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Archived

Avalanche Forecast

Mar 25th, 2019–Mar 28th, 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
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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.

Snowpack structure varies greatly with aspect, elevation, and time of day.

Weather Forecast

Tuesday: Mostly Sunny.  Freezing Level 1900m. West wind 30km/h gusting 70.Wednesday:  Cloud. Freezing Level 1700m. NE Wind 25-45 km/h.Thursday:  Cloudy with sunny peroids. Freezing Level 1600m. East Wind 15-40km/h.

Snowpack Summary

Snowpack structure varies greatly with aspect, elevation and time of day. We received 2-5 mm of precipitation over the weekend with a 1600m freezing level.  New snow sits over a 4cm melt freeze crust on solar aspects above 1700m. Pockets of dry snow over windslab still exist on north aspects above TL. Midpack is strong above 1700m & Isothermic BTL.

Avalanche Summary

No new avalanche activity last 48h. A widespread, loose wet avalanche cycle during last weeks tropical heat has filled many avalanche paths with debris.

Confidence

Avalanche Problems

Loose Wet

Primarily a Tuesday concern.
If triggered loose wet sloughs may step down to deeper layers resulting in larger avalanches.Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.

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

Elevations: Treeline, Below Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2

Wind Slabs

Be mindful of the change in wind direction on tuesday night.

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 1.5

Deep Persistent Slabs

There remains a concern for deep weak layers in thin snowpack areas. Warm temperatures and solar radiation have the potential to wake them up.
Avoid shallow snowpack areas where triggering is more likely.Avoid steep convexities or areas with a thin or variable snowpack.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1.5 - 3