A very active weather pattern is unfolding across North America this week, featuring severe thunderstorms, heavy rainfall, and flooding risks from the Plains to the Great Lakes, while record-breaking heat expands across the East Coast. Meanwhile, winter-like conditions return to the Northwest and Rockies, and critical fire weather concerns develop in the High Plains. Outside the mainland U.S., Super Typhoon Sinlaku is expected to bring dangerous conditions to the Marianas through midweek.
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An active spring pattern is setting up across the U.S. this week, bringing a mix of heavy mountain snow in the West, fire weather concerns in the Plains and Florida, and increasing thunderstorm activity from Texas to the Midwest and East. Conditions will shift quickly, with cooler air spreading east and multiple rounds of rain and storms developing into the weekend.