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Archived

Avalanche Forecast

Mar 17th, 2021–Mar 20th, 2021
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
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

Regions: Waterton Lakes.

Thursday will be another warm day before things start to cool off this weekend, so start and end your day early.

Weather Forecast

Thursday: Sunny with cloudy periods. Alpine temperature: High 8 °C. Wind SW 15 km/h gusting to 70 km/h. Freezing level: 2400 metres.

Friday: A mix of sun and cloud with isolated showers. Alpine temperature: Low 0 °C, High 6 °C. Wind SW 20 km/h gusting to 65 km/h. Freezing level: 2400 metres.

Saturday: Cloudy with sunny periods and isolated flurries.

Snowpack Summary

A crust exists on the surface to ridgetop on solar aspects and at low elevations breaking down during the day. This tops 30-50cm dense snow above of the Feb 14 facet layer which is above hard surfaces in most places. The remainder of the midpack is made up of dense facets and decomposing crusts, with early season ice crusts forming the base.

Avalanche Summary

Size 1-2 wet loose avalanches have been observed at the heat of the day on solar aspects over the past week, with no slab activity.

Confidence

Due to the number of field observations

Avalanche Problems

Loose Wet

The sun is packing a punch these days, and surface snow can destabilize on steep solar aspects when it comes out.

  • Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.

Aspects: South East, South, South West.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Cornices

Cornices have grown quite large. It's hard to predict when one might fall, but rising temperatures and strong sunshine will make it much more likely.

  • Cornices become weak with daytime heating, so travel early on exposed slopes.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5