An Atmospheric River is set to bring heavy rain to the coast and mountain snow to the Pacific Northwest and Northern California on Wednesday. Meanwhile, showers and thunderstorms will roll through the Lower Ohio, Tennessee, and Mississippi Valleys, bringing some heavy rain. There’s a chance of scattered flash flooding, especially in Louisiana and Mississippi. Across the central U.S. and Gulf Coast, temperatures will stay above average, while the Northeast and the West will see cooler air moving in.
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A series of Pacific storms is taking aim at the Northwest this week, delivering heavy rain, mountain snow, and gusty winds that could lead to flooding. While the West braces for more moisture, the Central and Western U.S. will bask in record-challenging warmth, with temperatures soaring 15 to 25 degrees above normal. Meanwhile, the chill that's gripped the Eastern U.S. finally begins to ease midweek, ushering in a brief break from the Arctic air. Flash freeze, snow, and wind will hit much of the Canadian Prairies, first with Alberta on Wednesday, then spreading eastward.