Avalanche: Girdwood

Location: Sunnyside and Notch Mountain

Date:
Observer:
Route & General Observations

We toured up to Sunnyside with the idea of continuing to A1 Mountain, NE ridgetop winds convinced us to stick to the CPG area.

Avalanche Details
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Trigger SkierAvalanche Type Dry Loose Snow
Aspect NorthwestElevation 2000ft
Slope AngleunknownCrown Depthunknown
Width 20ftVertical Run 20ft
Avalanche Details

Several inches of new low density snow were reactive to ski cuts at convexities on steeper slopes in isolated areas in the Sunnyside/Notch bowl. The weak layer seemed to be the new/old snow interface near the surface. The area has plenty of terrain traps and tight gullies so we were traveling carefully.
On the topic of terrain traps, several ski tracks dropped into the Sunnyside creek gully and there were several large openings dropping five or six feet down to open water. Yikes!

Red Flags
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Observer Comments

We did not see any recent avalanches, hear whumpfing or see shooting cracks, however, on steep convexities the new snow readily gave way in isolated pockets at the new/old snow interface. We were wary of terrain traps and steep rollovers into steep unsupported slopes.

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

The wind was blowing 15G20 from the NE on the Sunnyside ridge but it was calm in the bowl.
Intermittent light snow in the morning and clearing skies in the afternoon.

Snow surface

1-2" of new snow over a light but noticeable crust up to 1500'. Soft snow with no wind effect 1500'-2300'. Varying degrees of wind effect on Sunnyside from 2300' to the ridgetop.

Photos & Video
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