Avalanche Forecast

Archived

Mar 20th, 2020–Mar 21st, 2020

Alpine

Natural avalanches unlikely.

Treeline

Natural avalanches unlikely.

Below Treeline

Natural avalanches unlikely.

Alpine

Natural avalanches unlikely.

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.

Solar heating should diminish around noon Saturday. Be cautious with the recent windslabs.

Weather Forecast

Saturday will dawn clear at around -10C in the alpine. Friday's moderate SW winds will back off through the day Saturday while cloud increases in the afternoon to give a few flurries. Temps will be a bit cooler than Friday reaching freezing at 1500m. Similar conditions for Sunday as the winds pick back up to moderate to strong in the alpine.

Snowpack Summary

5-10cm of snow accumulation over the last few days. Widespread wind effect in the alpine from recent multidirectional winds. Sun crust on steep solar aspects. The deep snowpack of Little Yoho is generally strong with few weaknesses.

Avalanche Summary

Several solar triggered small loose avalanches observed Wednesday and Thursday. Otherwise, no new avalanches observed or reported.

Our observations are very limited and we appreciate your reports to the MIN.

Confidence

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.