Southern Ontario: Thunderstorm Outlook for Sunday, August 22, 2021

Forecast Discussion

Another humid and hot day will lead to some pop-up storms across Southern Ontario during the day on Sunday. These storms should be non-severe for the most part, however, like Saturday we could see a flooding threat and moderate size hail with some of stronger storms. Given that, we’ve decided to add an isolated severe risk through Central and Eastern Ontario, but important to note that most of the locations in this zone won’t even see a drop of rain. Any storms that have developed will start to weaken after sunset.