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Observations

Region: Turnagain
Location: Corn Biscuit
Observer:
Date:

Route & General Observations

Standard Corn Biscuit up-track through trees, then stayed north, following the valley.

Avalanche Details

Avalanche details

Trigger NaturalAvalanche Type Wet Loose SnowAspect East
Elevation 3500ftSlope AngleunknownCrown Depthunknown
WidthunknownLength 2000ft  

Observer Comments

Natural triggered point release avalanche on Seattle Ridge at 1310.

Red Flags

Obvious signs of instability

Recent Avalanches?YesCollapsing (Whumphing)?YesCracking (Shooting cracks)?No

Observer Comments

Isolated whumphing at 2,300 ft, in an area of shallow snowpack on a North aspect.

Weather

Weather

No new precipitation. Warm temperatures, little to no wind, strong sunshine all day long.

Snow Characteristics

Snow surface

Around 1cm of near surface facets on northern aspects. Southern aspect were hard, frozen crusts. On the way down to the car, we skied a western aspect. We reached the car at around 1430, and the melt-freeze crust was still very hard and frozen.

Snowpack

We were looking for observations on the deep slab problem on northern aspects. On NNE slope below Corn Biscuit, pit dug on a 28 degree slope at ~2000'. Snow depth was 195cm, with 40cm of very obvious rounding basal facets. Test results: CT13RP@40 (basal facets), CT18SC@115 (unknown layer), ECTP30SP@140 (buried surface hoar). Main layer of concern was the buried surface hoar, found 55cm from the surface of the snow.



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