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Archived

Avalanche Forecast

Feb 4th, 2019–Feb 7th, 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: Waterton Lakes.

Avalanche activity appears to have tapered off with the drop in temperature. Bundle up if you are headed out!

Weather Forecast

Tuesday: A mix of sun and cloud with no new snow. Cold temperatures down low with a strong inversion breaking down overnight and light NE windsWednesday: Sunny with cloudy periods, alpine high -18. Light N winds.Thursday: Cloudy with isolated flurries. Alpine high -15. Moderate W winds

Snowpack Summary

20-30cm of recent low density snow has been redistributed by previous strong to extreme west winds, and more recent moderate NE winds in the alpine and at treeline. This sits on a melt freeze crust below 2000m. The midpack is strong in deep snowpack areas, but the facets lingering at the bottom remain a concern in thinner areas.

Avalanche Summary

After peaking on Saturday with several storm slabs to size 2.5 reported in surrounding regions on N-NE aspects at treeline and in the alpine, avalanche activity appears to have tapered off with the drop in temperature.

Confidence

Due to the number of field observations

Avalanche Problems

Wind Slabs

Windslabs have formed with recent new snow and NE winds, and may take longer than usual to bond with cold temperatures.
Keep an eye out for reverse loading created by N-NE winds.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Deep Persistent Slabs

A layer of weak facets is lurking at the bottom of the snowpack. Though there has been limited activity on this layer, it is still on our mind with consistent sudden collapse results in test profiles.
Use conservative route selection, choose moderate angled and supported terrain with low consequence.Avoid steep convexities or areas with a thin or variable snowpack.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3