Observation: Alta Ski Area

Observation Date
11/13/2020
Observer Name
Champion, Meisenheimer, Nassetta
Region
Salt Lake » Little Cottonwood Canyon » Alta Ski Area
Location Name or Route
Albion to Collins - In Progress
Weather
Sky
Broken
Wind Direction
Southwest
Wind Speed
Moderate
Weather Comments
Broken skies turning into overcast by the afternoon, winds increasing throughout the day. Generally moderate with strong occasional gusts, especially at upper ridgelines. Very obvious signs of wind transport at all upper elevations. By 3 pm light snowfall had begun, s-1.
Snow Characteristics
Snow Surface Conditions
Dense Loose
Wind Crust
Snow Characteristics Comments
The surface snow conditions had drastically changed over the last 24 hours. The previously loose surface has been heavily impacted by the wind creating various layers of dense loose snow at lower elevations to a thicker wind skin at mid-elevations. At upper-elevations isolated pockets of wind-slabs have begun forming.
Photo showing the relative density change within the current snowpack.
Photo of the crown of the small wind pocket triggered.
Red Flags
Red Flags
Recent Avalanches
Wind Loading
Red Flags Comments
Visible flagging off all the upper elevation ridgelines. Transportation was obvious, as well as signs of isolated wind drifted snow avalanches.
Comments
Headed out today to check out the snow surfaces, and what the wind was doing before this next system moved into the canyons. Skinning today felt very unique, similar to skiing on faceted snow. There was the thick wind drifted snow on top of low-density new snow to the ground. Winds remained consistent and continued to increase throughout the tour. Given the increasing signs of instability during the day adding higher density snow, and increased winds will cause the avalanche danger to rise rapidly.
In areas with dense trees or rocks, it is still very easy to catch a ski, it's still early season.
Video
Video
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
High