Observation: Hatcher Pass

Location: Hatcher Pass proper- near April Bowl

Route & General Observations

Travelled up from bridge to HP proper , towards April Bowl, on the summer road in stormy conditions.


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?No
Collapsing (Whumphing)?No
Cracking (Shooting cracks)?Yes
Observer Comments

Pit data SW slope 4000', W aspect of Hatcher Pass Proper (see attached)
Some cracking in new storm snow in isolated wind loaded pockets

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

S1, Winds blowing steady 15-20 mph between 1-3 pm from the W/NW. 5" new snow (0.2" water) between approx. 7am and 3 pm. 12 deg. F at 3850' at 2pm. Temps dropped from 14 deg. F to 0 deg F over 12 hours today.

Snow surface

Significant wind transport of today's new snow- about 4-5 inches as of 3 pm. (5 inches new snow at IM as of 8pm 12/28). Winds blew steady and harder in the passes than recorded all day on Marmot Wx station. Snow surface changed from light density pow to being wind sculpted in a couple hours.


HP maintains a weak, poor structure, and rotten base that is widespread. Any new load with the addition of wind will increase avy danger.
See pit and pics. Low continuity, moderate strength, poor structure, high energy.

Photos & Video
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