Observation: Summit

Location: Manitoba tree line

Date:

January 26, 2020 5:25pm

Observer:

Anonymous

Route & General Observations

Alaska Guide Collective Level 1 course. Manitoba west face to 3000’

Red Flags

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Obvious signs of instability

Recent Avalanches?	No
Collapsing (Whumphing)?	Yes
Cracking (Shooting cracks)?	No

Observer Comments

Whumpfing 3-4 meter radius at 2000’

Weather & Snow Characteristics

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Weather

Clear to partly cloudy, single digit temps, calm winds, no precipitation

Snow surface

Surface hoar to up to 1 cm, largest near tree line. Smooth powder, now tracked.

Snowpack

At 2000’ we heard whumpfing. 2 out of 12 pits had propagation down 33cm on facets.
ECT-medium

At 2500’ zero out of 8 had propagation in extended column tests.

Right side up snow pack

Photos & Video

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Looking north from Manitoba 3000’ at Wilson Ridge. Glide cracks visible.

Pit profile at 2000’ where we heard whumpfing.

Location

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