Avalanche Forecast Jasper National Park

Date Issued: Valid Until:

Parks Canada jonas hoke, Parks Canada

Avalanche Forecast

Mon Apr. 8th ยท 4:00PM

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Moderate

Below Treeline

Danger Ratings Low
Wind Slabs Wind Slabs
Persistent Slabs Persistent Slabs

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Moderate

Below Treeline

Danger Ratings Low

Alpine

Danger Ratings Considerable

Treeline

Danger Ratings Considerable

Below Treeline

Danger Ratings Moderate
A winter snowpack still exists at upper elevations. Be diligent in your hazard management as you transition into the alpine.

Weather Forecast

Unsettled air from a series of low pressure systems hitting the south and then north coast will give several waves of snow flurries, with up to 15cm of accumulation by the end of the week. Tuesday: Cloudy with sunny periods. Flurries in the Icefields area (up to 5cm). Treeline temps: Low -3 C. High 1 C. Ridge wind light NW. Freezing level: 2300m.

Snowpack Summary

Recent small snowfalls are settling quickly, over a melt-freeze crust that extends in to the alpine on all apsects. Small windslabs can be found on lee slopes. A winter snowpack remains on alpine N aspects, with facets under an 20-50cm slab in isolated areas in the Icefields area and further South, and basal depth hoar in shallow snowpack areas.

Avalanche Summary

No new activity has been observed or reported.

Confidence

Forecast snowfall amounts are uncertain

Problems

Wind Slabs

Wind Slabs

Pockets of windslab in immediate lees will be buried by incoming new snow, making them more difficult to manage.

Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2
Persistent Slabs

Persistent Slabs

A weak layer of facets buried 30-50cm down is persisting in some areas. This is more prevalent at the Columbia Icefields & South.

Whumpfing, shooting cracks and recent avalanches are all strong inicators of unstable snowpack.Carefully evaluate big terrain features by digging and testing on adjacent, safe slopes.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood

Possible - Unlikely

Expected Size

1.5 - 2.5