Observation: Hatcher Pass

Location: Wimp Bowl

Route & General Observations

Toured up to Wimp Bowl. We accessed the top of the bowl by gaining the ridge to the top of 4068. Encountered a rain crust just below fresh snow toward the top of the ridge (see attached photo) which we decided to boot pack. We descended a steep wind lip to the saddle/top of Wimp bowl to ski our first lap. Decided to ski a second lap but used the skin track going up the right side of the bowl.

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

During our two laps down and up the middle of Wimp Bowl we experienced whumphing. Slope angle was 20-21 degrees.

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

Observed new snow (approx 3 inches) from 1/15. Winds were clam today. Skies consisted of broken clouds to the south with most of Hatcher Pass being overcast until mid afternoon. Temperature midday was -10C/14F.

Snow surface

New snow (approx 3 inches).


Top (cm)
85-80 rounds
80-70 rain crust
70-45 facets 2.0 mm
45-30 rounded facets 2.5mm
30-15 rounded facets 2mm
15-0 depth hoar 2.5mm

See Attached Snow Pilot profile

Also see additional Snow Pilot profile from James Howery "4068 E Aspect" to see variation in adjacent snow pit. This pit was dug approx 40 ft to the south on the same contour and varies from what was seen in this snowpack.

Photos & Video
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