Williamson County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Williamson County: 1.
2. Weak tornadoes were under-recorded before Doppler radar coverage became national in the early 1990s, so earlier decades read low. Ratings use the Fujita scale before February 2007 and the Enhanced Fujita scale after.

Storm Prediction Center severe weather database, 1950 to 2025.

Every storm within 100 miles

1. Tropical storms and hurricanes (34 kt or more, still tropical) at closest approach. Post-tropical remnants with gale-force winds are listed but not counted. Direct: track within 50 miles; near: within 100 miles. Distance is measured to the county boundary for counties and to the city centre for cities, using positions interpolated hourly between HURDAT2 fixes.

National Hurricane Center HURDAT2, 1851 to 2025.

Smoke overhead

1. A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.

NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.

Claims by ZIP code

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.

River crests

River gauges

1. Crests are the highest and the recent crests the National Weather Service lists for each river gauge in the county that has a flood stage, not every flood. Flood categories use each gauge's current flood stages; crests from before levees, dams or channel changes may not be comparable. Crests measured on an old datum are left out of the rankings.

NOAA National Water Prediction Service gauge records, retrieved October 30, 2026.

1. The Palmer Drought Severity Index is computed by NOAA each month from the county's average temperature and precipitation, relative to the county's own climate. Zero is normal; -3 or lower is severe drought and -4 or lower extreme drought. It describes the long-term balance of moisture, not water supply or crop losses.

NOAA NCEI nClimDiv county Palmer Drought Severity Index, 1895 to September 2026, issued October 6, 2026.

1. Earthquakes of magnitude 2.5 or more in the USGS Comprehensive Catalog since 1900. Within 50 miles means the epicentre lies within 50 miles of the county boundary (or inside the county).
2. Small earthquakes were under-recorded before the modern seismic networks of the 1970s and are still missed in remote areas, so early decades read low. Magnitudes are as the catalogue reports them and mix scales (moment, local and body-wave).

USGS ANSS Comprehensive Earthquake Catalog, 1900 to present, retrieved October 30, 2026.

Mapped landslides

Mapped by NASA (3).

1. Landslides mapped in the USGS compilation of landslide inventories across the United States (version 3.0, 2025), rated probable or better. The compilation joins inventories made by federal and state agencies for different purposes and areas, so the number mapped in a county reflects how closely it has been surveyed as much as how often its slopes fail. An area with few records may simply not have been mapped. Deaths are as recorded in the inventories; a slide listed in two inventories is counted once.

USGS Landslide Inventories across the United States, version 3.0, retrieved October 27, 2026.

More event types since 1996

Costliest events since 1996

1. May 2, 2010Flood$10.0 million
   National Weather Service narrative

   Nolensville road, south of Nashville, was flooded. Some cars were left abandoned. Details concerning amount of damage to cars abandoned were unknown. Also, numerous homes, numerous businesses, numerous non comercial buildings, along with several county, state, and federal roads across the county received damage due to the flood.

2. Mar 1, 2017Tornado$7.3 million
   National Weather Service narrative

   An EF-1 tornado touched down along Hillsboro Road just northwest of the city of Franklin, then moved rapidly east-northeast across the Cool Springs and Brentwood areas of northern Williamson County before lifting just west of the Davidson County line. The first evidence of damage was several trees blown down in the Monticello neighborhood on Poteat Place and Spencer Creek Road near Hillsboro Road. Two sheds were destroyed and more trees snapped and uprooted along South Berrys Chapel Road. Several more trees were blown down and an outbuilding damaged along Mallory Station Road and Jackson Lake Drive, and numerous homes suffered minor to moderate roof, siding, and chimney damage…

3. May 5, 2003Tornado$3.0 million
   National Weather Service narrative

   85 homes were damaged, 2 barns were destroyed and 5 businesses were damaged.

4. May 11, 2003Tornado$2.2 million
   National Weather Service narrative

   43 homes were damaged and 3 homes were destroyed in Williamson County by the tornado. 28 units in the Executive House condominium complex in Franklin had to be evacuated after the roof was torn away. Crews worked Sunday to free people trapped inside their homes by fallen trees on Big East Fork Rd. Most of the damage to homes was roof damage and trees falling on houses.An 84-year-old grandmother was rescued from a demolished 3-story home at 1933 Old Hillsoboro Rd. She received a fractured pelvic bone.

5. Oct 24, 2010Lightning$1.8 million
   National Weather Service narrative

   A lightning strike set fire to a house, whose original value was estimated to be near 2.45 million dollars, on Chatfield Way, resulting in a fire that initially broke through the roof and became visible from Cool Springs Boulevard before firefighters could get on the scene. This home received substantial fire damage. The home was located in Cool Springs in the Enclave at Cambridge Community.

6. Mar 27, 2021Flash Flood$1.5 million
   National Weather Service narrative

   Major flash flooding affected northern Williamson County, with many roadways flooded and closed, many homes and businesses flooded, and numerous water rescues conducted from vehicles and homes. Roads were flooded and closed and homes were flooded around Harpeth River Drive and Granny White Pike at Belle Rive Drive in Brentwood, the Fieldstone Farms and the Meadowgreen Acres subdivisions on Hillsboro Road in Franklin. A river gauge on the Little Harpeth River at Granny White Pike crested at 16.20 feet at 135 am CDT.

7. Mar 3, 2023High Wind, Williamson$1.0 million
   National Weather Service narrative

   Several hours of severe non-thunderstorm winds resulted in numerous damage reports, including downed and uprooted trees, downed powerlines, and roof and other property damage across all of Williamson County. The worst damage was reported in Franklin where a factory along Liberty Pike sustained roof damage. Damages are estimated.

8. May 3, 2020Thunderstorm Wind$703,000
   National Weather Service narrative

   Numerous trees and power lines were blown down across Williamson County. Multiple large trees were blown down 1 mile north of the Concord Road and Wilson Pike intersection, including one tree that fell onto a dog kennel.

9. May 5, 1999Thunderstorm Wind$476,000
   National Weather Service narrative

   Small trees were across the road. Some homes received damage to chimneys and roofs.

10. Sep 13, 2020Flash Flood$400,000
    National Weather Service narrative

    Major flash flooding affected the Nolensville area. Several homes, businesses, and other buildings were flooded. Some of the buildings flooded included the Williamson County Parks and Recreation Center, located at 7250 Nolensville Road, which suffered damage estimated at $321,663.47; the Mill Creek Church of Christ at 7260 Nolensville Road; and the historic Nolensville School at 7248 Nolensville Road. Numerous roads were also flooded and closed including Baronswood Drive, Kidd Road, Nolensville Road, Sunset Road, York Road, Old Clovercroft Road, Summerlyn Drive, Oldham Drive, Concord Road, Rocky Springs Road, Rocky Ford Road, Stonebrook Blvd., Dortch Lane, McFarlin Road, Fly Road,…

1. Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.

NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.

All-time high

108°F2 times, most recently Jun 30, 2012

All-time low

−22°FJan 22, 1985

Warmest night

82°F3 times, most recently Jul 14, 1954

Coldest day

2°FDec 23, 1989

Wettest day

9.45 inMay 2, 2010

Snowiest day

11.0 inFeb 25, 1894

Hottest year

2024mean 61.8°F

Coldest year

2014mean 55.2°F

Wettest year

197978.16 in

Driest year

194130.53 in

Snowiest season

19.5 in1963-64

Station Franklin Sewage Plt (USC00403280), 663 ft elevation, 2.4 miles from the population centre. Daily records from 1893 to October 22, 2026; 96.7% of days in the last 30 years are complete. Records at a single station can differ from a city’s official threaded record, which may combine several stations.

NOAA NCEI Global Historical Climatology Network Daily.

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.

Neighbouring counties

• Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
• Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
• Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
• Storm events NOAA NCEI Storm Events Database, through 2026.
• Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
• Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
• Weather records NOAA NCEI Global Historical Climatology Network Daily, station USC00403280.
• River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
• Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
• Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
• Landslides USGS Landslide Inventories across the United States, version 3.0 (2025).
• Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.

Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built October 30, 2026.