Observation: Hatcher Pass

Location: Rae Wallace Bowl and Subridge above sledding hill

Route & General Observations

Skinned up to Rae Wallace bowl and took several snow depth measurements as recon for an upcoming field activity. Depths averaged around 100 cm with variances of 90-125cm within a 2 sq meter area.

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 avalanches from earlier in the week during the warm-up. A few were within a day. Several glide cracks visible on W and NW aspects of Marmot

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

Sunny and calm, temperatures in the low 40 in the sun.

Snow surface

There was 2-5mm hoar frost in the shaded areas up at Rae Wallace Bowl sitting on top of a 1/2 cm crust. At pit level there was a sturdier 1 cm crust. Rain runnels present in the lower elevations below the bowl.


Height = 113cm
Aspect = 285
Slope angle = 30 degrees
ECTN 14 (Q3) at 86cm (density change)
CT22 (Q3) at 78cm (density change) but I questioned whether there was a failure at 86 during the wrist taps or just significant compaction. Snow was so sticky the layers didn't want to move. In prying to clear the CT column, the next failure was at 35cm in a change from finger to pencil density)
I had expected to see a failure along a stout ice crust at 66cm, but it remained glued together.
Boot penetration = 30cm
Ski penetration = 8cm