Avalanche forecast

Glacier

Jan 18 – 19, 2022
View on map
Archived · expired 5 years ago

Avalanche danger

Wed
Thu
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
3 · Considerable
Open full map

Highlights

Storm slabs on surface hoar turned things "electric" Monday afternoon, especially below treeline. Be wary of steep, gladed lines that did not avalanche during the storm.

Tuesday's sun may naturally trigger S'ly-facing slopes...heads up!

Avalanche problems

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    2–4

    The New Year Facets may wake-up if a large storm slab avalanche is triggered onto it. Minimize your exposure to overhead avalanche terrain.

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1.5–3

    25-40cm of snow with warm temps and strong, gusty winds have built a storm slab. A natural cycle at all elevations started around noon Monday, with some bigger results (sz 3) from below treeline start zones failing on the Jan 11 surface hoar layer.

Weather Forecast

A brief ridge will build over the Interior, bringing sunshine, colder temps, and light mtn-top winds.

Tonight: Clearing with flurries, trace ppt, Alp low -11*C, light/gusting strong SW winds

Tues: Sunny periods, Alp high -10*C, light winds

Wed: Cloud with sun/flurries, Alp high -8*C, light SW winds

Thurs: Snow, 20cm, Alp high -5*C, mod/strong SW winds

Snowpack Summary

25-40cm of new snow, coupled with warm temps and mod/strong SW winds, has built storm slabs. The Jan11 surface hoar layer, down 40-60cm, has been extremely touchy with this new load, with numerous natural avalanches starting on this layer. The Dec 1 crust is buried up to 2m deep with weak, faceted snow above and below it.

Avalanche Summary

A natural avalanche cycle involving low elevation (below treeline) storm slabs occurred around noon Monday, with several sz 3's coming close or hitting the highway. Suspect Jan 11 surface hoar layer was sliding layer.

Treeline and above is currently in a natural cycle, with numerous sz 2.5-3's failing on all aspects in the highway corridor.

Confidence

Track of incoming weather systems is uncertain

Regions covered