Avalanche forecast

Lizard-Flathead

Apr 15 – 16, 2018Avalanche Canada
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Archived · expired 8 years ago

Avalanche danger

Tue
Wed
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
3 · Considerable
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Highlights

New snow and wind on Monday will create touchy storm slabs reactive to human triggers; especially in wind effected terrain.

Avalanche problems

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely - Very Likely
    Size
    1–2
    Snow and wind on Monday will create touchy storm slabs reactive to human triggers.

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–2
    When the sun comes out it will quickly weaken the new snow and cause loose wet avalanching on steep solar slopes.

Confidence

Moderate - Forecast snowfall amounts are uncertain

Weather Forecast

MONDAY: Snow, accumulation 10-20 cm. Moderate to strong easterly ridgetop winds. Alpine temperature -1. Freezing level around 1500 m.TUESDAY: Snow, accumulation 5-10 cm. Moderate southwesterly ridgetop winds. Alpine temperature -1. Freezing level around 1500 m.WEDNESDAY: Mostly cloudy with sunny breaks. Light southwesterly ridgetop winds. Alpine temperature +1. Freezing level rising to around 1700 m.

Avalanche Summary

Several loose wet avalanches up to size 2.5 which were triggered by cornice falls were reported near Fernie on Sunday. Storm slab avalanche activity will likely increase with the forecast snow on Monday.

Snowpack Summary

15-25 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