Boletín de aludes

Sea To Sky

Feb 4, 2018Avalanche Canada
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Archivado · caducó 9 years ago

Peligro de aludes

Mon
Tue
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

New snow totals are uncertain in this weather pattern. Danger ratings are based on 5-15 cm of new snow. If snowfall amounts are greater than 20 cm, the danger is CONSIDERABLE and time to dial back your terrain use while avoiding overhead hazard.

Problemas de aludes

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1.5–2.5
    Recent heavy snowfall and high winds have formed fragile new cornices. These monsters may surprise with nasty consequences. Use extra caution around ridge crests.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2
    Areas with high amounts of new snow could be primed for storm slabs whereas areas that see less snow may be more susceptible to wind slabs. Wet loose avalanches are possible below tree line if precipitation falls as heavy rain.

Confidence

Low - Forecast snowfall amounts are uncertain on Sunday

Weather Forecast

Sunday: 5-10cm of snow Saturday overnight to Sunday with another 5-10 cm possible during the day / Moderate gusting strong west winds / Freezing level at 1500mMonday: Mainly cloudy with isolated flurries / Light north westerly winds / Freezing level at 1200mTuesday: Isolated flurries (5cm possible) / Light to moderate south westerly winds / Freezing level 1000m.

Avalanche Summary

On Saturday we received reports of a skier triggered size 1.5 avalanche near Whistler on a north west aspect around 2100m.On Friday ski cutting produced several size 1 soft slabs on immediate down wind (lee) features. Explosives control on Thursday and Friday triggered cornices at ridge crests, mostly size 1.5 - 2.

Snowpack Summary

Over the past two days 7-12 cm of new snow has fallen as temperatures warmed up to +2 at tree line on Saturday afternoon. Winds, however, were strong to extreme from the south, creating fresh wind slabs in exposed downwind (lee) terrain. At lower treeline and below, generally light amounts of snow or rain now overlie a melt-freeze crust which formed during last Monday's warm storm. The new snow adds to the 170cm of snow that fell during the last few weeks of January. These series of storms were accompanied by strong to extreme winds which resulted in extensive scouring and impressive cornice growth in upper elevation terrain. These accumulations sit on a crust from mid-January which generally shows signs of bonding to the overlying snow; however, it has the potential to "wake-up" with a large trigger such as a cornice fall.Below this, the snowpack is thought to be generally strong and well-settled.

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