Archived

Avalanche Forecast

Feb 22nd, 2019–Feb 23rd, 2019

Alpine

1: Low

The avalanche danger rating in the alpine will be low

Treeline

1: Low

The avalanche danger rating at treeline will be low

Below Treeline

1: Low

The avalanche danger rating below treeline will be low

Alpine

1: Low

The avalanche danger rating in the alpine will be low

Treeline

1: Low

The avalanche danger rating at treeline will be low

Below Treeline

1: Low

The avalanche danger rating below treeline will be low

Alpine

1: Low

The avalanche danger rating in the alpine will be low

Treeline

1: Low

The avalanche danger rating at treeline will be low

Below Treeline

1: Low

The avalanche danger rating below treeline will be low

Regions: Glacier.

Watch for unstable snow in isolated areas and extreme terrain where wind slabs exist.

Weather Forecast

A low pressure system sliding down the BC coast and will deliver light precipitation to the area today with trace amounts of accumulation. Mainly cloudy with isolated flurries, alpine high of -11.0, ridge winds SW 20-30 km/hr, freezing level at 500m. We will see a return to sun and frigid temperatures Monday.

Snowpack Summary

15cm of settled snow on old wind slabs in the alpine. In sheltered areas the recent snow is covering surface hoar and facets. A crust on steep solar aspects makes for difficult traveling conditions, both uphill and down. The mid and lower snowpack is well settled and strong. Wind and new snow will likely create isolated soft slabs by tomorrow.

Avalanche Summary

Three size 1.5 and one size 2.0 natural avalanches were observed in south facing avalanches paths in the highway corridor east of Rogers Pass. The avalanches were loose release resulting from solar input. A recent MIN report was received of a small skier triggered slab avalanche in the Connaught slide path that released on a near-surface crust.

Confidence

Avalanche Problems

Wind Slabs

Pockets of wind slab still exist in the alpine and open areas at tree line, though becoming hard to find. Even a small wind slab can have big consequences in certain terrain features (steep, rocky, exposed terrain, etc).

Be careful with wind loaded pockets, especially near ridge crests and roll-overs.Variable winds have created pockets of wind slab on all aspects.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2