Avalanche Forecast

Issued: Nov 28th, 2016 3:51PM

The alpine rating is below threshold, the treeline rating is below threshold, and the below treeline rating is below threshold. Known problems include Storm Slabs.

cam_c, Avalanche Canada

South Coast Inland.

There is low confidence in this forecast due to limited observations. As always, and especially when confidence is low, it is essential to supplement this information with your own observations. and don't forget to post them to the MIN!

Summary

Confidence

Weather Forecast

A mix of sun and cloud and generally dry for Tuesday before a weak storm pushes through overnight Tuesday with 2-5 cm expected by Wednesday afternoon, accompanied by moderate southwesterly ridgetop winds. Another dry day is expected for Thursday. Daytime high freezing levels are expected to hover around 900 m for the forecast period.

Avalanche Summary

No new reports from the alpine. Duffey Lake highways patrol recorded numerous size 2.0 and one size 3.0 storm slab avalanches on Friday.

Snowpack Summary

Another 10-15cm of fresh snow brings treeline snowpack depths to around 140 cm in the Duffey Lake area, but only around 60 cm in Coquihalla Pass. Slopes that were loaded by southwest winds during recent storms may have developed deep pockets of weak wind slabs. A thick crust can likely be found in the mid-pack down 50-70 cm at treeline elevations or deeper in the alpine. Buried surface hoar has also been reported in the early season snowpack.

Problems

Storm Slabs

Storm slabs that developed on Friday are likely settling and strengthening, but triggering may still be possible. Watch for particularly deep and weak wind slabs on the downwind side of ridge crests at terrain features in exposed terrain.

Make observations and assess conditions continually as you travel.Be alert to conditions that change with elevation.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Nov 29th, 2016 2:00PM