Thanks.CAIC will publish
The initial item is here: https://avalanche.state.co.us/caic/acc/acc_report.php?acc_id=731&accfm=rep
So, this avalanche at Silver Mountain Resort was a skier triggered large avalanche,
Size details, “The avalanche released about 90 feet below a corniced ridgeline on a buried layer of surface hoar. The crown face was about 2 to 3 feet deep and 300 feet wide. The avalanche ran over 900 feet downhill and about 450 feet vertically.”
I don’t recall the source, but I recall reading that there were three unintentional avalanches there that day. I think that means the avy hazard was at least Level 3, maybe Level 4 on account of there having been three avalanches. Reference here,
Tips and Advice for Avalanche Safety - Avalanche Risk Scale
From the same page, “Every modern ski resort will issue notices (bulletins) indicating the level of Avalanche Risk for each day.”
This was apparently in a more remote area of the resort, Wardner Peak.
The avalanche occurred Tuesday morning at the Silver Mountain Resort in the Idaho Panhandle. The slide follows wet, heavy snowfall in recent days that brought high avalanche danger.
I wonder what Avalanche Risk level Silver published for Wardner Peak area.