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Archived

Avalanche Forecast

Nov 27th, 2019–Nov 30th, 2019
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
4: High
The avalanche danger rating in the alpine will be high
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

Regions: Waterton Lakes.

Waterton was hit hard by the recent upslope storm, and a widespread avalanche cycle is expected. The Akamina Parkway remains closed to public access due to construction.

Weather Forecast

Thursday:  Moderate to Strong NE winds, and snow tapering off with the possibility of an additional 5-10cm and cold temperatures.

Friday: Clearing with continued cold temps, Light to Moderate NE winds

Saturday: Temperatures rising with a high of -5 in town, light westerly winds and no new snow.

Snowpack Summary

A strong upslope storm has so far deposited 50-70 cm of snow in the front ranges, which is forming new windslabs with moderate to strong northeast winds. This overlies a variety of bed surface including old wind slabs from strong southwest winds, bare ground and a thick melt freeze crust where snow from the late September snowfall did not melt out.

Avalanche Summary

Forecasters were not able to get out in the field today, but a widespread avalanche cycle is expected at all elevations.

Confidence

Avalanche Problems

Storm Slabs

50-70cm of new snow has been transported by moderate to strong NE winds, creating slabs that will be very easy for a person to trigger. We are expecting to see a natural avalanche cycle at all elevations.

  • The new snow will require several days to settle and stabilize.
  • Keep an eye out for reverse loading created by an upslope storm.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1 - 2.5