Gallatin National Forest Avalanche Center
Very shallow. Not representaive to the range. CSPST 36/100, end
Triggered 3-4 large, rumbling collapses as we ascended, prompting this pit. One person's skin track already ascended. We had two large collapses while breaking trail, then had two while on the already established skin track. Instability isolated to nearby similar terrain, but significant.
New snow instabilities was the main concern.
Prior pit to this lower on slope, at top of steeper meadow had ECTNs at storm interfaces, no propagation, or obvious SH layers. Weak layer was not obvious until CT, and then ECTP 13 was a bit of a surprise. Shorter PST cut (15/100) was result of placing slab from previous test on top of the second PST, essentially doubling the load.
We dug in the crown of a recent avalanche. The slide appeared to be triggered by a falling tree. This was likely the result of very strong winds that were impacting the area.