Avalanche: Seward

Location: Lost Lake

Route & General Observations

Numerous fresh natural windslab avalanches observed on Sunday on south through east facing aspects. One propagated 500+ feet wide. Crown depth unknown but deep enough to be highly visible from a distance.

Avalanche Details
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Trigger NaturalRemote Trigger Unknown
Avalanche Type Hard SlabAspect East
Elevation 4000ftSlope Angle 40deg
Crown DepthunknownWidth 500ft
Vertical Rununknown  
Avalanche Details

The largest windslab observed occurred on E facing aspect at 4000 ft on the far east face of Mt. Ascension (Peak 5151 according to Caltopo).

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

Active wind loading from northerly winds Saturday and Sunday. Small shooting cracks in windloaded pockets on small slopes. Intentionally triggered very small wind slabs on small test slopes on loaded convexities.

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

Sunday was clear with comfortable temps in 20s. Strong winds had scoured all slopes near and above treeline. Much better riding conditions Saturday but with worse vis.

Snow surface

Wind hammered anywhere the wind touched it. Waist deep powder elsewhere.

Photos & Video
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