BOISE COUNTY -- The Idaho Transportation Department closed a 12-mile stretch of Idaho 21 between the Grandjean Junction and Banner Summit for about five-and-a-half hours today.

The highway was closed at 7:30 a.m. as an avalanche safety precaution. The road was evaluated and reopened at noon.

Officials say more than a foot of snow fell on Banner Summit over the weekend. There have been no slide yet, but the avalanche risk is considerable, according to ITD forecasts.

Another foot of snow is expected to fall in that area by this evening, with the heaviest amounts coming through noon today. Winds gusts at Banner Summit are expected to top 50 mph.

This is the first closure of Avalanche Alley this season. Last year there were eight closures on that stretch of Highway 21 between Nov. 1 and March 31, totaling 21.5 days. A total of 50 slides fell on the road during that period.

Check the latest road reports before heading out.

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