Observation: Park City Ridgeline

Observation Date
1/17/2016
Observer Name
mark white
Region
Salt Lake » Park City Ridgeline
Location Name or Route
PC Ridgeline
Weather
Sky
Few
Wind Direction
Southwest
Wind Speed
Moderate
Weather Comments
Warm and calm down low, moderate SE winds moving snow on the ridge line.
Snow Characteristics
New Snow Depth
4"
New Snow Density
High
Snow Surface Conditions
Dense Loose
Damp
Snow Characteristics Comments

4 inches of dense snow mixed with graupel brought storm totals to about 12 to 14 inches in the terrain covered. Damp snow on S facing around 7500ft

Red Flags
Red Flags
Wind Loading
Poor Snowpack Structure
Comments

Went up USA Bowl to take a look at Scott's and South Monitor. Scotts looked to have cornice drops but no real avalanche activity. On the other hand South Monitor looked like it had a pocket pull out most likely yesterday, right off the peak. The debris pile had been scoured off and it was evident that a slide had run in the last couple days. it looked to only run half track, most likely a cornice drop pulled out a soft slab during a period of intense wind loading. There looked to be a lot of wind loading in the main bowl with vertical wind drifts on most of the slope. We ended up skiing the south facing part of USA bowl which consisted of a spongy supportable base with 8 to 10 inches of dense creamy snow on top. But once you got out of wind affected terrain it was still upside down and inverted. The inversion was not as bad as what I was seeing in upper Cardiff Fork yesterday but there was about half as much snow on the PC Ridgeline as there was in Cardiff Fork. The ridge line was wind scoured and the old surface was exposed, no cracking or collapsing was experienced. Got a good look at a lot of terrain in Silver, Days and Cardiff and did not see one natural avalanche, also did not note any natural activity in the upper bowls of Cardiff yesterday except sluffs.

Photos: South Monitor, debris pile about 2\3 the way down the slope, suspect, looking vertical wind drifts in the skiers left side of the bowl, no need too ski suspect slopes low angle south facing was skiing well.

Considerable in high elevation wind loaded terrain

Today's Observed Danger Rating
Considerable
Tomorrows Estimated Danger Rating
Considerable