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Wind Inversions and Frozen Beer
Location Name:
Upper Railroad Creek
Observation date:
Sunday, October 25, 2020 - 12:00
Is this an Avalanche Observation:
No
Observation made by:
Public
Location
Tabs
Quick Observation
Powder hunting season is officially open, so we loaded up to go harvest.
The mercury read 15 below zero on the summit of Marias Pass around 8:30am.
There was about 2-3 feet of cold dry snow in protected areas down to 5000'
The morning was mostly calm and cold as we traveled up to the ridgeline east of Calf Robe Mountain
We encountered a varietly of snow surfraces along the way. The textures told a story of powerful swirling and whirling winds from all directions in days prior.
Snow depths above treeline varied from 0-6 inches on scoured rollovers to 4' wind drifts.
We climbed up to 7400' and discovered cold light wind blowing from the NW on the ridgetop.
We skiied a northwest facing slope into Upper Railroad Creek and discovered an intense "wind inversion". At the bottom of our run (6500'), Winds were gusting strong (30mph+) downvalley (from the west)
We climbed back up the same slope we had just skiied and found that the most intense winds dimished as you ascended above 6800'
As we made our way back to HWY 2, winds were picking up at all elevations and shifting from NW in the afternoon to W and WSW by 5pm.
Snowpack, Avalanche, Weather Images:
Travel Details
Region:
Glacier National Park - Southern Lewis Range
Activity:
Skiing
Snowboarding
Snowpack Details
Snowpack and Weather Details:
Terrain
Elevation of observation:
5000-6500 ft
Above 6500 ft
Aspect(s) of observation:
NE
E
SE
W
NW
Red Flags:
More than a foot of new snow or heavy snowfall rates (>1"/hr)
Blowing snow
Persistent Weak Layers:
Buried