Avalanche Forecast

Issued: Apr 14th, 2017 4:38PM

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

Avalanche Canada mgrist, Avalanche Canada

The new snow following the storm will be touchy on steep slopes, especially where it sits on a firm crust.

Summary

Confidence

Moderate - Due to the number of field observations

Weather Forecast

The clouds will clear out Saturday afternoon, giving way to pleasant weather on Easter Sunday. Back to moist spring weather on Monday afternoon/evening.SATURDAY: Isolated flurries (3-5cm possible) and occasional sunny breaks. Freezing level around 1600 m. Winds light-moderate westerly.SUNDAY: Clearing with some good sunshine. Freezing level rising to 2100 m in the afternoon. Winds light southerly. MONDAY: Snow late in the day (5-10cm) above 1900m. Winds 10-25 km/h from the south.

Avalanche Summary

On Thursday, we had reports of touchy conditions in the Rossland Range with upwards of 35cm of new snow falling at treeline and above, running easily on a temperature crust. Several loose wet avalanches to Size 2 were reported near Kootenay Pass, running on all aspects between 1800m and 2100m elevation.

Snowpack Summary

This region experienced a wide variation in snowfall amounts on Thursday - most areas saw 5-10 cm of wet heavy snow above 1600m; however, the Rossland Range was the 'bulls eye' for enhanced convective snowfall and received upwards of 35cm!The snow and shifting wind directions created fresh wind slabs on a variety of aspects at Treeline and above. The new snow will be prone to sliding in steep terrain where it is sitting on a crust. Cornices are large in some areas and could trigger large avalanches when they fail.

Problems

Wind Slabs

An icon showing Wind Slabs
Shifting wind directions have created fresh wind slabs on a variety of aspects.
The new snow will require several days to settle and stabilize.Be cautious as you transition into wind affected terrain.Use ridges or ribs to avoid pockets of wind loaded snow.

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

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 2

Valid until: Apr 15th, 2017 2:00PM

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