Avalanche: Turnagain

Location: Sunburst

Route & General Observations

Toured up to 3800′ on Sunburst.

Avalanche Details
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Trigger NaturalRemote Trigger Unknown
Avalanche Type UnknownAspect Southwest
Elevation 3600ftSlope Angleunknown
Crown DepthunknownWidthunknown
Vertical Rununknown  
Avalanche Details

We saw a partially filled in avalanche on the SW face of Sunburst at about 3600'. This looked like it released naturally during the storm, likely on Thursday.

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

Skies were partly cloudy with light winds and temperatures in the 20s

Snow surface

Below 1000' there was an ice crust within the upper 6" of the snowpack. Above 1000' there was about 1.5' to 2' of new snow from the past few days.


At 2300' we dug a pit and found a mostly right side up snowpack with no significant results in our stability tests. Total snow depth was 130cm. There was a 2" (5cm) thick melt freeze crust about 30" (70cm) down from the surface. There was a layer of softer snow above the crust, but we did not have any snowpit results on this layer. Something to keep track of for the future.

At 3400' we dug another pit and found a similar, largely right side up snowpack. Total snow depth was 160 cm. The melt freeze crust was only about 0.5" (1-2cm) thick at this elevation and buried 30" (70cm) deep. We also found a layer of moist facets on the ground. The basal facets did not seem concerning in this location, but in an area with a thinner snowpack it might be a more concerning weak layer at higher elevations. We had no propagating snow pit tests or concerning results in this location.

Photos & Video
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