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Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Overview

A large, high-precipitation supercell moved south across northeast Kansas over a five hour period. The supercell produced four EF-1 tornadoes, as well as several areas of straight-line winds in excess of 80 mph from the rear flank downdraft of the supercell:
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