Observation: Turnagain

Location: Up track of Cornbiscuit

Route & General Observations

Along the up track of Cornbiscuit near the top of the ridge, we got a LARGE whomp that was heard and felt by my partner 40ft behind me. See details below

We also saw an older slide that had released before the last storm on the SSW face of Cornbiscuit toward the front of the valley. Debris had about a foot of soft covering it

Encountered no other concerns. Ended up riding the southern, sunny side and it was marvelous! Blue bird day, almost no wind but still cold up high

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?Yes
Cracking (Shooting cracks)?No
Observer Comments

While on the skin track up around 2800ft, we got a VERY large whomp which was felt and heard by me partner 40ft behind me. Definitely puckered my cheeks tight. I didn’t feel like standing there to measure but slope was over 25* - aspect NNW. We were nearing a low angle bench so we lightly scurried there and dug a pit. Snow depth was around 100cm to the ground, slope 18*, NNW. Result was a ECTN21 about 60cm down on the thanksgiving crust.

I think it’s worth mentioning that when I went to pry the partially broken block from the wall, it took a couple goes before the block crumbled and fell apart above the crush layer. It seemed there was good adhesion after failure which is probably why my partner and I didn’t go for a ride.

As for avalanches. We saw nothing recent. There was an older slide that looked to have released before the last snow. Debris was covered with about a foot of soft. The slide was at the start of the southern face of Cornbisket. Looked to have broke along a steeper rock band up near the ridge. Not sure how deep or wide it was but could see exposed rocks from where it looked to released. Slide ran about 1000ft