Cayoosh

Riding quality was:

OK

Snow conditions were:

• Crusty
• Powder

We rode:

• Cut blocks
• Mellow slopes
• Open trees

We stayed away from:

• Alpine slopes
• Convex slopes
• Steep slopes

The day was:

• Cloudy
• Warm

Avalanche conditions

• Slab avalanches today or yesterday.
• Rapid temperature rise to near or above 0°C or wet surface snow.

Widespread evidence of a natural avalanche cycle in the Cayoosh valley. Numerous southwest to southeast slopes between Cayoosh and Marriot slid to size 3. Several of these slides ran full track, including one that appeared to slide to ground. At roughly 11:30, we heard a very loud noise coming from the Rohr Ridge area. We think this may have been a large cornice fall, but did not see the event.

Not all alpine slopes went in this most recent natural cycle - we chose to avoid slopes with overhead hazard due to our uncertainty around cornices and the Dec 9 persistent weak layer.