Avalanche: Hatcher Pass

Location: Mid and Upper elevation Observations

Route & General Observations

Toured up around Marmot, Microdot, and IM bowl. Significant warming over the past several days. Lots of new avalanche activity.

Avalanche Details
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Trigger NaturalRemote Trigger0
Avalanche Type Wet Loose SnowAspect South Southwest
Elevation 3500ftSlope Angle 35deg
Crown DepthunknownWidthunknown
Vertical Rununknown  
Avalanche Details

Observed numerous wet-loose avalanches today. Wet-loose triggering slabs, slabs triggering wet-loose, and sizeable wet-loose. See pics

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

Significant temperature increase this week. Several wet-loose avalanches triggered small slabs, slabs triggering sluffs, and small to moderate size wet-loose- mostly on SE through SW aspects. Watched wet-loose avalanches between 3-5 pm go naturally on Marmot and Microdot.

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

No new snow since 3/28,3/29.
Wind gusts SE 27 mph of 4/1, 29 mph on 4/3, 22 mph on 4/5.
37deg. F at 4500' at 4pm.
40 deg. F at 3450' at 3pm.

Snow surface

Snow surface is wet in most locations and easily forms snowballs. Rollerballs were observed on all aspects today. Old wind slabs on SE through SW aspects turning into wet slabs sitting on old persistent grains.


Hand shears show easy failure with wet surface snow , failing in mid-pack persistent slab 6-10" deep. Heavy wet snow on top of lots of weak facets!
1F surface snow-wet 0-3"
4F rounding facets 3-6"
F facets- failing mid pack 6" - ground
See pics

Photos & Video
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