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Avalanche: Chugach State Park

Location: The Drive In, Hiland Road, South Fork of Eagle River, Eagle River, Alaska

Date:
Observer:
Avalanche Details
If this is an avalanche observation, click yes below and fill in the form as best as you can. If people were involved, please provide details.
Trigger NaturalAvalanche Type Soft Slab
Aspect NorthElevation 3500ft
Slope Angle 35degCrown Depth 24in
Width 800ftVertical Run 800ft
Avalanche Details

Major natural, full depth soft slab on the Drive In, first observed at 10 AM on March 15th, 2018. The snowpack on Hiland Road continues to be very unstable, with large natural and human triggered slides expected to continue. Faceted crystals make up 50% or more of the snowpack here, and this configuration is not likely to stabilize anytime soon.

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)?Yes
Cracking (Shooting cracks)?Yes
Observer Comments

Widespread cracking and collapsing continue in this area. The only likely safe terrain may be areas that have already avalanched to the ground, but it is conceivable that even these areas could re-activate if the facets have not been completely scoured out.

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

Partly cloudy
6" of new snow in past 24 hours, new snow almost every day for the past 7 days.

Snow surface

Powder snow surface