Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Nov 25th, 2018–Nov 26th, 2018

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Kootenay Boundary.

Keep the observations coming! Recent Mountain Information Network reports are highlighting the importance of diligent travel practices and careful attention to wind loading patterns.

Confidence

Moderate - Forecast snowfall amounts are uncertain

Weather Forecast

Sunday night: Cloudy with clear periods. Light southwest winds.Monday: Cloudy with flurries increasing and bringing about 5 cm of new snow by evening, increasing overnight. Light to moderate southwest winds. Alpine high temperatures around -2 with freezing levels of about 1400 metres and remaining elevated overnight.Tuesday: Cloudy with continuing flurries bringing 10-15 cm of new snow. Moderate to strong south winds. Alpine high temperatures around -1 with freezing levels rising again to about 1700 metres.Wednesday: Cloudy with isolated flurries and a trace of new snow. Light southwest winds. Alpine high temperatures around -2 with freezing levels to about 1500 metres.

Avalanche Summary

A MIN report from Saturday describes a snowboarder triggering and getting caught in a smaller (size 1) storm slab that appeared to have been formed by cross-loading winds in the Ymir bowl area. See the full report on the MIN here.On Saturday in the Meadow Creek area of the neighbouring South Columbias, a group of snowmobilers triggered a large deep persistent slab that released to ground and resulted in multiple involvements. Although still an isolated event, travelers should be aware of roughly similar snowpack characteristics in the Kootenay Boundary region and maintain cautious travel practices - especially in complex terrain at higher elevations. See the full report on the MIN here.Please submit any observations you have to the Mountain Information Network here.

Snowpack Summary

Alpine snow depths in the region are around 60 to 80 cm. 10 to 30 cm of recent storm snow overlies a layer of surface hoar that was buried on November 21. This layer is expected to be variable in nature and may have been melted into a crust on southern aspects.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.