Avalanche Forecast

Issued: Jan 8th, 2012 4:00PM

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

Garth Lemke, Parks Canada

Jasper.

Winds gusting 100km/hr at Icefields today. Expecting warm storm to arrive Sunday night into Monday afternoon. Freezing level 1500m. Rain at lower elevations with snow higher up and forecasted 130km/hr winds at 3000m may overload some slopes.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Monday

Problems

Wind Slabs

Extreme winds at the Icefields is redistributing the storm snow. Trigger spots are shallow locations. Initiating could release a deep slab. Evaluate local wind effect as directions have been variable. Storm arriving tonight will add further load.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Unlikely - Possible

Expected Size

1 - 3

Deep Persistent Slabs

Friday's explosives released size 3's to ground. Midpack strength is bridging this layer from human triggering but the potential exists. Consequences would be severe. Natural activity has tapered off but may increase with tonight's storm.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Unlikely - Possible

Expected Size

2 - 4

Valid until: Jan 9th, 2012 4:00PM