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Observation: Turnagain

Location: Tincan Trees

Date:
Observer:
Route & General Observations

Normal route up Tincan to top of trees. Poor visibility and wind made travel above TL difficult.

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?No
Collapsing (Whumphing)?No
Cracking (Shooting cracks)?Yes
Observer Comments

New snow was behaving well in the morning but around 14:00 the additional accumulation, warming temps and increasing winds started to produce slab-like conditions with shooting cracks. Late in the day steep rollovers were also becoming reactive and popping out when tested.

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

Parking lot 10:30- 32 degrees, snowing, light wind.
2300'- temps in high 20's climbing to 32 degrees. Winds moderate becoming strong out of the east in the afternoon. Steady snowfall, heavy at times
Parking Lot 16:20- 33 degrees, light wet snow, moderate winds

Snow surface

parking lot AM: 4" new heavy snow
1600' AM: 5" new snow
2000' AM: 7" new snow some wind effect
2300': 8' accumulating to 10 to 12" later in day
1600' PM: 7" to 8" heavy snow

Snowpack

Hand pits in the morning did not show much reactivity with the new snow/old snow mainly because it was unconsolidated and didn't act as a slab.
Hand pits in the afternoon showed moderate shears of the storm snow on the old snow surface and poor bonding of the 2/16 snow at the inter This corresponded time wise with storm slab failures on steep rollovers.

Photos & Video
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