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Observation: Summit

Location: Tenderfoot

Date:
Observer:
Route & General Observations

AAS Level 2, Group E. toured up the standard W aspect uptrack on Tenderfoot to 2600′. Our objective was focused on snowpack observation and found the New Year’s crust continues to be a layer of concern. We descended on the W aspect, found high quality ski conditions in mellow terrain.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Observer Comments

Recent natural avalanches in steep SSW terrain of Hale Bop (possible from wind events from earlier in the week?)

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

morning clouds to afternoon clearing
Temps in the teens
Calm winds
No precip

Snow surface

stellar dendrites, ~6" of new snow at the parking lot, (beautiful pow)

Snowpack

Group dug 3 pits at 2200', 2 at 2600', 1 at 2500'
Found the new year's crust/facet combo to be reactive and a layer of concern.
Pit results at 2200' WNW aspect

HS= 130cm -31*
CT 19, down 45cm , Failing on NY facets on top of the NY crust
CT 25, down 55cm, below the NY crust
ECTN 17, down 55 cm
PST 40/100 on facets above NYE crust

HS= 130, 31*
CT13 SC, down 30cm
CT22 sc, down 40cm
ECTN

HS=145, 28*
CT14 Q2 SC, down 50cm, failing on facets above the NY crust
ECTN 17, down 50cm, failing on factets above NY crust

PIts at 2600' (HS ranged 110-145cm)

HS=120, W aspect, 25*
CT22 Q2 SC, down 20cm, on advanced facets above the NY double crust
ECTP 14, down 20cm, on advanced facets above NY double crust, below grain size 2-3mm
(1F ~11cm slab above advanced facets)

NW aspect
CT21 Q2, down 20cm, failing on suspected wind slab
ECTN 19, down 18cm , failing on suspected wind slab

2500' NNW aspect
CT16 sc, down 75cm
ECTN 17, down 35cm

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