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Observation: Alta Ski Area

Observation Date
11/14/2014
Observer Name
mark white
Region
Salt Lake » Little Cottonwood Canyon » Alta Ski Area
Location Name or Route
Alta
Weather
Sky
Overcast
Precipitation
Light Snowfall
Wind Direction
Northwest
Wind Speed
Moderate
Weather Comments
Overcast in the late morning, light snowfall and lowering cloud deck in the afternoon. Fairly strong windspeeds swirling in the upper basin moving and drifting snow at higher elevations.
Snow Characteristics
New Snow Depth
4"
New Snow Density
Medium
Snow Surface Conditions
Dense Loose
Snow Characteristics Comments

Wind affected 4 inches of new snow on the surface, capping off 8 to 10 inches of well developed faceted snow. The wind was creating drifts up to a couple feet deep in some locations.

Red Flags
Red Flags
Wind Loading
Cracking
Poor Snowpack Structure
Avalanche Problem #1
Problem
Persistent Weak Layer
Comments

Went for a walk up at Alta today to have a look at the snow and get some exercise. Decided to head over to Baldy and have a look at the snow at 10,200ft NE facing. Quick hand pit revealed 10 to 15 inches total snow pack varying quite a bit due to the wind drifting snow in some places and scouring it in others. The layering of the snow consisted of 4 inches of medium density wind affected snow sitting on about 10 inches of well developed faceted snow and a couple inches of melt freeze crust on the dirt. Snow was fairly inverted, dense on top and loose down below, the facets made for some extremely slippery skinning on steeper terrain. I was also finding a crust at the interface between the old faceted snow and the new snow not sure if the crust was wind or heat related but my guess would be wind. Did not get any clean shears but there was not much of a slab sitting on the facets more wind and new snow could change those results in the near future. Photos wind blasting Baldy, snow pit in which you can actually see the well developed facets in the bottom 8 to 10 inches, crust at the interface of the old and new snow, cloud deck dropping in the afternoon, video of our faceted base.

Video

Hazard was low to none today, could increase tomorrow if we have continued winds loading and cross loading on slopes with old faceted snow underneath and forecasted increase in snow amounts. I would stick to low to none on slopes with no old faceted snow underlying it.

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