Quick report
- Aspect
- Northeast
- Red Flags
- Wind Loading, Poor Snowpack Structure
- Elevation
- 2438 m
- Slope Angle
- 15°
Today I traveled to Cutler Ridge to examine mid and upper-elevation slopes holding weak, sugary snow beneath the recent storm snow. Surface hoar was observed on all shady slopes that were sheltered from the wind, but it had been destroyed by strong winds at and above treeline. Winds have been moving a lot of snow over the past few days, and although snow available for transport is dwindling, today’s winds were pushing the remaining soft snow into supportable, hard wind drifts. No recent avalanches were observed.
I dug on a wind-loaded northeast slope at 8,000’ and found faceted snow 75cm beneath the surface. An extended column test resulted in propagation on a layer of graupel that fell early in the last storm (ECTP-13 62cm beneath the surface). While the PWL is not showing obvious signs of instability, quickly digging to the ground reveals a poor structure, indicating a setup that strongly suggests “stick to low-angle terrain!”. I would expect wind drifts along the ridgeline to be 3-5’ deep, delicately resting on the weak snow from earlier in the season.
Picture 1: Snowpit
Picture 2: Ben Lomond coverage
Picture 3: Willard coverage
Picture 4: South-facing coverage
Picture 5: Surface hoar (below treeline)
Snowpack
- Instability Comment
- <p>Faceted, old snow can easily be found at the bottom of the snowpack on mid and upper-elevation polar slopes. No recent avalanches were observed, and signs of instability will not make themselves known unless you dig to the ground. With active wind-loading, I put this trend as increasing.</p> <p>Winds from the past few days have moved snow and sculpted supportable and hard wind drifts on leeward slopes. Available snow for transport is diminishing, but today's wind was moving what dry snow remains on the snow surface.</p>
The recent storm drastically improved travel conditions, although bushes and grasses are still halfway covered. At and above treeline, winds have created supportable surfaces easy for travel.