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Avalanche: Other Regions

Location: Eastern Alaska Range - just East of Isabel Pass

Date:
Observer:
Route & General Observations

Location: Eastern Alaska Range – just East of Isabel Pass, see map below.

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 SkierAvalanche Type Unknown
Aspect SoutheastElevation 6100ft
Slope Angle 35degCrown Depth 10in
Width 125ftVertical Run 30ft
Avalanche Details

A skier remotely triggered a small storm slab avalanche while skiing yesterday @ 63.2324N, 145.3565W. 140 degree aspect, ~35 degree slope. The crown was ~50m wide and looked to be about 20-25cm deep, this is consistent with the depth of fresh snow from Thursday-Friday snow showers. Very low energy slide that only traveled ~30m. Not enough debris to bury someone but enough to take you off your feet. Would have been consequential if the skier were caught and was above exposure.

We had dug a pit ~100m away before skiing and had no reaction on the ECT column test. Was able to get the column to break on a rain crust ~60cm down by prying on the column. 150cm of snow at the pit site with a 33 degree slope angle and 140 degree aspect.

This was a good reminder for us how variable the Deltas can be. We suspect the slide occurred at a buried patch of surface hoar that developed during last weekends clear skies.

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

20-25cm of new snow. Light SE winds. ~15 degrees