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Avalanche Forecast

Archived

Mar 17th, 2021–Mar 18th, 2021

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Banff Yoho Kootenay.

Slightly warmer day expected on Friday, but still not enough to cause too much of a problem - but watch for afternoon heating and in particular in sheltered, sunny aspects mid-afternoon. Ice climbers be out of your gullies by that time of the day.

Weather Forecast

Expect a good freeze on Wednesday night with clear skies and lows of -10. Clear and sunny again tomorrow with light SW wind and temperatures should remain cool, except in the direct sun. Valley temps are going to be near 7C in the warmest part of the day. The pattern changes on Thursday night when a system moves into the area for Friday.

Snowpack Summary

A variety of snow surfaces exist from ice crust to wind crust to soft powder on high, northern aspects. Expect crust on all aspects below 1700 m. Surface hoar up to 1 cm is forming on the snow surface and will become a failure layer for future snow falls. Otherwise the deep snowpack is relatively strong and well settled.

Avalanche Summary

No avalanches were observed or reported in the past 2 days. Although we expect some loose wet to have occurred later in the afternoon with daytime heating and solar input at treeline and below.

Confidence

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.