Avalanche forecast

Lizard-Flathead

Apr 17 – 18, 2018Avalanche Canada
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Archived · expired 8 years ago

Avalanche danger

Thu
Fri
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
2 · Moderate
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Highlights

The general trend is for gradually rising freezing levels and clearing skies. In the meantime pay attention to the bond of the recent new snow to the old snow surface.

Avalanche problems

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    New snow and wind have created new storm and wind slabs.

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–1.5
    When the sun comes out it will quickly weaken the new snow and cause loose wet avalanches on steep solar slopes.

Confidence

Low - Due to the number of field observations

Weather Forecast

WEDNESDAY: Mix of sun and cloud. Light southwest wind. Alpine temperature -1. Freezing level 1700 m. THURSDAY:  Sunny with cloudy periods. Light southwest wind. Alpine temperature 3. Freezing level 2200 m. FRIDAY: Mix of sun and cloud. Moderate west wind. Alpine temperature 4. Freezing level 2300 m.

Avalanche Summary

Several loose wet avalanches up to size 2.5 which were triggered by cornice falls were reported near Fernie on Sunday. Other than that avalanche reports have been limited due to very few information sources this time of year. If you have been out, post you observations on the Mountain Information Network (MIN).

Snowpack Summary

20-30 cm of new snow and moderate winds have formed storm slabs reactive to human triggers. This storm snow overlies numerous crusts in the upper 100 cm of the snowpack. The mid-pack is generally well settled and strong.A layer of sugary facets around a crust can be found near the bottom of the snowpack which has been dormant for some time. Large triggers, such as a falling cornice, or a major warm-up to the snowpack could trigger this layer.

Regions covered