Avalanche: Turnagain

Location: Tincan

Route & General Observations

Tour to 2200′ on Tincan.
APU Weather Station Maintenance.
Did a couple of laps through trees
Considerable amounts of new snow, somewhat heavy.

Avalanche Details
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Trigger SkierRemote Trigger0
Avalanche Type Soft SlabAspect West Northwest
Elevation 1800ftSlope Angleunknown
Crown Depth 6inWidth 10ft
Vertical Run 10ft  
Avalanche Details

Triggered a small storm slab on very steep small convexity within the trees, only progated ~10ft and and ran a similiar distance, about 6in deep. Didn't investigate bed surface :\

Red Flags
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Observer Comments

New snow.
Small avalanche.

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

Snow line just below ~1000'
Snowing S1/S2 throughout day
Temps hovering around freezing.
Light winds w/ moderate gusts in exposed areas, coming mostly from the East, but channelling through terrain.
Overcast/obscured skies.

Snow surface

Warm, somewhat dense, new snow accumulating throughout the day. About 20cm new snow observed around 1pm.
Sitting on variety of surfaces, NSF on nonsolar aspects, Suncrusts on solar aspects. Didn't look close enough to observe if surface hoar was present.
New snow wasn't cohesive enough for meaningful handpit results.
Shovel tap tests gave different results depending on location. Described below:
Near the base of Hamburger hill: Shovel tap test shearing about 15cm down on new snow/NSF interface requiring moderate/hard force.
Low slope angle on a SW aspect @2100': failing on facets below weak Suncrust with moderate force.
Steeper slope angle on SW aspect (test pit location): New snow shearing with easy force on stout suncrust


Test pit @2100': HS=175cm. SW aspect. 20* angle
20cm of new snow on 2cm Suncrust. Small (rounding?) facets below down to Thin crust paired with well developed facets 40cm down. MLK JR day layer found 50cm down.
CT15 SC 40cm down on facet/crust combo
ECTN19 40cm down.
MLK layer was unreactive.

Photos & Video
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