Southern Ontario: Thunderstorm Outlook for Friday, June 25, 2021

Forecast Discussion

Heavy rainfall with embedded non-severe thunderstorms will affect Southern Ontario throughout the day on Friday. The main concern will be the constant stream of moisture being pumped into the region especially in locations that see the embedded thunderstorms so flooding could be an issue. Rainfall totals ranging from 15-30mm are possible around Lake Huron and Georgian Bay with locally as much as 50mm by the end of Friday. More rain is expected on Saturday as the system associated with this precipitation lingers into the weekend with some potentially stronger storms east of Georgian Bay late Saturday into early Sunday morning.