Northern Ontario: Thunderstorm Outlook for Wednesday, June 9, 2021

Forecast Discussion

Severe thunderstorms are expected to develop over central and western parts of Manitoba during the afternoon and evening hours of Wednesday. These storms will cross into Northwestern Ontario sometime late in the evening with the main threat being damaging wind gusts and large hail. There is also a marginal tornado risk with the storms, but it appears that the tornado risk will be highest over Manitoba in the early lifespan of the storms. The storms will continue to track eastward throughout the evening and into the overnight hours although they’ll begin to weaken and should be fully non-severe by midnight once they reach Thunder Bay and regions around Lake Superior. Non-severe thunderstorms are possible for Northeastern Ontario early in the morning on Thursday although this will be covered in Thursday’s thunderstorm outlook.