Avalanche Forecast

Issued: Dec 2nd, 2019 4:00PM

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

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Dangerous avalanche conditions will exist in areas with more the 30 cm of new snow.

Summary

Confidence

Moderate - Forecast precipitation (either snow or rain) amounts are uncertain.

Weather Forecast

MONDAY NIGHT: 20-30 mm of precipitation with snow above 1000-1200 m, 50 km/h wind from the west, treeline temperatures around 0 C.

TUESDAY: Light precipitation throughout morning with 5-10 mm and then increasing in intensity again in the late afternoon, rain up to 1500 m midday and then the snow line drops to 1200 m in the evening, 50 km/h wind from the west, treeline high temperatures around +2 C.

WEDNESDAY: 30-50 mm of precipitation with snow line fluctuating between 1200 and 1500 m, 70 km/h wind from the southwest in the morning the decreasing to 30 km/h in the afternoon, treeline high temperatures around +2 C.

THURSDAY: Mix of sun and cloud with some light flurries, 20-30 km/h wind from the south, treeline high temperatures 0 C.

Avalanche Summary

So far this season there has been insufficient snow on the ground to produce avalanches. This will change on Tuesday and Wednesday with the incoming storms. Watch for areas where there is enough snow to cover the ground roughness.

Snowpack Summary

A stormy week will bring much needed snow to the South Coast region. 20-30 cm of new snow is possible on Monday night, which will transition to light rain on Tuesday, and then another heavy dose of snow on Tuesday night. This new snow will form the majority of the snowpack. Prior to this storm the North Shore mountains had about 25 cm of snow on the ground and some higher alpine areas had slightly deeper deposits of crusty snow.

Problems

Storm Slabs

An icon showing Storm Slabs

New snow falling on Monday night could produce avalanches on Tuesday. Be extra cautious travelling in avalanche terrain if there's >30 cm of new snow. Also be aware that rain in the afternoon could weaken the snow.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 2

Valid until: Dec 3rd, 2019 4:00PM