A rare winter pattern is unfolding this week as arctic air plunges deep into the Southeast, leading to freeze warnings in Florida and snow squalls across the Northern Tier. Meanwhile, Alberta clippers will zip through the Great Lakes and Plains, bringing light snow and reinforcing the chill. After a brief midweek break, another surge of arctic cold is expected to dive into the East Coast by the weekend.
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An unusually early taste of summer is taking hold across the western U.S., with dangerous heat building through the Southwest and spreading into parts of the Plains over the next several days. While the biggest headline is the expanding heat, elevated to critical fire weather conditions will also raise concerns across the High Plains and southern Plains. Elsewhere, the Pacific Northwest stays wet for a bit longer, and the East remains stuck in a cooler, unsettled pattern with occasional rain and snow before conditions gradually settle.