Recreational Observation

Diamond Head "Bunny Slope"

Jan. 11, 2018, 11 a.m. PST

Weather: Overcast and snowing. S1-2 in the AM picking up to S5 by noon.

Snowpack: This was my first time skiing in the Blewett zone this season and its always surprising to see what a different snowpack it is! Snowpack is barely deep enough to safely travel on skis. Average HS at 5,000ft is 60cm. Structure is poor with 2mm basal facets (of 4F- hardness) beneath the 1/5 rain crust. This crust varied in thickness but was only 2-5mm...thin and friable. It would pop and crinkle under the weight of skis with the weak snow underneath. Water did percolate through the crust at the time of formation, but it didn't go all the way through the snowpack to the ground. There is still a layer of weak, dry, sugary facets 20-30cm thick at the ground. Test results on a NNW aspect on 30 degree slope: CTE SP down 15 on new old interface ECTP E down 15 on new old interface CTM-H SC down 40cm on 2mm basal facets ECTP H down 40cm on 2mm basal facets

Area Description: Blewett Pass

Observation by Matt Primomo

Did you see any avalanches? No

Did you trigger any avalanches? No

Was anyone caught in an Avalanche? No