An avalanche warning has been issued for a widespread region across southern BC and Alberta.

Avalanche Canada put out the notice Thursday, Feb. 10. It is effective immediately and runs through Sunday, Feb. 13. The warning applies to the following regions: Sea to Sky, South Coast Inland, Cariboos, North and South Columbias, Kootenay-Boundary, Purcells, and Jasper and Glacier National Parks.

For a map of the affected areas, go to

James Floyer, Forecasting Program Supervisor for Avalanche Canada, said the main concern is a critical weak layer buried about 60 cm below the snow surface throughout these regions.

鈥淭his layer is deep enough to produce large avalanches, yet shallow enough to be triggered by a human or machine,鈥� Floyer said in a statement. 鈥淭he forecast of warm temperatures and sun will contribute to this problem this weekend.鈥�

The weak layer is most active at treeline elevation, where the forest opens up and gives way to the alpine and many good riding options exist. Backcountry users are encouraged to stick to simple terrain and to avoid grouping up in places threatened by avalanches from above.

鈥淯nder the current conditions, sparsely treed slopes do not provide protection from avalanches and could be even more dangerous due to the risk of being swept into trees,鈥� Floyer said. 鈥淟ower angled slopes or densely forested areas, where the tree canopies are touching, will be better choices as long as they are not threatened by steep slopes from above.鈥�

Backcountry users should always check their regional avalanche forecasts at www.avalanche.ca. Everyone in a backcountry party needs the essential rescue gear鈥攖ransceiver, probe, and shovel鈥攁nd the knowledge to use it.