The highway closed Jan. 5 after 17 separate avalanches covered the highway with snow and debris. Transportation department crews were able to clear the road and open it for a short while, but it was closed again after three feet of heavy snow fell in the area. Several more avalanches have covered the roadway since the storm.
Tests show the snowpack is unstable.
There is more than eight feet of snow at Mores Creek Summit and five feet of snow at spots adjacent to the highway. The road is closed from the Grandjean Junction to Banner Summit.