Avalanche Forecast

Archived

Feb 21st, 2015–Feb 22nd, 2015

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely.

Below Treeline

Natural avalanches unlikely.

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely.

Below Treeline

Natural avalanches unlikely.

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely.

Below Treeline

Natural avalanches unlikely.

Regions

Little Yoho.

The danger in decreasing in the Little Yoho area. Watch for fresh wind slabs near ridge crests which may be sitting on facets. Skiing at treeline and below will be "non-optimal" until it snows. SH

Weather Forecast

Temperatures will start to warm up Sunday with a slight inversion forming (alpine temperatures staying below freezing.) Winds will remain light from the N with a mix of sun and cloud. No snow in the forecast.

Snowpack Summary

A generally deeper and well settled snowpack exists in the Little Yoho region compared to East of the divide. There are areas with basal facets in shallow snowpack areas but we have seen little activity on this layer. Below 2000m, breakable melt-freeze crust transitions to bullet proof melt-freeze crust making for rugged skiing.

Avalanche Summary

No new avalanches were reported today in Little Yoho.

Confidence

Due to the number of field observations 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.