Avalanche forecast

Glacier

Feb 18 – 19, 2022
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Archived · expired 5 years ago

Avalanche danger

Sat
Sun
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
2 · Moderate

Highlights

Storm slabs will be most reactive in terrain exposed to the wind, and where they overlie Surface Hoar and or a crust.

Expect sluffing in steep unsupported terrain features that was not affected by the wind.

Avalanche problems

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1–2.5

    Wind/Storm slabs developed Thursday with strong winds and new snow. Wind/Storm slabs buried a new layer of Surface Hoar in protected areas, old hard wind slabs in exposed terrain features in the Alpine, and a melt-freeze crust BTL and solar aspects.

Weather Forecast

On Friday expect flurries, moderate SW wind, and the FL to hover around 1300m. Saturday we are expecting ~10-15cm of new snow moderate SW winds, gusting strong, and the FL to stay around 1200m. Sunday they are just calling for flurries.

Snowpack Summary

Storm slabs developed Thursday with Strong SW winds and ~10cm of new snow, bringing our storm total to 30cm. The new snow and strong winds buried a layer of SH in sheltered terrain, old hard wind slabs in the Alpine, and crusts on all aspects BTL and solar slopes into the Alpine. The Jan 29 SH layer, buried 50-80cm, seems to be rounding.

Avalanche Summary

On Thursday field teams triggered 2 size 1 very soft wind slabs on a North aspect at TL. The crown was ~35cm deep, ~5-10m wide, and ran for ~50m. Also on Thursday, one large avalanche occurred in the HWY corridor, on a South aspect starting in the Alpine, terminating far above the HWY.

Confidence

Timing, track, or intensity of incoming weather system is uncertain

Regions covered