Avalanche: Hatcher Pass

Location: Idaho Peak

Route & General Observations

Third Party information shared with HPAC

Remote and sympathetic avalanche triggered on North side of Idaho Peak

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 SnowmachinerRemote Trigger0
Avalanche Type Hard SlabAspect North
Elevation 4000ftSlope Angle 36deg
Crown Depth3ftWidthunknown
Vertical Rununknown  
Avalanche Details

The reporting party indicated the two avalanches covered their tracks from earlier in the day. They did not witness the avalanches. They believe they triggered it from adjacent terrain near the base of the slope. They believe they were the only group in the area. The first avalanche (left in picture) was remotely triggered, the second avalanche (right in picture) was sympathetically triggered by the first. These avalanches appear to have failed on weak snow near the base of the snowpack, consistent with other recent human triggered and natural avalanches.

The reported depth, width, and length of the avalanche is on mtf_alaska on Instagram. We are estimating from the photographs that the first avalanche was around 200' wide, and the second was around 300' wide. The depths of these avalanches appears to have ranged from 1-3 feet deep.

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
Photos & Video
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