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 active and impactful weather pattern is setting up across much of North America through next week. Multiple rounds of severe thunderstorms are expected from the eastern Canadian Prairies, U.S. Plains into the Mississippi Valley, bringing the risk of damaging winds, large hail, and tornadoes. Heavy rainfall may lead to localized flooding from the Northern Plains to the Southeast, while wildfire concerns continue across the Four Corners region. At the same time, summer heat is building, with the East experiencing its hottest temperatures of the season late this week before above-average warmth expands westward during the weekend.