18-19

"Small (compared to Climax Path) but deep avalanche on south end of Climax Path east facing Woody Ridge. Appears to have stepped down into deeper layers and looks to be natural trigger. 3-4' crown, approximately 100'wide. Steep wind loaded terrain." - B. Zavorra

From the email: "Went to Red Knob, up Trail Creek at the northeast side of Ennis Lake. Between the two of us, we experienced 16 collapses on slopes above 7000 feet to the top at 8000. Did not dig any pits, stayed on slopes less than 30. One slope at about 30 collapsed and shifted down slope a few inches." - J. Riedel and A. Hjelt

A group with the MSU advanced avalanches class found multiple slab avalanches that released at various times during this week's storm. Three of the slides ran for a large portion of their slide path. One avalanche was large enough to break small trees in the slide path. Ski tracks nearby suggest this avalanche was skier-triggered. Photo: A. Schauer

A skier in Hyalite noticed an avalanche on Wheeler mountain that failed on the same slope that avalanched earlier this week. Photo: G. Antonioli

Skiers near Battle ridge found poor snow structure and experienced cracking and collapsing in the snowpack. From the email: "Throughout our tour we experienced "whoomping" and cracking, some localized and some larger. Upon further inspection, the snowpack was basically new snow (making up half of the pack) and large depth hoar (the lower half of the pack) HS 50-150 depending on wind-loading. Things were most reactive in areas where cover was thinner. Snow surface was moist on solar aspects as the afternoon progressed." - C. Pruden

A skier unintentionally triggered a slab avalanche in the northern Bridgers. The group did not notice any avalanche activity on the snowmobile ride in to the zone. They dug a pit and found poor snow structure and propagation in the new snow layer in stability tests. From the email: "About halfway up my hike I heard a wumpf and started getting carried down. I was carried about 90 yards, I got fully buried for the middle 30 yards but finally surfaced and came to a stop. My two friends were on their sleds over to the side of the face and had eyes on my the whole time. We all had the proper equipment but luckily didn’t need to use it. The crown broke about 20 yards above me, looked about 3.5 ft deep, it went across the 40 yard wide couloir and continued down and around some cliffs another 20 yards." Photo: C. Histon

Skiers in Frazier Basin found poor stability, noting multiple debris piles from recent avalanches and propagating test results (ECTP27).