Southern Ontario: Thunderstorm Outlook for Saturday, August 21, 2021

Forecast Discussion

A few pop-up thunderstorms are possible throughout the day on Saturday across Eastern and Central Ontario. These storms should remain non-severe with small hail, strong wind gusts and heavy rainfall. Flooding could be an issue given how slow these storms are expected to move although it will be extremely localized. There may also be a few funnel clouds that develop during the day and while they rarely touchdown, an isolated landspout can’t be ruled out. The storm risk will come to an end late in the evening.