There are a lot of mountaineering routes that go up the downwind side of a mountain. Like the CMC route on Mt. Moran in the Tetons or the Gooseneck Glacier route on Gannet Peak.
The added danger of a route like this is that weather could build up on the upwind side, out of sight and then roll in with very little warning. While camped on the CMC route, halfway up the mountain, a thunderstorm rolled in with maybe ten minutes of warning.
Are there good ways to predict incoming weather without the ability to see the clouds coming?