Archived

Avalanche Forecast

Jan 11th, 2017–Jan 12th, 2017

Alpine

2: Moderate

The avalanche danger rating in the alpine will be moderate

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

2: Moderate

The avalanche danger rating in the alpine will be moderate

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.

Thin slabs lurk in alpine and tree-line lee features. Use caution when rolling into your proposed line.

Weather Forecast

Today expect sun with cloudy periods, light north winds at ridge-top, and alpine temp's may reach -13*C. More of the same for Thursday and Friday, with clouds and milder temp's expected over the weekend.

Snowpack Summary

SW winds have created windslabs along the lee of alpine ridges and cross-loaded features. These sit on a variety of old surfaces, from hard windslab, to breakable crust, to faceted soft snow in protected areas. Field snowpack tests are producing mod-hard resistant planar results in the upper 40-60cm.

Avalanche Summary

Numerous loose and storm slab avalanches were observed Monday from Mt Macdonald and Mt Tupper on steep, unskiable terrain. This occurred during Monday's wind event and debris was observed to spread widely across the fans. A few natural size 1-1.5 slab avalanches, likely from Monday, were observed from steep N-facing terrain on Avalanche Crest.

Confidence

Avalanche Problems

Wind Slabs

Stubborn windslabs are present in alpine lee features (ridge-crests, cross-loading gullies). These new slabs sit on old, widespread windslabs, which hide spotty surface hoar.

Be careful with wind loaded pockets, especially near ridge crests and roll-overs.Watch for whumpfing, hollow sounds, and shooting cracks.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2