The Storm Prediction Center issued an enhanced risk of severe weather for portions of the Great Lakes region of the United States on September 20.
This outlook included a 10% hatched risk area for tornadoes.
A line of severe thunderstorms with numerous embedded tornadoes impacted the region that evening.
The most significant tornado that occurred that evening was a high-end EF2 that struck Morristown, Minnesota, heavily damaging or destroying multiple homes in town.
Twenty-five tornadoes touched down in Minnesota alone, making September 20, 2018 the third-most prolific tornado day in state history.

A localized but damaging outbreak of tornadoes impacted eastern Ontario and southern Quebec on the afternoon of September 21 as tornadic supercells moved through the area.
The National Capital Region of Canada incurred the most significant damage from the event.
A high-end EF3 tornado damaged or destroyed hundreds of structures and vehicles, and injured numerous people as it struck Dunrobin, Ontario and Gatineau, Quebec.
A high-end EF2 that moved through the Nepean area also caused significant damage to many homes, and downed numerous trees along its path.
Four other EF2 tornadoes were also confirmed, including one that struck Calabogie, Ontario, snapping numerous trees and destroying a garage structure.
Another EF2 damaged homes and downed many trees in the Val-des-Bois, Quebec area.
Multiple reports of hail and damaging straight-line winds were also received as a result of the storms, and 272,000 people were left without power.
A total of 37 tornadoes were confirmed as a result of this outbreak, and 31 people were injured, five critically.
The Storm Prediction Center issued an enhanced risk of severe weather for portions of the Great Lakes region of the United States on September 20. This outlook included a 10% hatched risk area for tornadoes. A line of severe thunderstorms with numerous embedded tornadoes impacted the region that evening. The most significant tornado that occurred that evening was a high-end EF2 that struck Morristown, Minnesota, heavily damaging or destroying multiple homes in town. Twenty-five tornadoes touched down in Minnesota alone, making September 20, 2018 the third-most prolific tornado day in state history.
A localized but damaging outbreak of tornadoes impacted eastern Ontario and southern Quebec on the afternoon of September 21 as tornadic supercells moved through the area. The National Capital Region of Canada incurred the most significant damage from the event. A high-end EF3 tornado damaged or destroyed hundreds of structures and vehicles, and injured numerous people as it struck Dunrobin, Ontario and Gatineau, Quebec. A high-end EF2 that moved through the Nepean area also caused significant damage to many homes, and downed numerous trees along its path. Four other EF2 tornadoes were also confirmed, including one that struck Calabogie, Ontario, snapping numerous trees and destroying a garage structure. Another EF2 damaged homes and downed many trees in the Val-des-Bois, Quebec area. Multiple reports of hail and damaging straight-line winds were also received as a result of the storms, and 272,000 people were left without power. A total of 37 tornadoes were confirmed as a result of this outbreak, and 31 people were injured, five critically.
Tornadoes of 2018