New snow and strong winds will result in CONSIDERABLE avalanche hazard, especially behind exposed ridges where wind slabs are likely to form. Increase the danger rating to HIGH for your area if 25 cm or more snow falls in a 24 hour period.
Weak layers of surface hoar exist in the upper snowpack. These are most likely to be triggered on steep convex slopes at or below treeline that have not previously been well ridden.
New snow and strong southwest winds will set up storm and wind slabs, particularly behind exposed ridges.
Wednesday night: 5-10 cm new snow. Moderate southwest winds. Treeline temperatures around -4C.
Thursday: approximately 5 cm new snow during the day, with additional snow in the evening. Moderate southwest winds. Freezing level rising briefly to 1000 m in the afternoon.
Friday: 10-20 cm new snow. Strong southwest winds. Treeline temperatures around -4C.
Saturday: Flurries. Moderate southwest winds. Treeline temperatures around -8C.
We have not had any reports of avalanche activity at the time of writing (Wednesday afternoon). Natural avalanches are most likely to occur below steep ridgelines in higher snow parts of the region.
20-40 cm of recent storm snow lies on the surface. You can expect to find three weak layers buried between 30 and 60 cm below the surface. These surface hoar and facet/crust layers have shown signs of being reactive in snowpack tests and could become unstable with the weight of additional snow.
The lower snowpack contains several crust layers. In higher snow areas, these are likely well bonded. However, in shallow areas along the eastern slopes, these could be of concern.
Total snowpack depths are approximately 240 cm in the south of the region, 170 cm around Pine Pass and more like 120 cm in areas to the east.
