Sun bear is my summary of the last two days. Prior to the current bad weather we were traveling at higher latitudes. On Sunday we went from Engelberg to bivouac on Grassen :
hours Monday then on the top of Grasse and the Stössenfirn down to Sustlihütte , and on to Sustenpass road. All in all, to a high-altitude tour, mainly because of above 2,200 meters still very much fresh snow from last week is (obviously on the north side in particular), and one or the other is crossing glaciers. To fit the post in the weather blog, here A few clouds images. Built on several layers of moist fact, there was a lot of clouds in the sky.
was on Sunday, especially in the lower floor of the atmospheric moisture present, which transformed itself during the day in clouds:
As of late afternoon was the bivouac at 2647m in the fog, which dissolves in the course of the night slowly . Monday was especially in the middle layers lot of moisture available, these were probably the forerunners of the approaching warm front. Thanks to this cloud, it was a beautiful sunrise: 
That Föhnwolken (altocumulus lenticularis) in Central Switzerland not only occur in warm föhn winds, the Summit Panorama shows impressive. In height blew namely speedy West to northwest winds, which triggered mainly by the Sustenhorn in the middle lee waves: 
In the further course showed always nice ground cloud formations in the sky. For the triggering of lee waves, it only requires a quick wind perpendicular to a mountain and a stable stratification of the atmosphere. Is in the stable layer is additionally present sufficient moisture, then the lee wave as a stationary cloud visible 
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