Avalanche Forecast
Issued: Jan 11th, 2017 8:00AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
chris gooliaff,
Parks Canada
Thin slabs lurk in alpine and tree-line lee features. Use caution when rolling into your proposed line.
Summary
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
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
Expected Size
Valid until: Jan 12th, 2017 8:00AM
