Avalanche Forecast

Archived

Mar 13th, 2020–Mar 14th, 2020

Alpine

Natural avalanches possible, human triggered probable.

Treeline

Natural avalanches unlikely, human triggered possible.

Below Treeline

Natural avalanches unlikely.

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely, human triggered possible.

Below Treeline

Natural avalanches unlikely.

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely, human triggered possible.

Below Treeline

Natural avalanches unlikely.

Regions

Little Yoho.

North winds have redistributed recent snow and are creating wind slabs in some unusual locations. Stay warm out there.

Weather Forecast

The arctic push is on with moderate North winds in the alpine and Eastern gap winds moving through the valleys that will persist through to Sunday. Cold air has flooded the region and -30C is expected overnight Friday in the alpine before some improvement Saturday afternoon .Expect winds to increase to strong in the alpine.

Snowpack Summary

15-25cm of snow over the last 3 days has been redistributed by moderate winds of variable direction at treeline and above creating wind slabs in open areas. On steep solar a thin crust has formed on the surface. The deep snowpack of Little Yoho is generally quite strong with few weaknesses.

Avalanche Summary

No new natural avalanches observed in Little Yoho Friday.

Confidence

Wind speed and direction is uncertain on Saturday

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.