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Archived

Avalanche Forecast

Jan 17th, 2022–Jan 20th, 2022
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
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Waterton Lakes.

Numerous days of warm temps are deteriorating ice climbs. Look for shady or north facing climbs as ice rebuilds.

Hoping for more snow on Tuesday to improve ski quality.

Weather Forecast

Tuesday: Cloudy with flurries, 10-15 cm accumulation. Moderate west winds. Alpine high -15. FL valley bottom.

Wednesday: Clearing through day. Moderate west winds. Alpine high -8. FL valley bottom.

Thursday: Partially cloudy with flurries. Strong extreme  west winds. Alpine high -5. FL 1500m.

Snowpack Summary

Freezing levels on monday rose to 2100m. A 15 cm rain crust exist up to 2000m. A 1 cm temp crust exists to 2400m on solar aspects. Alpine surfaces range from hard windslab in lees and to bare ground. Well settled midpack. Facets above Dec 4 crust down 150-200 cm. A 20-60 cm thick Nov crust complex completes snowpack to ground.

Avalanche Summary

Evidence of previous cycle (Jan 8-12), with avalanches from size 2 - 4 can still be seen in most avalanche paths. No new avalanches reported or observed today. Limited field observations. Thanks to everyone posting on the Mountain Information Network, keep up the great work, we really do read them.

Confidence

Forecast snowfall amounts are uncertain

Avalanche Problems

Wind Slabs

Strong to extreme SW winds and new snow will form windslabs in lees.

  • Avoid shallow snowpack areas where triggering is more likely.
  • Use caution in lee areas. Recent wind loading have created wind slabs.

Aspects: North, North East, East, South East, South, North West.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5

Persistent Slabs

A few significant large avalanches ran on this layer last week.

  • If triggered the wind slabs may step down to deeper layers resulting in large avalanches.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 2.5 - 4