A cold front is causing major disruptions on highways in Northern California's Sierra Nevada, leading to the closure of Interstate 80 amid whiteout conditions. Traffic is being turned around at key points due to multiple spinouts and hazardous conditions. U.S. Highway 50 is also affected, with delays noted for both directions. The National Weather Service has issued an extended winter storm warning for the Tahoe area, and travelers are advised to anticipate challenging conditions throughout the day.
I-80 eastbound traffic is being held at Alta due to multiple spins over Donner Summit, the agency wrote on Instagram.
Expect slow going in the mountains all day today, Caltrans wrote on X. There is no estimated time for reopening, the agency also said on X.
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