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Avalanche Forecast

Feb 11th, 2019–Feb 14th, 2019
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
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.

Snowfall amounts on Tuesday are uncertain but Windslab will continue to build regardless of storm totals.

Weather Forecast

Tonight: 2 cm of snow overnight. -20Tuesday: 10-15cm of snow throughout the day. Moderate SW winds with Strong to Extreme gusts.Wednesday: Mainly Cloudy with isolated flurries.  Moderate West Winds. Alpine high -8.Thursday: A mix of sun and cloud with Moderate SW wind,. Alpine high -6.

Snowpack Summary

10-20cm of facetting storm snow has added to the formation of Windlsab in the alpine and at ridge top. Windslab will continue to be a primary concern on Tuesday as the forecasted snow is accompanied by moderate - extreme winds. The Midpack is strong in deep snowpack areas but the facets at the base of the snowpack remain a concern in shallow areas.

Avalanche Summary

No new avalanches observed.

Confidence

Intensity of incoming weather systems is uncertain on Tuesday

Avalanche Problems

Wind Slabs

Ski quality is best in sheltered trees.
Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

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.
Avoid steep convexities or areas with a thin or variable snowpack.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3