Avalanche Forecast

Issued: Nov 14th, 2021 4:00PM

The alpine rating is considerable, the treeline rating is moderate, and the below treeline rating is below threshold. Known problems include Storm Slabs and Loose Dry.

Tereza Turecka,

Jasper.

Up to 50mm by Monday night expected on the Parkway.With limited early season observations and uncertainty in the amount of incoming precipitation, please approach avalanche terrain cautiously.For highway closures on 93N check 511AB.

Summary

Weather Forecast

Monday: Snow, heavy at times. Accumulation: 37 cm. Alp temperature: High -1 C; Wind southwest: 20 km/h gusting to 50 km/h; Freezing level: 2000 metres.Tuesday: Precipitation: Nil; Alp temperature: Low -16 C, High -12 C; Wind west: 15 km/h up to 50 km/h.Wednesday: Precipitation: Nil; Alp temperature: Low -18 C, High -11 C; Wind west: 10 km/h.

Snowpack Summary

Around 40 cm of new snow at Parkers ridge in the past 48 hours with moderate to strong south west winds. Alpine and tree-line areas are now gaining enough snow for avalanches, particularly in leeward alpine bowls, gullies, and around ridge lines.

Avalanche Summary

Road patrol observed one small loose dry avalanche running in a steep narrow gully, no alpine or tree line observations due to poor visibility all day. There have been reports of smaller isolated wind slabs in alpine features over the past week, but not a lot of people are out in the mountains so take that into account in your decision making.

Confidence

Forecast snowfall amounts are uncertain on Monday

Problems

Storm Slabs

Although still likely small, these avalanches could have severe consequences in extreme terrain or shallow areas. This avalanche problem is expected to increase with 40mm of precipitation in the forecast by Monday night.

Use caution in lee areas. Recent wind loading have created wind slabs.
Be careful with wind loaded pockets while approaching and climbing ice routes.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Likely

Expected Size

1 - 2

Loose Dry

Ice climbers should use caution for overhead hazard during periods of heavy loading.

Be careful of loose dry power sluffing in steep, confined or exposed terrain.