As Thanksgiving week kicks off, a powerful storm system is sweeping coast to coast with major impacts. Heavy snow, gusty winds, and lake-effect snow are creating travel headaches across the northern Plains, Upper Midwest, and Great Lakes, while the Deep South and Southeast contend with rounds of heavy rain and severe thunderstorms. Behind it all, a sharp drop in temperatures spreads into much of the central and eastern U.S. by Thanksgiving Day, setting the stage for a cold holiday weekend.
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A highly active weather pattern is setting up across the southern and central United States this week. The biggest concern is a prolonged flooding threat from South Texas through Louisiana and into portions of the Lower Mississippi Valley, where repeated rounds of tropical downpours could produce significant flash flooding. Meanwhile, a powerful storm system will bring the risk of severe thunderstorms from the Midwest into the Great Lakes and Ohio Valley on Wednesday, with damaging winds, large hail, and a few tornadoes possible. While heat eases somewhat across the West, temperatures will remain above average in parts of the Pacific Northwest and California before additional cooling arrives later this week.