Avalanche Forecast South Coast Inland

Date Issued: Valid Until:

Avalanche Canada jsmith, Avalanche Canada

Avalanche Forecast

Fri Apr. 12th ยท 4:43PM

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Moderate

Below Treeline

Danger Ratings Low
Wind Slabs Wind Slabs

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Moderate

Below Treeline

Danger Ratings Low

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Low

Below Treeline

Danger Ratings Low
Light amounts of new snow and moderate southwesterly winds may form fresh small wind slabs reactive to human triggers. Use caution around lee terrain features and convex slopes.

Confidence

High -

Weather Forecast

FRIDAY NIGHT: Increasing cloudiness / Light, westerly winds / Alpine low -4 C / Freezing level 1000 m.SATURDAY: Cloudy with flurries; 3-10 cm. / Moderate, southwesterly winds / Alpine high -3 C / Freezing level 1500 m.SUNDAY: Mix of sun and cloud / Light, westerly winds / Alpine high -4 C / Freezing level 1400 m.MONDAY: Mostly cloudy / Light, westerly winds / Alpine high -2 C / Freezing level 1600 m.

Avalanche Summary

No new avalanches were reported in this region on Thursday.A MIN report from Blowdown here documents a size 2 skier triggered wind slab avalanche on a northeast alpine aspect on Monday.A MIN report from the Whistler Backcountry here documents a similar skier triggered slab avalanche on Monday. The avalanche was triggered on a northwesterly aspect in lee terrain below a ridge feature. While outside the forecast region, the avalanche highlights the wind slab problem that exists in the South Coast Inland.

Snowpack Summary

Currently, the snowpack structure changes dramatically with elevation and aspect. 10-20 cm. of recent storm snow (amounts tapering with elevation) is sitting on a melt/freeze crust, except for north facing terrain above 2000 m. where the old snow surface remained dry and small surface hoar (weak, feathery crystals) may be present in isolated locations. This recent snow has been affected by the sun and re-distributed by southerly winds, forming wind slabs on lee features below ridgetops.Below roughly 1900 m, the snowpack is moist and is melting rapidly at lower elevations. Check out this useful link for managing avalanche hazard during spring conditions HERE.

Problems

Wind Slabs

Wind Slabs

Light amounts of new snow and moderate southwesterly winds may form fresh small wind slabs reactive to human triggers. Use caution around lee terrain features and steep, convex slopes.

Avoid wind loaded slopes below ridgetops.Pay attention to changing conditions with elevation/aspect.Use small slopes without consequence to test the bond of the new snow.

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

Elevations: Alpine, Treeline.

Likelihood

Likely - Possible

Expected Size

1 - 1.5