Observation: Summit

Location: Tenderfoot

Route & General Observations

Tenderfoot to 3500′

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

One small collapse at 2500', suspect layer facets under an old wind slab.

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

recent accumulation:
rain @ 1,400
trace @ 2,500
1-2” @ 3,500

Temps: 1130: 41F @ 1,400’
1400: 39 F @ 1,400’

Light South winds w/ gusts to 15 mph along ridgetop
Overcast with patches of blue sky

Snow surface

1400' - 3" patches of melt/freeze crust on grass
1600' -2000' - trace of new snow on breakable melt/freeze crust
2000' - 3000' - 1.5" of new snow on supportable melt/freeze crust
3500' - 1.5" of new snow on firm old snow


Felt an isolated collapse at 2500 a SW aspect. Dug a quick pit at this location and the snowpack was shallow and showed multiple layers of melt/freeze with faceting snow between. The collapse was most likely under an old windslab in the top 20cm. Concern was minimal due to the stout supportable surface crust. See photo diagram.

Profile of a pit @ 3,400’ S aspect just below Tenderfoot Ridge. No test results recorded as it was necessary to cut through two different crusts to isolate a column. A series of thin wind slabs, crusts and facets exists at this location.

North aspects in the higher elevations (above 3,500’) are more suspect based on this profile. The season’s weather history of prolonged periods of dry and cool temps (up high) equate to generally weaker snow.

Photos & Video
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