Observation: Pioneer Ridge

Observation Date
1/25/2017
Observer Name
B
Region
Salt Lake » Big Cottonwood Canyon » Pioneer Ridge
Location Name or Route
Snake Creek Canyon/Pioneer Ridge
Weather
Sky
Overcast
Precipitation
Light Snowfall
Wind Direction
Northwest
Wind Speed
Moderate
Weather Comments
Cold Temperatures not getting out of the single digets above 9500. Winds were variable due to terrain channeling, yet predominently out of the NW with High End of the Light speeds on the exposed ridgelines. On SE facing slopes in Snake Creek the winds were more SWerly. Transport was Light with periods of Moderate, depending on the time of day with stronger winds and associated transport in the pm hours. Light snowfall throughout day with Sminus1 rates. Skies were Overcast the majority of the day, yet there were fog layers lingering on the East Ridge of Sunset all day long limiting visibility.
Snow Characteristics
New Snow Depth
5"
New Snow Density
Low
Snow Surface Conditions
Powder
Snow Characteristics Comments

Another day of excellent riding in bottomless creamy powder. The northerly aspects appeared to have seen less wind settling, and they were riding deeper. Ski Pen on the southerlies was 10 inches, and on the northerlies closer to 15 inches. Very little significant wind damage. The 5 inches of new snow helped to keep the riding fast even on Low Angle terrain. Yet, by late afternoon the figid temperatures appeared to be stiffening up the to 10 cm of the snowpack, and this was keeping the riding a bit slower than earlier in the day. This may translate into the potentially Dangerous Lingering Persistent Slabs becoming a bit more stubborn and as such allowing folks to get further out on them before triggering them.

Red Flags
Red Flags
Recent Avalanches
Wind Loading
Poor Snowpack Structure
Red Flags Comments
Reactive Poor Snowpack Structure does not appear to be as prevelent in upper BCC and upper Snake Creek. Obviously the Poor Snowpack Structure seen in the outlier areas like Lambs, Millcreek and the Park City region continues to present Persistent Slab Problems. Wind Loading and Transport were observed in Upper Snake Creek.
Avalanche Problem #1
Problem
Persistent Weak Layer
Trend
Same
Problem #1 Comments

Persistent Slab issues do not appear to be a major Problem in areas traveled today, yet those reported in outlier areas indicate a worrisome propensity for propagation. Of Note: Several individuals rode very steep committing lines through seemingly rocky shallower snowpack cliff areas accessing bowls and chutes without incident. And many of these riders were impacting these slopes by getting air and subsequently landing in potentially sensitive areas.

Avalanche Problem #2
Problem
Wind Drifted Snow
Trend
Decreasing Danger
Problem #2 Comments

Small Isolated Wind Slabs on S, SE and E aspects in very steep terrain may be possible.

Danger observed in areas traveled today appeared to be Moderate; and with little change overnight the Danger should remain Moderate for Isolated WInd Slabs and lingering Persistent Slabs.

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