On Saturday (3/9) skiers observed multiple large natural avalanche crowns near Wilson Peak and Dudley creek in the northern Madison Range. They appeared to break on weak layers near the bottom of the snowpack. Photo: A. Pohl
On Saturday (3/9) skiers observed multiple large natural avalanche crowns near Wilson Peak and Dudley creek in the northern Madison Range. They appeared to break on weak layers near the bottom of the snowpack. Photo: A. Pohl
From e-mail: "The deep slab on the s face of Wilson was not an isolated incident. We observed a huge one on the east face of Wilson, in addition to numerous others in the head of both Dudley and deer, ranging from s/se to due north, all that looked to have gone sometime in the last few days."
On Saturday (3/9) skiers observed multiple large natural avalanche crowns near Wilson Peak and Dudley creek in the northern Madison Range. They appeared to break on weak layers near the bottom of the snowpack. Photo: A. Pohl
A snowmobiler saw this recent activity on Saturday 3/9/19 on Cedar Mountain near Big Sky.
A skier in Hyalite found a buried layer of near surface facets (NSF) that was reactive in stability tests and responsible for several avalanches in the Hyalite Peak area. He described this buried weak layer in an email: "It is currently down anywhere from 10-40 cms, above treeline, primarily on W-N-E aspects (not on S, there is a crust). I was hoping that yesterday’s warm temps may have helped, but things felt funky underfoot, and I got an ECTP13 (E aspect, 33 deg, 9900 ft), and bailed on my primary objective. I also observed several natural avalanches (HS-N-D2R2-I) that appeared to have failed on this layer a couple days ago, on Wind loaded N aspects above 10k. Besides this, there were no other signs of instability, no shooting cracks etc."
