Northern Ontario: Thunderstorm Outlook for Tuesday, June 8, 2021

Forecast Discussion

A decaying complex of non-severe thunderstorms is expected to move into Northwestern Ontario around the Fort Francis area from Minnesota during the early morning hours on Tuesday. These storms will be slowly weakening as they track eastward along the International border through Thunder Bay and regions around Lake Superior throughout the late morning. It will likely fade out before reaching Northeastern Ontario, but the environment is favourable for storm development throughout southern parts of Northeastern Ontario such as Sault Ste. Marrie, Timmins and Sudbury during the afternoon and evening. Not all models show storms developing despite the high instability although if they do fire up, there is a questionable severe risk with the storms that develop. We may need to upgrade some areas to the isolated severe risk category if storm development is looking more likely.