Observation: Summit

Location: Tenderfoot

Route & General Observations

We toured up the Tenderfoot up track towards the ridge evaluating the impact of the recent snow cycle, melt freeze crust and potential wind effects. Dug in several elevation bands.

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?No
Collapsing (Whumphing)?No
Cracking (Shooting cracks)?Yes
Observer Comments

Shooting cracks observed at 2500' when wind textured rollover was jumped on.

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

Clear Sky
No precip
Calm to Light Winds
Temps in the upper single digits to lower teens

Snow surface

New snow and settled powder from road to high point, accumulation line sat around 1700'-2100', in which the snowpack doubled.
Above 2500' wind texture (sastrugi), soft protected pockets still existed.
A deteriorating rain runnel and melt-freeze crust just under the new snow from the road to 1800'.


Set out looking to see what the 1.5" of H20 from the last 7 days would do to the Summit area snowpack . Looking to see if a mid snowpack melt freeze, facet interface existed.
Found a weak melt-freeze crust on the ground beneath the new snow from the road to 2500', at upper elevations the melt freeze crust had 2mm facets and deteriorating rain runnels.
Above 2400' we found multiple wind compacted layers throughout the snowpack, one approx. 30" down and one 50" down in deeper snowpacks. When jumped on, the wind textured snow had propagation potential and resulted in shooting cracks.

Hand Pit #1: Tenderfoot - 1600' - NW
New snow on weak melt freeze crust

Hand Pit #2: Tenderfoot - 1800' - NW
New snow on deteriorating melt freeze crust

Pit #3: Tenderfoot - 2350' - NW - 35 degree slope - HS:65cm
CT28 down 42cm on 2mm facets
ECTN27 down 42cm on 2mm facets

Pit #4: Tenderfoot - 2550' - NW - 22 degree slope - HS: 56cm
CT8 down 25cm on .5-1mm Needles/DF
CT10 down 25cm on .5-1mm Needles/DF
ECTP26PC down 25cm on .5-1mm Needles/DF
ECTN24 down 25cm on .5-1mm Needles/DF
CT12 down 56cm on 2mm facets
CT14 down 56cm on 2mm facets

Pit #4- Tenderfoot - 2600' - N - 24 degrees- HS: 100cm
CT11 down 30cm on .5-1mm DF
CT18 down 50 cm on 1mm Melt Freeze Crust
ECTN18 down 30cm on .5-1mm DF
ECTN21 down 30cm on .5-1mm DF

Photos & Video
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