Avalanche: Hatcher Pass

Location: Marmot Gully 1 AKA Mile 14 slide path

Date:
Observer:
Route & General Observations

Observation via Bernard Federspiel

Contact, Location & General Observations
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Forecaster Comments

Warming temperatures have allowed for recent natural wet loose avalanches this week, but the warmth is now making it's way to the basal layers of the snowpack and allowing for full depth wet slab avalanches. Continued warm temperatures at upper elevations without good overnight freezes will allow for natural wet slabs to continue and get bigger in size. Expect natural wet slab avalanche activity to peak in the PM, between 2-8pm, but possible at any hour with very warm temperatures, especially on steep slopes with good angles of incidence to solar radiation.

A second natural wet slab avalanche was triggered early morning, between 5-8am, today by a wet loose point release on the east face of skyscraper mountain. This avalanche failed at the ground in a portion of the bed surface and ran about halfway to the parking lot, with the debris stalling out on slope.

Expect wet slabs to run far, use extra caution when traveling in the backcountry by giving slopes an extra wide berth.

Avalanche Details
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Trigger NaturalAvalanche Type Wet Slab
Aspect SoutheastElevation 3800ft
Slope AngleunknownCrown Depthunknown
WidthunknownVertical Run 2000ft
Observer Comments

Natural wet slab on Marmot at mile 14, just past Archangel Road on the way up, same slide path that closed the road in November, crown at ~3800' depth is very deep partially obscured from view on road, bed surface ground, ran within 20 feet of the road, 1700' run, happened sometime between 2-5 pm today. Some natural wet loose in the same area.

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

recent avalanches, rapid warming, lack of overnight freezing

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

Inch of new snow overnight, Warm during day

Snowpack

wet and saturated, isothermal

Photos & Video
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