Avalanche: Hatcher Pass

Location: Two Lakes Valley

Route & General Observations

Toured up safe terrain to Two Lakes valley. As we got out of the top of the alders, LOUD whumpfing sounds every once and a while, like thunder. Felt like some collapsing at times too. Once in the valley, discontinued. Seemed to be an issue where there was some wind-affected snow. At the alders and below, snow was great. Snow above the alder line was ok, but wind affected in some spots closer to the mountains. Middle was good.

Avalanche Details
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Trigger UnknownRemote Trigger Unknown
Avalanche Type Dry Loose SnowAspect Northwest
Elevation 3100ftSlope Angle 30deg
Crown DepthunknownWidth 50ft
Vertical Run 100ft  
Avalanche Details

Small D1 observed while touring up. Not sure if this was triggered by where we turned around earlier or if we just noticed it later, but it was coming off the side of the higher peak not far from our original up-track. Conditions with loud whumpfing seemed like there was possibility of larger releases. Cross loaded slopes up higher.

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

Whumphing LOUD, like thunder.

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

Generally wind sheltered in this valley. We could see SE winds kicking up high towards the end of our tour and scraping snow off the Gov Peak/Wimp Bowl area. Vis pretty good considering. 20Fs.

Snow surface

New snow most of the way, as advertised in forecast. A little wind affected about halfway up, but generally pretty good to ski, especially in the alders and below.


No pit dug.