Avalanche Forecast

Issued: Mar 10th, 2019 4:18PM

The alpine rating is moderate, the treeline rating is low, and the below treeline rating is low. Known problems include Wind Slabs.

Ruari Macfarlane, Parks Canada

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.

Summary

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

Fresh wind slabs will develop through the day on lee features from Strong-Extreme SW winds.

Convex features and steep unsupported slopes will be most prone to triggering.Minimize exposure during periods of loading from new snow and wind.

Aspects: North, North East, East, South East, North West.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 1.5

Valid until: Mar 11th, 2019 4:00PM