Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Regions
Glacier.
Surface conditions are quite variable; even similar aspects and elevations, can have drastic differences. Evaluate each slope individually. Dig down and assess the buried wind slabs, cold temperatures continue to weaken the upper snowpack.
Weather Forecast
A weak low-pressure system tracks through BC today, narrowly missing Rogers Pass. Minuscule amounts of new snow can be expected, winds should stay light from the S-SW, and the temperatures will remain cold. Tomorrow the high-pressure will settle back over Rogers Pass, until Friday when the next weak weather system tracks SE from the NW.
Snowpack Summary
15cm of storm snow covers old hard wind slabs in the alpine and exposed areas of tree line. In sheltered areas at and below tree line the storm snow is covering surface hoar and near surface facets. The Jan 17 surface hoar is down 50-70cm at TL and below. the mid and lower snowpack is well settled and strong.
Avalanche Summary
No new avalanche activity in the HWY corridor yesterday. One MIN from Connaught drainage confirming the solar cycle on Sunday; which produced numerous size 1-1.5 loose dry, some triggering slabs up to size 2.5. Cheops North 4 also ran to size 1.5 (loose dry), and Nicky's Notch had a cornice triggered slab, size 2.5.
Confidence
Due to the number and quality of field observations
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.