Any severe thunderstorms that form across northwestern Ontario could pack damaging winds, large hail, and heavy rainfall. One or two tornadoes are possible, especially around the international border from Fort Frances to just west of Thunder Bay.

Between the afternoon to evening, multiple rounds of storms will continue to hit northwestern Ontario. Heavy rain will be another threat from these storms, with concerns of localized flooding. Highway 17 and Highway 11 will see the biggest driving threats, where some areas could see up to 50 mm of rain across all of Sunday.