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Avalanche Forecast

Archived

Mar 24th, 2023–Mar 25th, 2023

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

Regions

Kootenay Boundary, Bonnington, Grohman, Kootenay Pass, Norns, Rossland, South Okanagan, Ymir, Moyie.

The recent snow might not bond well. In areas that recieved more than 20 cm small storm slabs could be triggered.

Confidence

High

Avalanche Summary

Numerous wet loose avalanches were reported during the sunny period earlier this week.

We expect that in localized areas that recently received more than 20 cm of new snow rider triggerable storm slabs could be found.

Snowpack Summary

Up to 20 cm of new snow overlies a crust on all terrain except north facing slopes treeline and above. On these high northerly slopes new snow overlies facets and surface hoar to mountain tops.

The mid pack is generally well settled.

The lower snowpack includes a layer of weak sugary facets near the ground. These facets are slowly gaining strength and no recent avalanches have been reported on this layer. However, we continue to track the layer and watch for any signs of it becoming active.

Weather Summary

Friday Night

Mostly Cloudy with light flurries bringing a few centimeters of new snow. Light westerly winds and a low of -8°C at 1800 m.

Saturday

Mostly cloudy with the possibility of convective flurries bringing up to 5 cm of new snow. Light westerly winds and a high of -2°C at 1800 m. Freezing level rising to 1400 m.

Sunday

A mix of sun and cloud with the possibility of flurries bringing a few centimeters of new snow. Light easterly winds and Freezing levels rising to 1800 m.

Monday

Mostly cloudy with up to 10 cm of new snow possible at higher elevations. Light southerly winds and freezing levels rising to 1700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Closely monitor how the new snow is bonding to the crust.
  • Carefully assess open slopes and convex rolls where buried surface hoar may be preserved.

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.