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Observation: Turnagain

Location: Tincan Trees and Seattle Ridge

Date:
Observer:
Route & General Observations

Went for a quick tour up Tincan
1000ft-1700ft

Signs of Instability:
Recent Avalanches: Yes, natural wet slab avalanches on Seattle ridge SSW face below tree line at 1900ft
(see Photo)
Collapsing: None Observed
Cracking None Observed

Weather:
Raining
Temps in the mid 30s F

Surface Observations:
1000-1300ft: 20cm of very wet, loose surface snow
1300ft-1700ft: 30cm of very wet loose surface snow
Very high water content surface snow up to 1700ft. 20cm ski pen and lots of roller balls and some
sloughing.

Snowpack Observations:
Dug a quick pit at 1700 ft. (See Photo)
W aspect
ECTX
Surface snow is 40cm F to 4f hardness, very wet snow. Underneath this there is 50cm of damp snow, 1f to pen hardness. The location of the early december crusts is still visible, however, they are wet and no longer harder then the overlaying slab. This is still sitting on 20cm of basal facets that are wet and F hardness. Although ECT tests did not trigger this weak layer it is still of concern because of the upside down nature of the snowpack and the weakening of the slab due to warm temperatures
and rain on snow.

Natural avalanches due to these warm temps and rain are still occurring and are releasing down to the
ground on the basal facets.

Photos & Video
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