Observation: Hatcher Pass

Location: Birthday and Friendship pass

Route & General Observations

Nice day. Natural avys few days old observed. Good snow on northern aspects.

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)?Yes
Observer Comments

Cracking on ridgelines in hard wind slabs. Some hollow windslabs. Natural avalanches observed, at least a few days old.

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

Light wind below ridgelines. Moderate winds on ridgelines.

Snow surface

5-10" ski penetration on northerly aspects, slightly wind effected. Slight sun effect on Southerly faces.


No formal tests. Purposefully triggered hard windslab on terrain feature on Granite mtn at 4200', 50 ft long ran 30 ft vertical.

Photos & Video
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