Shed 7 East

Location Name: BNSF Avalanche Safety - Snowslip Mtn. GNP Observation date: Wednesday, February 3, 2021 - 21:45	Is this an Avalanche Observation: Yes

Observation made by: Public

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Quick Observation

Toured up the Shed 6/7 ridge and conducted snow profile in the starting zone of Shed 7 East.
Surface snow conditions in this terrain feature consisted of ~16” of accumulated snowfall on the January 13th crust
Snow depths averaged ~75” or less at this location ~6300’ a.s.l
Objectives were to:
- Observe snowpack instability in and around the Shed 7 area.
- Assess snow surface conditions.
- Conduct snow profile(s) in the upper starting zones of Shed 7 East.

No recent avalanche activity observed in the Shed 7 area
Recent debris did seem to be present in the “Larry” path located on the north face of “Devils Hump.”
Larry path debris appeared to have terminated approximately 2/3rds distance to the Canyon floor.

Minor cracking in upper ~6” of snowpack. No audible failures, and/or collapses observed.

~4500’ and below...Breakable surface crust under 2-3” moist snow
~4500 to 5800’…3-6” moist new snow on crust and moist facets/snow beneath crust to the ground.
~5800 to 6300+…Approximately 10-18” of accumulated snow on the January 13th crust with a thin layer of facets found above crust.
Wind loading on easterly aspects observed at ridgeline elevation.
Snow profile conducted at ~6300’ on east aspect of Shed 7 East. (Pit profile photo).

Overcast or broken skies for the entire field day.
Good visibility at all elevations.
Sporadic snowfall throughout the day with only trace accumulations.
Air temperatures were in the upper 20s (0F) at lower elevations and low 20s (0F) at upper elevations

Snowpack, Avalanche, Weather Images:

Travel Details

Region:

Flathead Range/Glacier National Park - John F. Stevens Canyon

Activity:

Skiing

Avalanche Details

Avalanche Details:

Date and Time of Avalanche:

Monday, February 1, 2021 - 12:00

Number of avalanches:

Avalanche Type:

Unknown

More information or comments about the avalanche:

Uncertainty high. All we could really discern was what looked like a line of debris extending down the path, pushing down/burying the brush.

Trigger

Trigger:

natural

Terrain

Aspect:

North

Starting Elevation:

near-treeline

Size

Destructive Size:

D2 Could bury, injure, or kill a person.

Avalanche Length (Vertical Run):

1000ft.

Avalanche Location:

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