UPDATE, 9:30 a.m.: Reopened, for now.

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Above: The live LoCO traffic map. If the highway is still closed at the time you’re reading this, there will be a stop sign visible on 299.

Says the CHP:

The weather is continuing to beat SR-299. CHP is closing SR-299 from the Blue Lake Scales to Mile Post Marker 33 due to snow, falling trees and power lines, and disabled vehicles. We urge the motoring public to avoid the area and we will provide updates as the situation changes. Thanks for your cooperation and assistance.