A weak interface has hit critical load and is proving to be very sensitive. New snow and wind overloading this interface on all aspects and elevations.
Weather Forecast
Steady, seasonally mild alpine temperatures (-5 to -10). Forecasted SW winds with strong to extreme ridge top values. Some snow expected (5 to 10cms). Very good recipe for new building slab conditions.
Snowpack Summary
Surface hoar present in most areas unaffected by moderate winds. Exposed TL and ALP have been stripped of snow. Settling and distribution of upper and mid snow pack overlies facets and basal weakness.
Avalanche Summary
Numerous reactive windslab and loose dry avalanches reported along the parkway up to sz 2.5 on all aspects. Most active at TL elevations between (2200m - 2500m).
Confidence
Wind effect is extremely variable
Problems
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.
Loose Dry
Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.