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Observation: Turnagain

Location: Tincan Common Uptrack

Date:
Observer:
Route & General Observations

Alaska Pacific University Snow Science class toured to 2300′ to observe how four day old storm snow is behaving.

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
Observer Comments

We observed some recent loose snow and storm slab avalanches along CFR ridge, along Seattle Ridge and on south aspect of Tincan. It was hard to distinguish if these had happened within the last 24 hours.

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

Clear skies and calm winds all day on our tour, 9:30am - 2:30pm. Temperatures rose from frigid -3F to mid twenties. What a pleasant day in the mountains!

Snow surface

Soft surface snow conditions characterized by 15-30 cm decomposing particles with some near surface facets - except on south aspects that have a distinct suncrust at the top of the snowpack.
1-4mm surface hoar on the surface at all elevations.
No wind impacts at any elevations, nor any noticeable warming at the surface snow during our tour.
High ski quality.

Snowpack

Dug at 2250' on S/SW
HS 195cm
2cm suncrust
15-20cm decomposing snow
Layer of concern: buried surface hoar/facets @ 20cm down from top (CT6, CT13, ECTN13)
25cm of faceted "March drought" snow
"Boring" rounds below that.

Photos & Video
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