Widespread thunderstorms are expected in southern Canada, the interior Northeast, and much of the Appalachians and Mid-Atlantic.

AccuWeather Global Weather Center – August 29, 2022 – Mother Nature has given little relief from the summery conditions for those in the Northeast this month. But now, forecasters say that a noticeable change to the weather could be on the way before the final weekend of summer.

From west to east early in the week, temperatures will be on the rise, followed by a surge of humidity. Temperatures in places from Pittsburgh and Detroit to New York City and Boston will top out in the upper 80s Monday. AccuWeather RealFeel® Temperatures are expected to sneak into the upper 90s.

"The unseasonably warm, humid air in place early this week can set the stage for a dramatic clash of air masses," explained AccuWeather Meteorologist Mary Gilbert.

While a warm and sticky situation is building in the Northeast into Monday, a cooler air mass from Canada will be working its way into the United States by way of a cold front. As the front progresses through the northern tier of the country, it will ignite severe thunderstorms from the Plains to the Midwest.

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