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Observation: Turnagain

Location: Sunburst / Magnum

Date:
Observer:
Route & General Observations

Weather:
Overcast skies
Warm temps – mid to low 30’s
Gusty Easterly winds with snow devils seen at higher elevations
Light rain to 1,500′ with light snow above

Obvious Signs of Instability:
Recent Avalanches – Yes
Collapsing – No
Cracking – No

Avalanche activity:
Two shallow, but wide propagating, slabs released naturally on the Magnum’s Northern face (~3,000′).
These appeared to have been cross-loaded by the winds overnight and ran sometime in the early morning.

Crown depth – difficult to see, possibly 10-12″
Vertical run – ~600-800′
Width – ~200-300′

Surface Conditions:
2,000′ and below: the top 4-8″ of snow is saturated and wet. Wet loose avalanche potential as this sits on
a stout melt-freeze crust.
2,000′-2,500′: Damp 4-6″ of snow from 2/11 sits on 4-6″ of dry faceted snow (poor structure)
2,500′ and above: Did not travel to this elevation but snow appears to dry out quickly with elevation.

Snowpack:
Poor structure from 2,500′ and above. 6+” of snow from 2/11 sits on 4-6″ of very weak faceted snow. The
facets sit on the Mid-Jan crust. Although the slab is relatively shallow on Sunburst, the ridge harbors more
wind loading and deeper slabs.

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