Avalanche Forecast

Archived

Mar 10th, 2019–Mar 11th, 2019

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely.

Below Treeline

Natural avalanches unlikely.

Alpine

Natural avalanches possible, human triggered probable.

Treeline

Natural avalanches unlikely, human triggered possible.

Below Treeline

Natural avalanches unlikely.

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely, human triggered possible.

Below Treeline

Natural avalanches unlikely.

Regions

Jasper.

First major change in a month arrives Monday afternoon and overnight. Pay close attention to new snowfall accumulation, and watch for surface snow being blown into Wind Slabs.

Weather Forecast

A front charging through BC brushes JNP Monday. Mon: Cloud thickening, snowfall forecast in PM, easing midnight (4-8cm). Treeline temperature steady near -9. Strong to Extreme SW alpine winds (Moderate rising Strong at treeline).Tues: Flurries, Light snowfall. Winds ease to to L NW. Treeline Low -10, High -7. Weds: Cool, calm, sun & cloud.

Snowpack Summary

The snowpack remains mainly dry and faceted. The mid pack is relatively strong for the region, and supportive to skis in most areas. Isolated surface hoar still exists at/below tree line, South of the Icefields. A thin sun crust has been observed below tree line on solar aspects.

Avalanche Summary

A flight from the Saskatchewan River to Jasper observed a Size 2 cornice fall, not triggering any slab on the slopes below; and several recent, small, Loose dry avalanches on steep, South facing alpine slopes. One large Whumph on flat treeline terrain South of the icefields, on January 18 surface hoar, down 40cm.Share your day here, on the MIN!

Confidence

Intensity of incoming weather systems is uncertain on Monday

Problems

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.