Avalanche Forecast

Issued: Jan 6th, 2012 4:31PM

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

garth lemke, Parks Canada

Jasper.

The recent storm snow is bonding well yet explosive control work released a few large avalanches to ground. Evaluate terrain carefully especially large features.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Due to the number and quality of field observations

Problems

Wind Slabs

Recent 45cm storm snow has melded into the windslab. Trigger spots are shallow snowpack locations which could initiate a deeper release. Windslabs present lee features. Evaluate local wind effect as directions have been variable.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

1 - 3

Deep Persistent Slabs

Large explosives released a few size 3's to ground today. Midpack strength is generally bridging this layer but the potential still exists if triggered. Consequences would be severe. Natural avalanches unlikely but human triggered possible.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Unlikely - Possible

Expected Size

2 - 4

Valid until: Jan 7th, 2012 4:00PM