Avalanche Forecast

Issued: Apr 20th, 2018 4:03PM

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

jlammers, Avalanche Canada

South Coast.

Forecast snowfall amounts are extremely variable throughout the region. Pay close attention to how much snow falls in your riding area and be prepared to back-off to simple terrain.

Summary

Confidence

Moderate - Intensity of incoming weather systems is uncertain on Saturday

Weather Forecast

Saturday: 10-20cm of new snow / Strong southwest winds / Freezing level at 1300mSunday: Clear skies / Light and variable winds / Freezing level at 1900mMonday: Clear skies / Light and variable winds / Freezing level at 2400m

Avalanche Summary

In the short term, new snow and wind will promote new wind slab activity on Saturday while rain at lower elevations may trigger loose wet avalanches in steep terrain. With information regarding avalanche activity and snowpack conditions becoming evermore sparse this time of year, we would very much appreciate it if you spend a moment to submit any observations you have to the Mountain Information Network here, even if it is just a photo. And we wish to thank those of you who have shared your recent observations. Thanks!

Snowpack Summary

New snow and wind on Saturday are expected to form fresh wind slabs in upper elevation lee terrain. Depending on aspect and elevation, the new snow will likely overlie moist snow, a melt-freeze crust or settled storm snow from earlier in the week.Rain is expected to fall at lower elevations where a dwindling spring snowpack exists.

Problems

Wind Slabs

New snow and wind will promote new wind slab development in upper elevation lee terrain. Watch for triggering behind ridge crests and in gullies.

Watch for wind loaded pockets, especially near ridge crests and roll-overs.Stay off recent wind loaded areas until the slope has had a chance to stabilize.

Aspects: North, North East, East, South East, South, South West.

Elevations: Alpine, Treeline.

Likelihood

Likely

Expected Size

1 - 2

Loose Wet

Rain on Saturday may weaken the snow surface and loose wet avalanches in steep terrain may be possible. Be aware that wet slides can entrain mass quickly.

Use caution above cliffs and terrain traps where small avalanches may have severe consequences.Use extra caution on slopes if the snow is moist or wet.Avoid steep slopes if temperatures are warm or solar radiation is strong.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Apr 21st, 2018 2:00PM