Southern Ontario: Thunderstorm Outlook for Saturday, September 11, 2021

Forecast Discussion

Isolated severe storms are expected to develop through Northeastern Ontario during the afternoon on Saturday. These storms will sink southeastward by the evening and could affect regions around Georgian Bay and Lake Huron. There is some uncertainty regarding timing and the exact severity of these storms, but at this point it appears that some damaging wind gusts can’t be ruled out. The tornado risk isn’t particularly strong with this set up so we haven’t included it on the map but an isolated tornado isn’t out of the question especially for the Bruce Peninsula and up into Northeastern Ontario. The risk will come to an end later in the evening although the non-severe storms could linger into early Sunday morning.