Gallatin National Forest Avalanche Center

ECT column propagated after 30+ hits; removed 3/4 of the slab below the shovel, multiple extra hits from shoulder, then collapsed and propagated with boot to shovel. Very dense, hard slab above.

Crown profile of snowmobile triggered avalanche on 2/17/19. AMu-R3-D2-O. None caught. Dug in average section of 2.5-5’ deep crown.

Thick slab, bad structure. It's getting harder to impact the weak layer, but it's still capable of producing avalanches.

Soft slabs cracking 6-8” on wind loaded slopes.

Recent 1-2’ soft slab avalanches triggered on wind loaded slopes. A large natural occurred on ridgleine above this pit 1/4 mile to the north between the time we left this pit (1415) and 1530. It was on a heavily wind loaded slope,broke from a cornice fall 4-8’ deep on facets near the ground. R3D3-N-O

Surface hoar on the snow surface.

Recent avalanche on steeper part of slope.