The cross-country storm carrying severe weather to millions in the Central U.S . on Saturday is set to stretch into the Northeast Sunday, bringing heavy rain and potential flash flooding.

By Sunday, the storm, driven by a large dip in the jet stream, will be centered around the Great Lakes. Ahead of it, warm temperatures and abundant moisture will return to the region.

A level 1 of 4 flash flood risk is already in place for western Pennsylvania , West Virginia and Ohio from Sunday night into Monday.

SEVERE WEATHER TARGETS OVER 50 MILLION WITH THREATS OF TORNADOES, DAMAGING WIND SATURDAY

Rain is expected to stream into the Northeast by Sunday afternoon, with areas like Buffalo , New York and Pittsburgh seeing moderate rainfall as the weekend comes to a close.

As the system moves eastwa

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