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Archived

Avalanche Forecast

Dec 8th, 2020–Dec 11th, 2020
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Waterton Lakes.

New snow on Wednesday will hide some of the stumps and rocks still poking through our thin, early season snowpack.

Weather Forecast

Wednesday- Freezing level 1800m. 5-10mm of precipitation. Light West wind.

Thursday- Freezing level dropping to valley bottom. Moderate West wind  Mix of sun and cloud with a clearing trend in the afternoon. No precipitation.

Friday- Freezing level remaining at valley bottom. No precipitation.

Snowpack Summary

Wind has scoured SW aspects to ground the alpine. A melt freeze crust is expected to form on solar aspects as freezing level drops with incoming storm on wed. Northerly aspects above 2000m have a wind slab sitting over a old melt freeze crust. 80cm of snow at Cameron Lake @2000m. Less than 20cm in rest of park. Below threshold at lower elevations.

Avalanche Summary

No new avalanches observed.

Confidence

Avalanche Problems

Storm Slabs

Wed storm snow will fall on top of a melt freeze crust on solar aspects, & old wind slab on northerly aspects. Either way, expect the new snow to be reactive in steep terrain. Loose dry avalanches are possible if temperatures are colder than forecast

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 1.5

Loose Wet

This problem is our primary concern on wednesday with high freezing levels and 5-10mm of precipitation in the forecast. Wet loose will not be an issue when the freezing levels drop on thursday.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2