Valanga

Essex

Sarah WilliamsFlathead Range & Glacier NP
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Quick report

Clear skies, sunshine, and powder were the conditions today in Essex.

  • Air temperature stayed below freezing all day, however the solar input was strong. We observed some small roller balls, minimal shedding of snow off trees, and a slight sun crust forming at our descent at about 3 pm. 
  • One objective for today was to dig into upper-elevation shaded slopes to investigate the current persistent slab structure. 
    • The average depth of the recent storm snow was 55 cm. This new snow is settling, but not yet a distinct, cohesive slab. 
    • We found a "crust complex" comprising varying densities of crust and faceted layers. Please see the snowpack tab for more information. 
    • In both snow pits, we did not get propagation in our long column tests on north aspects. 
  • Given the high-pressure weather, we expect steep, sunny slopes to be primed for loose avalanche activity. 
Few signs of instability: small roller balls, an isolated small slab, and a little snow falling off trees.

Weather

Air Temp
Below freezing
Cloud Cover
clear
Wind Loading
none
Rain Elevation
1000
Recent Snowfall
55 cm at upper elevations
Snow Avail For Transport
large amounts

Beautiful day. No clouds, no wind, and sun all day.

Snowpack

  • Snow profile 1: north aspect, 6600 feet
    • HS: 156 cm, new snow: 56 cm
    • Crust complex: 22 cm (facets-crust-facets-crust layers)
    • ECTX, CTN
  • Snow profile 2: north aspect, 6800 feet
    • HS: 200 cm, new snow 50 cm
    • Crust complex: 30 cm (crust-facets-crust-facets layers)
    • ECTX, CTN

Avalanche

Size
D3 R3
Type
HS
Count
2
Aspect
E
Trigger
N
Elevation
7300 ft

Multiple loose dry avalanches observed on steep slopes in Dickie Creek. Likely occurred earlier in the week.