Avalanche: Hatcher Pass

Location: Avalanche obs- post storm - Hatcher Pass

Route & General Observations

Travelled up and around Ray Wallace, Microdot, and Independence Mine observing recent avalanches post 3/19-20 storm. Numerous recent avalanches everywhere – wet loose, dry loose, soft slabs – mostly at mid and upper elevation on slopes 35 deg and steeper, all aspects.

Contact, Location & General Observations
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Forecaster Comments

Naturals avalanches possible, Human triggered avalanches are likely on all aspects on slopes steeper than 35deg at mid and upper elevation.

Avalanche Details
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Trigger SkierRemote Trigger0
Avalanche Type Soft SlabAspect North Northwest
Elevation 4000ftSlope Angle 38deg
Crown Depth 12inWidth 60ft
Vertical Run 60ft  
Avalanche Details

Observed solo skier trigger SS-AS-R2D2-I
Estimate from a distance 60ftx60ftx 12-18" crown depth
Triggered on 2nd turn, able to ski out- uninjured.
Most likely ran on surface hoar recently buried by last weekend's new snow.

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)?No
Observer Comments

Observed over 50 avalanches today from mid-storm 3/19, post storm 3/20-21, and today 3/22. Avalanches were widespread on all aspects mostly at mid (2500'-3500') and upper (3500'+) elevation on terrain 35deg and steeper. Observed dry loose and soft slabs on leeward- NE-N-NW-W and wet loose on E-SE-S-SW-W. Most avys went naturally within last 2 days. Also observed wet loose triggering soft slabs naturally.

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

12" new snow from 3/19, 3/20.
Max temps at 3500' have ranged btwe 40-46deg the past 3 days, yikes!
Winds gusted from 20-40mph for 12+ hrs post storm SE
Temps increased from 12deg F t0 30deg F during the storm.

Snow surface

wet! rollerball central
12" new snow has consolidated into 6"

Photos & Video
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