The storm that produced an outbreak of fierce tornadoes on Sunday is way out over northeastern Canada now. A new low pressure area will be organizing in the Midwest on Thursday, but it has less time than the last storm to pull in the amounts of warmth and moisture that made the storm so strong and violent.
However, some places from Illinois to Ohio could receive more than a half-inch of rain. Once the cold front associated with the new low pressure area moves east and south, the coldest air mass so far this season will chill the Great Lakes and Northeast.
This video explains the basic trends we can expect now into the weekend.
There are timing issues concerning when the really chilly air mass will take over in the Northeast. Those issues are related to how much precipitation there will be with the cold front. In any case, it appears cold air will be well entrenched from the Great Lakes to the Northeast this Sunday. The map below shows the likely upper air pattern for later this coming weekend.
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