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Avalanche Forecast

Archived

Apr 26th, 2021–Apr 27th, 2021

Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.

Regions

Banff Yoho Kootenay.

Good spring powder conditions can be found on high north aspects.

Click the "More Spring Conditions details" link found below for information on various spring condition scenarios.

Weather Forecast

Mixed sun and cloud forecast for Tuesday with freezing levels rising to 2200m. Upper elevation winds will increase to the mod to strong range by the afternoon.

Snowpack Summary

Surface crusts or "dust on crust" exist on all aspects to 2000m. In the alpine 10-25 cm of recent snow overlies crusts on solar aspects and dry snow on northerly aspects. Good freezes overnight make for solid crusts in the morning that become soft or corn-like in the afternoon (depending on aspect).

Avalanche Summary

No new avalanche activity observed or reported on Monday. Expect to see loose wet avalanches on solar aspects in the afternoon as the day warms up.

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.

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.