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Avalanche Forecast

Archived

Mar 23rd, 2023–Mar 24th, 2023

Alpine
Natural avalanches unlikely, human triggered possible.
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.
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.

Keep an eye on new snowfall amounts. New rider triggerable storm slabs could form throughout the day.

Confidence

Moderate

Avalanche Summary

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

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

Snowpack Summary

Around 10 cm of new snow will overlie a crust on solar aspects and at lower elevations. on High north facing terrain this new snow will overlie surface hoar.

30-50 cm down there is a old sun crust on solar aspects and a layer of surface hoar (3-5 mm) on isolated shady and sheltered slopes.

Another layer of surface hoar or sun crust, aspect dependent, that was formed in mid-February can be found down 80 to 110 cm.

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

Thursday Night

Mostly cloudy with up to 10 cm of new snow expected. Light to moderate southerly winds and a Low of -5°C at 1800 m.

Friday

Mostly Cloudy with flurries bringing up to 10 cm of new snow. Light southwest winds and a High of -2°C at 1800 m. Freezing level rising to 1400 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 1500 m.

Sunday

Mostly cloudy with the possibility of flurries bringing up to 5 cm of new snow. Light southeast winds and Freezing levels rising to 1800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for changing conditions today, storm slabs may become increasingly reactive.

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.