At about 6 pm ET, radar indicated a severe thunderstorm capable of producing a tornado to the south of Kapuskasing.
That prompted environment Canada to issue a tornado warning which included the Kapuskasing, Hearst and Smooth Rock Falls area. The warning was later expanded to cover the Timmins, Cochrane and Iroquois Falls area as well.
"Environment Canada issued these warnings because the radar signature was showing signs of rotation," says Gerald Cheng, a meteorologist at The Weather Network. "There were however, no eye witness reports of funnel clouds or tornadoes."
The tornado warnings were dropped by 8 pm, but viewers of The Weather Network took to social media to send in accounts of the storm.
Lightning and dark clouds were reported in Kapuskasing, while large hail and heavy rain hammered places like Smooth Rock Falls. In some areas, damaging winds were reported as well.
Conditions are expected to improve through the day on Wednesday, but temperatures will be much cooler as the cold front moves through.
TORNADO SAFETY TIPS
If you should find yourself in close proximity to a tornado, remember to: