The avalanche danger will increase into the weekend, with snowfall forecast to begin Friday afternoon, giving a total accumulation of up to 25cm by Sunday.
Fresh slabs may build through out the day with incoming SW winds.
Previous pockets of wind slab were reactive recently where loaded on to a sun crust by Northerly winds.
Storm slabs will likely begin to form Friday evening, becoming the primary problem by Saturday.
A frontal system gives moderate snowfall, warming temps, and strong SW wind into the weekend
Tonight: Clear periods, Alpine low -13*C, light SW ridgetop wind
Fri: Flurries turning to snowfall (10cm), High -6*C, moderate SW wind, freezing level (FZL) 1100m
Sat: Flurries (10cm), Low -9*C, High -7*C, strong SW wind, FZL1300m
Sun: Flurries (5cm), FZL 1500m
Incoming snow will cover a variety of surfaces - a crust on steep solar aspects (widespread below 1500m), settled pow in shaded/sheltered areas, and wind effect in the alpine from Northerly switching to SW winds. The Feb 26th interface (small surface hoar or suncrust) lingers down 30-40cm but has not been reactive recently.
Tuesday - there was a near miss in Loop Brook drainage, when a rider remote triggered a size 2.0 slab at ridge top, NE asp, MCR.
A near miss from a cornice fall in MacDonald gully #11.
And, an MCR reporting isolated wind slabs in the Illecillewaet drainage.
