I just saw on the Glacier National Park Facebook page that the Logan Pass Star Party is cancelled for this weekend (July 20 and July 21). According to the park posting:
We are expecting a powerful storm through northwest Montana on Friday night. The Weather Service is predicting very unfavorable conditions including up to 2 inches of rain per hour, 1-inch hail, and winds up to 60 mph. The park is also under a flash flood watch for this period. We will have regular night viewing at Apgar and St. Mary on Saturday night if skies are clear. The next Logan Pass Star Party is scheduled for August 17th.
Obviously this weather system will have an impact on day hikers as well as backpackers. To keep up-to-date on all the latest weather developments you can visit our Glacier Park weather page.
Glacier National Park Hiking