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Observation: Alta Periphery

Observation Date
12/25/2025
Observer Name
Kelly, Kelly
Region
Salt Lake » Little Cottonwood Canyon » Alta Periphery
Location Name or Route
Upper Little Cottonwood
Weather
Sky
Overcast
Wind Direction
Southwest
Wind Speed
Strong
Weather Comments
Overcast skies with strong southwest winds that were shaking the trees and moving some graupel around on the ridgetops.
Snow Characteristics
Snow Surface Conditions
Rain-Rime Crust
Snow Characteristics Comments

Snow surface was wind affected graupel on top of a rain crust. The rain crust was supportable in some places and breakable in others.

Photo of surface rain crust @ 9,400'

Snow Profile
Aspect
North
Elevation
9,800'
Slope Angle
30°
Comments

Isothermic ( close to 0°C snow temperatures) snow pit with a stout rain crust on the surface. Grains were showing signs of rounding. We had an extended column test with no results, but were able to get failure with hard shovel shears on the rain soaked dirty graupel layer 59cm from the ground. Stepping out of our skis in unskied terrain we were sinking to the ground through the wet snow.

Photo of rounding depth hoar near the ground.

Seemed low where we went as things stand right now. Supportable surface up in the highest elevations, breakable in the mids, and mush down in lower elevation. Isothermic where we dug and poked around.

Today's Observed Danger Rating
Low
Coordinates