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Avalanche Canada cgarritty, Avalanche Canada

Northwest Inland Avalanche Forecast

Apr 24th, 2019 4:22PM

The alpine rating is moderate, the treeline rating is low, and the below treeline rating is low. Known problems include Wind Slabs.

Limited recent field observations mean that this forecast should be used to guide your initial assessment of conditions. See our 'Cold & Snowy' spring scenario for more on managing current conditions.

Summary

Confidence

Low - Due to the number of field observations

Weather Forecast

Wednesday night: Clear with cloudy periods. Light southwest winds.

Thursday: A mix of sun and cloud with a chance of isolated flurries. Light variable winds. Alpine high temperatures around -6 with freezing levels to 1400 metres.

Friday: Cloudy with scattered flurries bringing approximately 5 cm of new snow, continuing overnight. Light to moderate southwest winds. Alpine high temperatures around -7 with freezing levels to 1300 metres.

Saturday: Mainly cloudy. Light northeast or northwest winds. Alpine high temperatures around -5 with freezing levels to 1400 metres.

Avalanche Summary

There have been no recent reports of avalanche activity. If you're out we'd love it if you would submit what you're seeing to the Mountain Information Network.

Snowpack Summary

Approximately 15-30 cm of new snow accumulated over the past week at upper elevations. This storm snow sits over a widespread, supportive melt-freeze crust from early April. Surface hoar and facets were previously observed on this crust on high north aspects. At lower elevations, ongoing warm temperatures have been promoting isothermal snowpack conditions and melting the snowpack away.

Problems

Wind Slabs

An icon showing Wind Slabs

Likelihood

Possible - Unlikely

Expected Size

1 - 1.5

Recent snow and moderate to strong winds have likely built recent wind slabs in the lee of terrain features. More recent slabs and slabs formed on steeper slopes may remain reactive to human triggers on Thursday.

  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
  • Be cautious as you transition into wind affected terrain.

Aspects:

North, North East, East, South East.

Elevations:

Alpine.

Valid until: Apr 25th, 2019 2:00PM