Peter Kimbell, a meteorologist with Environment Canada, is in the area to look for a clear damage path, eyewitnesses and any video of the storm that may exist.
He said the investigation could take as little as an hour and hopes to have the investigation wrapped up by Monday afternoon.
Tornadoes have been ruled out in other areas of the province that faced the storm. Peak wind gusts in Toronto were 90 km/h, with 94 km/h winds at Pearson, 96 km/h in Uxbridge, and 89 km/h in Oshawa.
The most notable damage is in the Uxbridge area, specifically Port Perry, where there were several trees down.