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Archived

Avalanche Forecast

Dec 15th, 2019–Dec 16th, 2019
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: South Rockies.

Triggering an avalanche is most likely in wind affected terrain and steep rocky slopes.

Confidence

Moderate - Uncertainty is due to extremely variable snowpack conditions reported through the region.

Weather Forecast

Sunday Night: Mix of cloud and starry breaks. Alpine temperature -13 C. West wind 15-30 with gusts to 50 km/hr.

Monday: Mix of sun, cloud, and very isolated flurries. Alpine temperature -10 C. West wind 20-40 gusting to 55 km/hr.

Tuesday: Partly cloudy, partly sunny. Alpine temperature -9 C. West wind 25 gusting to 60 km/hr.

Wednesday: Mix of sun and cloud. Alpine temperature -9 C. West wind 15-30 km/hr.

Avalanche Summary

Most recent avalanche activity (mid to late last week) was limited to a few wind slab avalanches (size 1-2) triggered with explosives.

Snowpack Summary

Recent new snow and wind has likely formed fresh wind slabs at upper elevations. In sheltered areas 20-30 cm of snow from last weekend is gradually settling. Weak snow can be found 30-80 cm deep around crust layers that formed in November and October. These persistent weak layers produced large avalanches last weekend but have gained strength since then. Snowpack depths range between 50-100 cm at higher elevations and taper rapidly below treeline.