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Archived

Avalanche Forecast

Mar 27th, 2021–Mar 30th, 2021
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
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.

10-20cm of new snow is expected Sunday / Monday with strong to extreme winds. Pay attention to the rapidly changing conditions if you choose to brave the weather.

Weather Forecast

Sun: Periods of wet snow mixed with rain in the townsite. 10-15 cm snowfall at Cameron Lake.  Alpine high of +4 with freezing level at 1800m. Moderate SW wind with extreme gusts up to 120km/h

Mon: Mainly cloudy with scattered flurries. 2-5cm of snow with freezing level at valley bottom. Moderate SW wind with strong gusts

Tues: A mix of sun and cloud

Snowpack Summary

10-20cm of new snow is expected on Sunday with strong- extreme SW wind. This will create fresh wind slabs over a variety of old surfaces including a thick crust that exists to ridgetop (except on high N aspects) or old wind slab on N-E alpine slopes. Mid snowpack is well consolidated with the lower half composed of dense facets & decomposing crusts

Avalanche Summary

No recent avalanche activity reported.

Confidence

Intensity of incoming weather systems is uncertain on Sunday

Avalanche Problems

Wind Slabs

Fresh wind slabs will be most reactive during the storm on Sunday / Monday. Periods of intense wind transport may cause wind slabs to form low in start zones.

  • Use caution in lee areas. New snowfall mixed with wind loading is creating Wind Slabs.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Loose Wet

This problem is specific to lower elevations on Sunday as rainfall will stress the snowpack below freezing level. Be mindful of your overhead hazard and avoid travel through large avalanche paths.

  • Use extra caution on solar slopes or if the snow is moist or wet.

Aspects: All aspects.

Elevations: Below Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5