Noticed this crown today. I did not see this crown two days ago while skiing in this same zone. It makes me think it likely occurred within the last 24 hrs or so. The last day I was skiing here it was a windy day and we observed strong winds that transported snow on lee aspects of the SE winds. Trigger was natural.
Signs of Unstable Snow
Weather wise, today was a calm day that remained cold below 6000 ft. At ridge top we found calm and fairly warm conditions. Below 6000 ft we observed widespread surface hoar growth. In this zone, travel conditions consisted of a mixed bag of older and firm wind drifted snow and recycled powder. Overall, it seems like the snow is staying cold on shaded aspects below 6000 ft.
Observed Avalanche Problem #1:
Seems like the wind slab avalanche problem is becoming more stubborn. That said, the avalanche we observed made us think it is still possible to trigger a wind slab avalanche at upper elevations that were exposed to wind loading from Dec 2nd.