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Avalanche Forecast

Archived

Mar 3rd, 2021–Mar 4th, 2021

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Glacier.

Exercise extra caution if the sun comes out this afternoon, especially on steep solar aspects.

Weather Forecast

A mix of sun and cloud today; starting cloudy, then the sun will try and poke through, as a ridge of High-Pressure starts to build over Rogers Pass. The FL is expected to reach 1600m, an Alpine high of -4, and light winds from the SW. Tomorrow the ridge will settle over us, bringing sunny skies and warm temperatures. The FL will reach 2100m!

Snowpack Summary

Recent strong to extreme winds have left behind a variety of wind slabs in the Alpine and exposed areas of TL. In sheltered areas at and below TL the snowpack is generally "right side up" with decent riding conditions. The February drought layer is buried ~1m, and the Jan 24th layer is down ~1.4m; both layers have been unreactive in snowpack tests.

Avalanche Summary

Minimal avalanche activity has been noted recently. Reports of skier controlled size 1 wind slabs yesterday in the Avalanche Crest WRA, and Ursus Trees. MCR report of an audible off of Mt Bonney, likely a cornice. Expect wind slabs in the Alpine and exposed areas of TL; caution in steep unsupported terrain features where the snowpack is shallow.

Confidence

Due to the number of field observations

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.