Avalanche Forecast

High -

Forecast freezing levels and temperature inversions are tricky to forecast. Precipitation may exist as snow, rain or freezing rain, depending on elevation.THURSDAY NIGHT - Snow, 15-30 cm / south winds, 50-90 km/h / alpine low temperature near 0 / freezing level 1200 mFRIDAY - Snow mixed with rain 20-30 cm, 10-15 cm overnight / south winds, 40-80 km/h / alpine high temperature near +1 / Freezing level 1500 m / possible alpine temperature inversionSATURDAY - Snow mixed with rain, 10-15 cm, 5-10 cm overnight / south winds, 30-60 km/h / alpine high temperature near +1 / freezing level 1500 m / possible alpine temperature inversionSUNDAY - Flurries, 5-10 cm / south winds, 30-50 km/h / alpine high temperature near +1 / freezing level 1500 m / possible alpine temperature inversion

A natural avalanche cycle is expected throughout the day on Friday.A few explosives triggered avalanches to size 2 were reported in the region on Thursday.

Up to 30 cm of new snow Thursday night adds to the growing pile of storm snow. Strong to extreme winds, warm temperatures and ongoing snowfall/rainfall will be promoting widespread slab formation.Approximately 60-100 cm of recent storm snow sits on a melt-freeze crust at treeline and below. In some sheltered areas, this snow is sitting on a weak layer of surface hoar (feathery crystals). For most of the region, a weak layer of facets (sugary snow) buried in early December exists down 180-250 cm. It is likely that this layer was the culprit of a large, remotely-triggered avalanche on December 30 near Terrace, described in a MIN report here. The likelihood of triggering this layer is decreasing, but it could be triggered by humans in shallow snowpack areas. The potential may also exist for storm slab avalanches to step down to this layer, resulting in large avalanches.In the northern part of the region, near Ningunsaw pass, a couple of weak layers of surface hoar may be found that were buried near the end of December. Expect to find these layers about down approximately 100 to 180 cm.