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Wind transport at JFS
Location Name:
Forecaster Observation - John F Stevens Canyon
Observation date:
Monday, March 2, 2020 - 18:30
Is this an Avalanche Observation:
No
Observation made by:
Forecaster
Location
Tabs
Quick Observation
Toured near JFS canyon to monitor wind slab formation.
We observed signs of fresh wind slab formation including blowing snow from moderate to strong winds, skin tracks getting filled in, and areas of denser/deeper feeling snow. A few test slopes produced cracking up to 5’ long. However, slabs were thin (up to 8”), soft, and isolated across the terrain that we traveled in.
We felt comfortable skiing steep terrain, while being wary of wind loaded features in terrain where the consequences of a small wind slab could be trouble.
There is about 3" of dense, wind affected snow overlying crusts or settled powder from last week. Even in sheltered areas, the winds had affected the snow surface.
Snowpack, Avalanche, Weather Images:
Travel Details
Region:
Flathead Range/Glacier National Park - John F. Stevens Canyon
Route Description:
To 7300'
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:
E
SE
NW
Red Flags:
Blowing snow
New Snow in the past 24 hours:
1.00in.
More comments about the snowpack and weather:
A few periods of strong gusts and moderate transport
Blowing Snow:
Light
Wind Speed:
Moderate (Small trees sway)
Wind Direction:
West
Air temperature:
Below Freezing
Snow line:
Valley
Sky Cover:
Overcast (OVC)
Highest Precipitation Rate:
Light Snowfall (S1)