Avalanche Forecast

Issued: Apr 19th, 2012 4:48PM

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

mike eder, Parks Canada

Jasper.

Should extended sunny periods combine with warm afternoon temperatures, the avalanche danger may increase quickly at all elevations.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Timing or intensity of solar radiation is uncertain on Friday

Problems

Loose Wet

Warmer temperatures and sunny skies will increase the likelihood of these avalanches. These slides may trigger slab avalanches deeper in the snowpack, especially around convexities near treeline.

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

Elevations: All elevations.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Wind Slabs

Windslabs are present below corniced ridgelines. These slabs have not been reactive in the past week, however, warm temps and solar exposure may wake them up.

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

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Deep Persistent Slabs

This layer is now buried by a settled upper snowpack. Triggering of this layer is still possible especially from a thin spot.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

2 - 4

Valid until: Apr 20th, 2012 4:00PM