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📉A significant pattern change is expected across much of the country as an Arctic Outbreak is forecast to spread from the Northern Plains to the south and east, leading to exceptionally high probabilities of below-normal temperatures expected across much of the East.🧵 ❗️The coldest air of the season to date and dangerous wind chills are likely across many areas of the Southeast. Below freezing temperatures are possible as far south as the Gulf Coast and much of the Florida Peninsula. Impacts to highly sensitive citrus crops are possible. 🚙Frozen precipitation is possible across the parts of the Southern Plains and Southeast with the potential for heavy snow extending northward to include much of Appalachians, Ohio Valley, Mid-Atlantic, Great Lakes, and Northeast, potentially leading to significant travel disruptions.