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Observation: Turnagain

Location: Tincan Common Uptrack

Date:
Observer:
Route & General Observations

AAS Pro 1 course snowpack observations tour up to 2000′ on the Tincan uptrack on a classic Turnagain storm day.

Red Flags
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Observer Comments

Surprisingly few obvious signs of instability besides significant loading.

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

Obscure skies and limited visibility with snow fall all day long. Snow rates S-1 to S2.
New snow accumulation measured at AAS intermittent snow board at Tincan meadows: HIT(4 days Sun 1500 -Fri 1600) 54 cm snow/ 59 mm H20
Temperatures hovering on both sides of freezing depending on elevation.

Snow surface

New snow all the way up, boot penetration 79cm at 2000'. No observed wind effects/loading at these lower elevations.
Some rimed forms within stellars deposited in the afternoon.

Snowpack

Spent time doing snowpack observations at 2000' next to uptrack on NW aspect.
HS 185cm.
Storm slab ~50cm with top 15cm more cohesive than the rest of the storm layer.
Layer of concern: New Year's buried surface hoar (4-6mm in size!) @ 95cm below surface, ECTP14; PST70/100 End BSH20171230.
Details in the attached Snowpilot profile.

Photos & Video
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