Tornadoes, hail, floods and severe storms recorded here between 1955 and 2026, from NOAA's Storm Events Database. Search an address to see which tornadoes came closest to it.
The part of each tornado’s path NOAA recorded in this county, 2 in all. Zoom in and the paths widen to their surveyed width.
Hover or tap a bar to see that year.
NOAA's storm database records tornadoes back to 1950 and hail and thunderstorm wind back to 1955, but floods only from 1996 on. Older floods are missing here. For those, the U.S. Geological Survey's stream gauge records and flood reports are the place to look.
The strongest tornadoes, deadliest events and biggest damage here, up to 50.
May 20, 2011 · Sweet Grass, Montana
Significant flooding occurred on creeks and streams across Sweet Grass County resulting in widespread lowland flooding and numerous county roads flooded, closing roads and resulting in significant damage. Numerous bridges also washed out. Specifically, Upper Deer, Lower Deer, Bri…
May 13, 2026 · Sweet Grass, Montana
AWOS station K6S0 Big Timber gusted to 67 mph.
May 13, 2026 · Sweet Grass, Montana
Mesonet station MTHLS Harlowton South Us-191 Mp 22.0 gusted to 62 mph.
May 13, 2026 · Sweet Grass, Montana
Mesonet station DBYM8 Derby Mountain gusted to 58 mph.
May 13, 2026 · Sweet Grass, Montana
Mesonet station AU397 Big Timber gusted to 69 mph.
July 26, 2025 · Sweet Grass, Montana
Mesonet station gw0007 near Big Timber.
June 16, 2025 · Sweet Grass, Montana
Hail report.
June 14, 2025 · Sweet Grass, Montana
One and a quarter inch hail reported.
July 25, 2024 · Sweet Grass, Montana
June 23, 2024 · Sweet Grass, Montana
June 4, 2024 · Sweet Grass, Montana
August 30, 2023 · Sweet Grass, Montana
June 7, 2023 · Sweet Grass, Montana
A thunderstorm 8 to 10 miles north/northwest of Reed Point produced heavy rainfall resulting in flash flooding that affected West White Beaver Creek. The flash flood created some log jams and took out some fencing.
June 6, 2023 · Sweet Grass, Montana
Water was reported over the roads along with an inch accumulation of pea size hail.
September 7, 2022 · Sweet Grass, Montana
August 4, 2022 · Sweet Grass, Montana
July 4, 2022 · Sweet Grass, Montana
July 3, 2022 · Sweet Grass, Montana
Minor street flooding reported by broadcast media.
July 16, 2021 · Sweet Grass, Montana
July 7, 2021 · Sweet Grass, Montana
July 7, 2021 · Sweet Grass, Montana
July 23, 2020 · Sweet Grass, Montana
July 7, 2020 · Sweet Grass, Montana
June 24, 2020 · Sweet Grass, Montana
May 19, 2020 · Sweet Grass, Montana
May 19, 2020 · Sweet Grass, Montana
August 11, 2019 · Sweet Grass, Montana
August 11, 2019 · Sweet Grass, Montana
August 11, 2019 · Sweet Grass, Montana
August 11, 2019 · Sweet Grass, Montana
August 11, 2019 · Sweet Grass, Montana
August 11, 2019 · Sweet Grass, Montana
August 10, 2019 · Sweet Grass, Montana
August 10, 2019 · Sweet Grass, Montana
June 30, 2019 · Sweet Grass, Montana
June 30, 2019 · Sweet Grass, Montana
June 30, 2019 · Sweet Grass, Montana
June 30, 2019 · Sweet Grass, Montana
July 28, 2018 · Sweet Grass, Montana
July 26, 2018 · Sweet Grass, Montana
July 2, 2018 · Sweet Grass, Montana
June 28, 2018 · Sweet Grass, Montana
June 28, 2018 · Sweet Grass, Montana
May 31, 2018 · Sweet Grass, Montana
July 16, 2016 · Sweet Grass, Montana
July 16, 2016 · Sweet Grass, Montana
July 16, 2016 · Sweet Grass, Montana
July 16, 2016 · Sweet Grass, Montana
July 16, 2016 · Sweet Grass, Montana
July 22, 2014 · Sweet Grass, Montana
Four to five large Cottonwood trees were downed.