Northwest Coastal

Stormy weather is maintaining heightened avalanche danger in the region. This forecast is based on limited observations and demands a cautious approach combined with independent information gathering.

Moderate -

Saturday: Cloudy with scattered flurries and 5 to 10 cm of new snow, increasing overnight. Light to moderate south winds. Freezing level to 600 metres with alpine temperatures of -5Sunday: Continuing flurries bringing approximately 5 cm of new snow. Strong south winds. Freezing level rising to 1000 metres with alpine temperatures of -2.Monday: Another round of flurries bringing 5-10 cm of new snow. Strong southwest winds. Freezing level to 1000 metres with alpine temperatures around -3.

Reports from Wednesday included observations of several natural wind slab releases from steep, north-facing alpine terrain in Bear Pass. These were triggered by rain. Reports from Sunday showed evidence of a natural loose wet avalanche cycle focused on steep, low elevation rock slabs along Highway 16 between Terrace and Prince Rupert. Observations of high elevation terrain have been very limited. Please post your observations to the Mountain Information Network (MIN)

Approximately 60 mm of precipitation fell over the region over the midweek storm, accompanied by moderate to strong winds and freezing levels of around 1100 metres. Under these conditions, rain saturated and eroded the snowpack at lower elevations while new snow accumulations of up to 60 cm blanketed the alpine. New snow depths are heavily elevation-dependant, with new snow depths below treeline ranging from 0 to 20 cm. Below the new snow, two weak layers are noted to have formed during the early season. (October 31 and November 11) Although their widespread presence is fairly certain, very few observations or tests of their reactivity exist. With that said, ongoing loading of the upper snowpack carries the potential to activate these deeper weak layers. Looking further to the north of the region near Ningunsaw, the snowpack is starkly different. Here, much drier, colder early season conditions produced a shallow snowpack composed mainly of weak, sugary snow. Snow depths in this part of the region are largely below threshold depths for avalanching.