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Observation: Turnagain

Location: Lynx Drainage

Date:
Observer:
Route & General Observations

Rode into the upper areas of Lynx creek drainage to look at the snowpack in this zone that is South of Turnagain Pass. General snowpack depth was shallow, 1-2meters on average.

Red Flags
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Observer Comments

None

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

Sunny with valley fog. Calm winds in drainage and temperatures in the mid 20's F.

Snow surface

3-4" of new low density snow over hard old wind affected surfaces.

Snowpack

Lots of spatial variability in snowpack depth due to prior wind affect. Two pits:

Pit 1- 3,200', NW, HS 300cm, Hight of Pit 110cm, ECTP 11 and ECTN 12 down 8-10" on decomposing fragments (old stellars) under a pencil hard wind slab. No other weak layers found.

Pit 2- 2,800', East, HS 160cm, Hight of Pit 120cm, found BSH (assuming January 21) and facets down 40 cm. Results on this layer were CT25, ECTN22 x 2, & PST 30/100 SF. There was also a layer of 2mm facets down 80 cm. CTN, ECTX, & PST 95/100 END. The hardness was P and 1F+ top to bottom. The layer of stellars below the wind slab found in pit 1 was present down about 10-15 cm, but I no results on that layer.

Side note: We were concerned with the stability on the Eastern facing slopes on the West side of Lyny creek, which are thinner and also wind loaded from last week. Last Wednesday a large natural avalanche occurred on a similar aspect and elevation one ridge to the West.

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