Widespread showers and thunderstorms developed across Middle Tennessee during the afternoon and evening hours on September 24. A few storms became supercells, with one producing a well-defined wall cloud near Walterhill in Rutherford County, and another spawning a brief EF-0 tornado in Cannon 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.
Widespread showers and thunderstorms developed across Middle Tennessee during the afternoon and evening hours on September 24. A few storms became supercells, with one producing a well-defined wall cloud near Walterhill in Rutherford County, and another spawning a brief EF-0 tornado in Cannon County. Heavy rainfall in some areas also led to some flooding in Rutherford and De Kalb Counties.
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 24, 12:35 PM CST, 25 minutes earlier.
Area Forecast Discussion National Weather Service Nashville TN 135 PM CDT Mon Sep 24 2018 .UPDATE... FOR 18Z AVIATION DISCUSSION. && .DISCUSSION... A broad band of light to moderate rainfall continues to train over the northwestern counties this morning. This area has seen an estimated 2 to 3 inches over the last day or so. As far as areas to watch for potential flooding today, that will be the main area until this band moves east with the upper wave later this afternoon. Still expecting some thunderstorm development this afternoon especially over areas that see some sunshine and surface heating, which is still a little uncertain. The GFS keeps instability values subdued thanks to cooler surface temps, but CAMs are indicating more surface warming which would help to tap into some elevated instability. Keeping the forecast pretty much the same for now, with only minor updates to pops and hourly temperatures. && .AVIATION... 18Z TAF DISCUSSION. Scattered SHRA and TSRA will affect airports again this TAF period, mainly in the first half. Cigs/vis will vary from VFR to IFR depending on intensity of rainfall, but BNA/MQY/CKV should improve to VFR this evening. All airports will return to MVFR/IFR conditions overnight. South to southeast winds up to 11 knots are anticipated through the TAF period. && .OHX WATCHES/WARNINGS/ADVISORIES... Flash Flood Watch until 7 PM CDT this evening for Bedford-Cannon- Cheatham-Clay-Davidson-De Kalb-Dickson-Fentress-Giles-Hickman- Houston-Humphreys-Jackson-Lawrence-Lewis-Macon-Marshall-Maury- Montgomery-Overton-Perry-Pickett-Putnam-Robertson-Rutherford- Smith-Stewart-Sumner-Trousdale-Wayne-Williamson-Wilson. && DISCUSSION......11 AVIATION........Shamburger
Hazardous Weather Outlook National Weather Service Nashville TN 501 AM CDT Mon Sep 24 2018 TNZ005>011-023>034-056>066-075-077>080-093>095-251015- 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- 501 AM CDT Mon Sep 24 2018 This Hazardous Weather Outlook is for portions of Middle Tennessee. .DAY ONE...Today and Tonight A Flash Flood Watch remains in effect today for all of Middle Tennessee except parts of the Cumberland Plateau. Another 1 to 2 inches of rain can be expected today across the watch area. In addition, thunderstorms will be more numerous today, and a few of the storms could become strong, with gusty winds the primary threat, mainly in areas north of I-40. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Our rain chances will continue Tuesday and Wednesday with the passage of the next cold front. An additional 1 to 2 inches of rain is possible Tuesday through Wednesday across a broad portion of Middle Tennessee, and this will further increase our flooding potential. .SPOTTER INFORMATION STATEMENT... Spotter activation may become necessary for rainfall measurements and flooding reports today through Wednesday. Rose
The Nashville radar (KOHX), 29 km away, was scanning. The volume nearest the first event began at 19:00 UTC.
1 flood, 1 tornado, 1 flash flood. Local standard time, as filed.
The intersection of Mason Tucker Drive and Rock Springs Road in Smyrna was reportedly flooded.
A small, brief EF-0 tornado touched down on the west side of Bradyville Road just north of Lassiter Road. Moving NNE, the tornado caused significant roof damage to two homes on the west side of the roadway. Further NNE, an old barn was destroyed where three men escaped injury, and another home built in the 1890s sustained minor roof damage with several trees blown down. Several eyewitness accounts and a video posted to Youtube showed this tornado skipped along its path and was only on the ground 1-2 minutes. This is the first tornado on record to occur in the month of September in Cannon County.
Several roads were closed and impassable due to flooding in the Alexandria area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2018Every state in 2018This day in weather historyThe tornado archive for Tennessee, 2018Warnings in Tennessee, September 2018
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: 786754, 786755, 786756.