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Observation: Portage / Placer

Location: Skookum

Date:
Observer:
Route & General Observations

Rode out Skookum to check on motorized area signage.

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)?Yes
Cracking (Shooting cracks)?Yes
Observer Comments

Many natural dry loose slides on steep slopes of surrounding peaks. Many steep banks along the river had already slid. Small steep slopes that we rode up or next to would slide or produce shooting cracks. Whoomphing further up the valley by the glacier would shake nearby alders.

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

Very little visibility at the start of the day due to snow. Weather quickly burnt off and went mostly clear and sunny. Temperature at the car before we left was 17F further up the valley by the glacier temperatures were noticeably warmer.

Snow surface

50-60cm of fresh powder from this storm. 50cm of snow closer to the road, out closer to the glacier increased to 60cm of snow. New snow fell undisturbed by wind.

Snowpack

We dug in the flats out Skookum so no data from elevations above sea level. In our pits the 50-60cm of new snow is sitting on small 1mm advanced facets. Total snow depth was 200cm, we dug down to expose the new/old snow interface. Pit 1 yielded failures at the new/old snow interface, results were CTV, CT1, and ECTP11.

Pit 2 in a nearby location yielded no results as the storm snow was not cohesive enough to act as a slab.

Photos & Video
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