Avalanche forecast

Microwave-Sinclair

Apr 17 – 18, 2025Avalanche Canada
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Avalanche danger

Sat
Sun
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
1 · Low
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Highlights

Avalanche danger will remain elevated until freezing levels fall

Avalanche problems

  • Cornices

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2

    Cornices may fail during warm temperatures. Potentially triggering a slab on the slope below.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    2–3

    We have some uncertainty in the reactivity of this layer. Choose conservative, low consequence terrain until the freezing level falls.

  • Loose Wet

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

    Wet loose avalanches could remain possible due to elevated freezing levels.

Confidence

Low

Avalanche Summary

A large avalanche was reported in the Evelyn area on a northeast aspect on Saturday. Check out the details in this MIN.

Snowpack tests continue to show reactivity on buried weak layers, but it's getting hard to pinpoint where they are a problem.

Read a great report from the field team here.

Snowpack Summary

The snow surface will likely be moist on all aspects and elevations except high north facing terrain, where dry snow may still be found.

Two layers currently exist in the mid-snowpack.

  • A layer of surface hoar that formed in early March can be found at a depth of 40 to 70 cm.

  • A layer of facets, surface hoar, and/or a crust from mid-February is buried 60 to 120 cm deep.

Weather Summary

Thursday Night

Mostly clear. 20 to 40 km/h southwest ridgetop wind. Freezing level falling to 2100 m.

Friday

Cloudy with trace amounts of snow possible at high elevations. 30 to 60 km/h southwest ridgetop wind. Freezing level falling to 1600 m.

Saturday

Mostly cloudy with trace amounts of snow. 10 to 30 km/h west ridgetop wind. Treeline temperature -2 °C.

Sunday

Mostly sunny. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be aware of the potential for large avalanches due to buried weak layers.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.
  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for slabs before you commit to it.

Regions covered