Dangerous weather for many - a very active winter pattern is unfolding across the U.S. Lake-effect snow continues around the Great Lakes through midweek, while dangerous Arctic cold grips much of the central and eastern states. Attention then shifts to Friday through the weekend, when a potentially high-impact winter storm could spread snow and ice from the Southern Plains into the Mid-Atlantic. Travel disruptions, power issues, and prolonged cold are all on the table. For Canada, dangerous cold, particularly for Central to Eastern Provinces. Snow squalls are possible in Alberta and Saskatchewan.
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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.