrence, and Wayne Counties in Tornado Watch 570 valid until 30/04Z(10 PM CST). Remainder of forecast continues to be on track. && .AVIATION... 18Z TAF DISCUSSION. All terminals will start VFR and will stay that way through at least 21Z, but conditions will become poor after 21Z as a low pressure system moves across the areas with showers and scattered storms followed by low clouds and areas of BR. The main time for showers and storms will be 23Z-03Z when some heavy downpours and gusty winds can be expected. After that, cigs will sink to IFR or LIFR overnight, with only slow improvement 12Z-18Z. && .OHX WATCHES/WARNINGS/ADVISORIES... NONE. && DISCUSSION......JB Wright AVIATION........13
Hazardous Weather Outlook National Weather Service Nashville TN 911 AM CST Wed Dec 29 2021 TNZ005>011-023>034-056>066-075-077>080-093>095-301515- 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- 911 AM CST Wed Dec 29 2021 This Hazardous Weather Outlook is for Middle Tennessee. .DAY ONE...Today and tonight. Severe storms will be possible between approximately 3 and 10 pm CST today, mainly south of I-40. The main concerns will be damaging straight line winds and isolated tornadoes. Localized flooding is possible across the Mid State late this afternoon and evening. 1 to 2 inches of rain will fall with locally heavier amounts. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Strong to severe storms and heavy downpours will be possible Friday night into Saturday. The details are uncertain, so please remain weather aware throughout the week. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed this evening and again Friday night into Saturday. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. 13
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Several low water crossings and other low lying areas reportedly seeing flooding across Lawrence County, including North Military Ave about 1.5 miles north of downtown Lawrenceburg, Henryville Road at Oaks Road where one vehicle was stranded, and Gwinn Road in Ethridge.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2021Every state in 2021This day in weather historyWarnings in Tennessee, December 2021
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: 999312.