Ullrs/25 Short

Two significant very large avalanche were observed on Ullr's and 25 Short. Both of these avalanches likely occured naturally around 02:00 last night during peak loading with 2"/hour and sustained winds 40 mph with gusts to 70 mph. Significant propagation on both avalanches relates to weak character of the December drought layer. The two avalanches occurences were likely related, but did not connect. These emphasize the importance of being aware of the terrain above you, especially during high danger when large natural avalanches are likely to avoid runout paths. 

8-15" of new, dense snow. Above 9000' new snow was slightly upside due to wind effect. Hand shears on new to old interface were moderate, new snow lacked cohesive character. Numerous collapses observed, with cracking on specific slopes. December drought layer varies in depth by elevation: 7500'-8500' down 18-24", 8500'-10000' down 24-40".