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Krusty is tired, but still clowning around down there
Location Name:
Forecaster Observation: Lake McDonald Area
Observation date:
Wednesday, December 18, 2019 - 19:30
Is this an Avalanche Observation:
No
Observation made by:
Forecaster
Location
Tabs
Quick Observation
Quick day off tour in central Glacier Park.
We saw no signs of recent avalanches and got no whumpfing or shooting cracks from buried weak layers.
We found a thin, fragile rime crust on the surface on all aspects and elevations, with low density snow below.
The effects of recent south and southwest winds were obvious, but we had no results stomping on test slopes.
At upper elevations the Krusty show is down about 2-3 feet, and we had many hand shears fail easily in well developed facets under the 12/2 rime crust or more facets under the 11/19 crust. These crusts were softer and thinner than the last time I saw them at this location.
Given our easy hand shears, the poor snowpack structure above about 6,000', and uncertianty because of a lack of more information, we thought, "why expose ourselves to big, steep, rocky bowls - especially above terrain traps."
Obstacles are now hidden just under the surface from 6,000' down to about 5,500'. Below that they're obvious.
Snowpack, Avalanche, Weather Images:
Travel Details
Region:
Glacier National Park - McDonald Lake Area
Route Description:
to 7,500'
Activity:
Skiing
Snowpack Details
Snowpack and Weather Details:
Terrain
Elevation of observation:
3500-5000 ft
5000-6500 ft
Above 6500 ft
Aspect(s) of observation:
NE
E
SE
S
SW
W
Persistent Weak Layers:
Facets or Faceted Crust
Buried
Total Snow Depth:
75cm
More comments about the snowpack and weather:
12/2 and 11/19 crusts were under 40-100cm of F+ to 4F- slab. Crusts were 1F- with F hard, growing facets in between and below.
Wind Speed:
Light (Twigs in motion)
Wind Direction:
Southwest
Air temperature:
Below Freezing
Snow line:
4000'
Sky Cover:
Decreasing Clouds