“Avalanche conditions will become downright scary as a powerful storm impacts the area today and tonight,” the center said in ...

BOISE, Idaho (CBS2) — Due to major avalanche danger, SH-21 is closed from milepost 93.7 to 105.5, Grandjean to Banner Summit.

The Idaho Transportation Department (ITD) has closed State Highway 21 in both directions due to extreme avalanche danger. The ...

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Weather conditions have forced officials to close two sections of state highway north of Boise. They remained closed as of Tuesday. The Idaho Transportation Department announced Friday that all ...

The transportation department announced Saturday that all lanes of Idaho 21 between Grandjean and Banner Summit were closed to traffic. The 12-mile closure extends from milepost 93.7 to 105.5 ...