Avalanche forecast

Microwave-Sinclair

Mar 10 – 11, 2025Avalanche Canada
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Avalanche danger

Wed
Thu
Alpine
2 · Moderate
Treeline
1 · Low
Below
1 · Low
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Highlights

Strong southerly winds have created fresh wind slabs in the alpine.

Avoid steep north-facing terrain where triggering a wind slab is more likely.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–1.5

    Light new snow and southerly winds are keeping wind slabs reactive. Watch for reactive pockets near ridge crests.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–2.5

    A buried persistent weak layer from February is still capable of producing large avalanches.

Confidence

High

Avalanche Summary

There has been little avalanche activity reported in the previous few days. If you do observe an avalanche, consider posting a MIN.

Looking forward, human triggering of small, fresh wind slabs and deeper, more destructive persistent weak layers remains possible.

Snowpack Summary

Light new snow amounts are beginning to bury a widespread layer of surface hoar crystals, which sit over a crust on solar aspects and low elevations.

A layer of facets, surface hoar and/or a crust formed during the February drought, are buried 30 to 50 cm deep and give easy results in snowpack tests.

Deeper in the snowpack, a weak layer of facets and a crust from early December can be found. This layer appears to be dormant but is still worth managing in thin snowpack areas in the alpine.

Weather Summary

Monday Night

Cloudy with 0 to 5 cm of snow. 30 to 60 km/h southwest ridgetop wind. Treeline temperature -7 °C.

Tuesday

Mostly cloudy with 0 to 1 cm of snow. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -7 °C.

Wednesday

A mix of sun and cloud. 10 to 15 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1100 m.

Thursday

Cloudy with scattered flurries. 10 to 15 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 900 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for slabs before you commit to it.
  • Be aware of the potential for large avalanches due to buried weak layers.

Regions covered