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Aside from the usual thunderstorm threat, expect major downpours.

Storms target northwestern Ontario

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Daniel Martins
Digital Reporter

Saturday, August 23, 2014, 8:30 AM - There aren't any major storms in the cards in southern Ontario Saturday, but it's a very different story in the northwest, where potentially severe storms are possible this weekend.

"Most of southern Ontario will see sun and cloud, but we can't rule out some brief isolated showers today with a weak upper level trough," Weather Network meteorologist Kelly Sonnenburg said early Saturday.

Although temperatures will be more or less seasonal, the same humidity that has led to fog and high dewpoints in many southern communities will also make it feel like the low 30s.

In the north, there's a chance the show could start early, with thunderstorm risk expected in the afternoon and evening with a trailing cold front, although any storms that do pop up aren't expected to be severe.

The biggest severe weather risk will come courtesy of a system advancing into the region from the United States. That will spark storms through the overnight into Sunday.

"At this point, models are suggesting high parameters for seeing severe storms through southern Manitoba and northwestern Ontario Sunday afternoon," Sonnenburg says. "This will depend on how much clearing Sunday afternoon sees and how the pre-dawn storms pan out."

Heavy rain is associated with this weekend's storms, with more than 100 mm of rain possible in some areas from Saturday through Monday.

TUNE IN: Watch the Weather Network on TV for updates on these storms. If it's safe to do so, upload your pictures and videos here.

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