A powerful holiday-week storm pattern will bring impactful weather to several parts of the U.S. through the weekend. California will see another round of atmospheric river-fueled rain, with significant flooding in lower elevations and several feet of snow in the Sierra Nevada. Meanwhile, wintry precipitation could complicate travel across the Great Lakes, Mid-Atlantic, and New England, while the central Plains and parts of the South experience unseasonable warmth and fire weather conditions. Ongoing cold for much of Western and Central Canada, particularly Alberta.
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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.