Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Regions
South Coast.
Dynamic conditions prevail in the South Coast mountains. Warm overnight temperatures will keep cornices weak before colder temps set in and fresh wind slabs begin to build on Saturday afternoon.
Confidence
Moderate - Due to the number of field observations
Weather Forecast
Saturday: Mainly cloudy with rain showers transitioning to flurries in the evening and periods of snow overnight. Up to 5 cm accumulating at higher elevations by the end of the day. Moderate southwest winds. Freezing level dropping to 1500 metres over the day with alpine temperatures from 0 to -3.Sunday: Cloudy with flurries bringing up to 5 cm of new snow. Light south winds. Freezing level to 1500 metres with alpine temperatures of -4.Monday: Mainly cloudy with isolated flurries and a trace of new snow. Light southeast winds. Freezing level to 1600 metres with alpine temperatures of -3.
Avalanche Summary
No new avalanches have been reported, but there have been limited observations lately.Please enter your observations on the Mountain Information Network (MIN). See here for details.
Snowpack Summary
Friday's warm temperatures and sunshine moistened surface snow on most aspects and elevations. Warm overnight temperatures will prevent it from refreezing into a solid crust. Below the surface, stormy weather over the beginning of this week brought about 50mm of precipitation to the North Shore Mountains, most of which fell as rain to the summits. In the Sky Pilot area, 30-40cm of snow likely fell above 1600m and was redistributed into wind slabs in lee terrain by recent southeast winds. Cornices also gained fragile new growth over the same time period. Below the wind effect, the new snow is now forming a good bond to the underlying crust. The mid and lower snowpack are well settled and strong.
Problems
Cornices
Cornice Fall is the release of an overhanging mass of snow that forms as the wind moves snow over a sharp terrain feature, such as a ridge, and deposits snow on the downwind (leeward) side. Cornices range in size from small wind drifts of soft snow to large overhangs of hard snow that are 30 feet (10 meters) or taller. They can break off the terrain suddenly and pull back onto the ridge top and catch people by surprise even on the flat ground above the slope. Even small cornices can have enough mass to be destructive and deadly. Cornice Fall can entrain loose surface snow or trigger slab avalanches.
Wind Slabs
Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.