Saw this avalanche near the mouth of Emigration Canyon on a northwest aspect behind some of the Condo Towers. I've never seen a slide path in the canyon before in the 5 years I've lived in it. Snow depth is around 2-3 feet on those slopes and it looks to have broke near the ground, probably 18" crown or so with a 100+ foot width. The slope angle is 40+ degrees on these slopes, so a very steep angle.

This is notable because during the winters this area is an active one for bow hunters, I've regularly seen them on these aspects hiking in the snow. The runout was around 500 feet through a few terrain traps. There's still a lot of snow on the northerly aspects below 6k feet, hikers and hunters need to be aware. Unclear what triggered this slide, possibly a large animal, we have a few herd of deer around.

Forecaster Notes: Thank you for the report- we have seen a few other animal triggered (?) slides in the foothills this winter (Big Cottonwood, Ogden). We went to look at this avalanche on February 20th. It stood out as unique and we wanted to see what the lower elevation snowpack looked like prior to the next storm. This avalanche was most likely triggered by a deer on a layer of rounding facets above a melt freeze crust. It averaged 12" deep, 18" at the deepest on a 35 degree slope. The avalanche was 30' wide and between the 2 slides ran about 300' down the slope. It was difficult to see the debris as it dispersed into the trees. I believe this was from an easterly canyon wind that cross loaded the slope. We did not go to the crown face as there were cracks above the crown and not worth the risk.

Photo 1- Upper avalanche

Photo 2- Lower avalanche

Photo 3- Snowpit

Via another homeowner -

The emigration Avy report mentions that this slide path hasn’t been observed before and I have seen it slide a number of times over the years. The “pipeline” car shuttle run West off Little Mountain summit has caught and carried a couple of different friends with one getting pummeled pretty good. Frieze (Freeze?) canyon below the old ski jump and across from the open mine has been skier triggered too. I’ve been wondering about the potential for tragedy on the hillside behind our house as well,debris stacks up 4-5’ deep at the bottom of the face kids sled on.