Observation: Summit

Location: Tenderfoot

Route & General Observations

APU Snow Science field day at Summit to observe little less reactive persistent layers. Overall, quite nice day outside with pleasant skiing.

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)?No
Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.

Overcast in the morning, clouds thinning with partial sun in the afternoon.
Temps hovering around freezing or just above.
Light snow most of the day with 1-3 cm of new accumulation on skin track when skied back to the van.
Calm winds.

Snow surface

5-10 cm of new powder on top of very supportable crust.
Some of the new precipitation was beautiful plates and capped columns!
Snow surface warming was relevant only at the lowest elevation.
We did not see any new wind impact on surface snow on our tour up to 3000'.
Skiing was surprisingly good especially in lower northerly elevations; at higher elevations dust on crust.


We dug seven pits on N & NW aspects at 2600' on slopes varying from 28-34deg. HS in pits varied from 245cm on more wind loaded zones to 85cm at a wind scoured pit location.
Overall good snow stability with no exciting test results. Tired looking buried surface hoar was found 45 cm down from the top in half of the pits. Majority of the pits were not dug to the ground so no real consensus on the status of the facets below the New Year's crust.

Photos & Video
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