Big Trout Lake, ON F0 of July 16, 1984

Big Trout Lake - Sachigo Lake

Being one of the most northern observed tornadoes in Ontario, this rare one was spotted and reported by meteorological staff at the Big Trout Lake airport. A little after 6:30 pm while observing thunderstorm clouds building to the northwest, they noticed a funnel cloud emerging under the base of the storm. About 30 km west of the airport the funnel quickly became a beautiful column as it neared far west end of the lake. As the tornado was being reported over telecommunications, it left an 800 metre scar through the woods before emerging at the shore. Shortly thereafter, it dissipated as the supercell began weakened over the lake.

According to Environment and Climate Change Canada (2018), an F0 tornado developed near Big Trout Lake, ON at 6:45 pm local time and travelled for 800 metres. The tornado caused no fatalities, injuries or property damage.


Environment and Climate Change Canada. (2018). Canadian National Tornado Database: Verified Events (1980-2009) – Public. Retrieved from: