Observation: Turnagain

Location: Seattle Ridge - Weather Station Mission

Route & General Observations

Snowmachined up to Seattle Ridge to both map snow surface conditions (in anticipation of the weekend’s approaching storm) as well as replace the Seattle Ridge anemometer (wind sensor).

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Observer Comments

Large and gaping glide cracks. We did not see any new glide avalanches today.

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

Overcast skies. Easterly winds ~10mph. Temperatures in the mid 20'sF.

Snow surface

Surface hoar has grown on all aspects and elevations on Seattle Ridge. Feathers anywhere between 3mm and up to 2cm in size sit along the ridgetops and cover slopes down to the valley bottoms. The surface hoar we saw today sat on a variety of surfaces: a 1cm sun crust on Southerly aspects, hard wind slab along ridgelines and on slopes, and lastly, on very loose faceting snow in between the harder surfaces.

With a new layer of snow on the way this weekend, we are setting up for some very touchy avalanche issues.

Photos & Video
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