Observation: Hatcher Pass

Location: Marmot Mid-Rib & Vice Presidents

Route & General Observations

Toured from Independence Lot up the Mid-Rib of Marmot and down the Nose. Back up Mid-Rib to the Marmot weather station and down Vice Presidents. Cloudless sunshine and minus temperatures with dry snow made for a good day in the mountains. New natural & human triggered avalanches were visible on multiple different aspects of the mid and upper elevations. Excellent quality snow and no wind.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?No
Cracking (Shooting cracks)?No
Observer Comments

Small to medium sized Loose Dry avalanches were observed in the mid and upper elevations on multiple different aspects. The unconsolidated dry snow is reactive on slopes steeper than 40 degrees and able to run over half the length of most slide paths. The debris is shallow and would be difficult to fully bury a person but certainly able to take you off your feet or partially cover an individual.

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.

Cold and clear with -14F to -6F degrees throughout the day. No wind!

Snow surface

Dry and soft surface snow up to 6 inches deep in most locations. Firm and shallow snow can be found on exposed ridgelines. The thin wind-skin found earlier in the week has been faceted by the recent weather and is easily broken.


Overall instability lies within the 6-8 inches of recent snow from 1/29 in steep terrain. The subsurface snowpack has remained unchanged and is still mostly stable. Faceting continues to occur and firm layers are unreactive in most locations. It is possible to trigger Loose Dry avalanches on slopes over 40 degrees in steepness.

Photos & Video
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