Observation: Summit

Location: Tenderfoot

Route & General Observations

Up to 2900′ on Tenderfoot, and a few runs on the NW aspect.

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

Numerous small D1 loose snow slides originating around 2500-3000' in elevation were seen on neighboring peaks, on generally south and east aspects.

A recent slab avalanche was observed on Moose just north of the communications repeater on the map, with a crown ~500 yards across - depth unknown - wrapping around a gully and incorporating both West and South aspects. Estimated D2.5, running most of the slide path - see photo below.

Rollerballs - covered in a few inches of snow - were present between 2000' and 3000'.

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

Mostly cloudy throughout the day with occasional valley fog. Temperature 32-28, with a light north wind above treeline.

Snow surface

At 1500': Height of Snow (HS) 30cm. 4cm of moist powder on top, over a 6cm 1 finger hardness crust, then wet melt forms to the ground.

At 2000': HS = 40cm. 8cm of dry powder over a 3cm, pencil hard melt freeze crust. Wet melt forms to the ground.

At 2500' in a wind-protected location: HS=75cm. 15cm of dry powder over a 3cm, 1 finger hardness crust. Under that, 20cm of wet melt forms, then a 1cm melt freeze crust over moist melt forms to the ground.

Above 2500' in wind exposed areas, highly variable snowpack, with observed HS ranging from 5cm to 110+cm to 2900'. A minimum of one crust was always present, over moist or wet snow to the ground.

The crust was generally supportable for skis at all elevations. Rain runnels present below 2200'. Skied surprisingly well!

Photos & Video
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