Danger will increase this week as snow and strong winds are expected to start on Thursday afternoon.
Summary
Confidence
Moderate - Intensity of incoming weather systems is uncertain
Weather Forecast
THURSDAY: Cloudy with flurries starting in the afternoon, strong west winds, treeline temperatures around -15 C.FRIDAY: 10-20 cm of low density snow, strong west winds, treeline temperatures around -17 C.SATURDAY: Another pulse of snow with 10-30 cm possible, strong west winds, treeline temperatures around -20 C.
Avalanche Summary
No recent avalanches have been reported. On Monday, one large naturally-triggered avalanche (size 2) was reported on a north-facing alpine feature that likely failed on the mid-December surface hoar layer. There have been some isolated reports of whumpfs at small avalanches failing on the mid-December surface hoar layer, but in most areas the snow above this layer has not settled into a slab yet.
Snowpack Summary
Cold temperatures are preserving roughly 50 cm of low density snow from last week's storms. The snow is being deposited into harder wind slabs in exposed terrain, but remains low density in sheltered areas. The main question in the snowpack surrounds the mid-December layer buried 50 cm below the surface. The layer includes crusts on south and west facing slopes and feathery surface hoar in sheltered areas at and below treeline. The distribution of the layer, as well as the properties of the snow above it, is variable. The most suspect areas are where the wind has formed stiff slabs above the layer and on slopes with preserved surface hoar. The lower snowpack is generally well settled with a thick prominent crust that was buried near the end of November.
shorton,
Avalanche Canada
