Southern Ontario: Thunderstorm Outlook for Monday, August 23, 2021

Forecast Discussion

Another day of isolated pop-up storms are possible in parts of Southern Ontario during the day on Monday. This time the focus will be on Central and Eastern Ontario for these slow-moving storms that have the potential to produce small hail, strong wind gusts and very heavy downpours. Flooding could be an issue in some areas should a storm become nearly stationary over a particular location. The storm threat will come to an end later in the evening after the sun goes down.