Avalanche Forecast

Issued: Nov 24th, 2017 3:56PM

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

cgarritty, Avalanche Canada

South Coast Inland.

The region is split, with fresh storm slab and loose wet avalanche problems in the south of the region and a well-consolidated snowpack in the north. Saturday's danger ratings are biased to the south of the region.

Summary

Confidence

Moderate -

Weather Forecast

Saturday: Flurries bringing approximately 5 cm of new snow. Wet flurries in the south of the region. Moderate southwest winds. Freezing level to 1800 metres with alpine temperatures around 0 in the south of the region, 1500 metres and -3 in the north.Sunday: 15-20 mm of rain. Strong southwest winds. Freezing level ranging from 2000 to 2200 metres with alpine temperatures from +1 to +4.Monday: Mainly cloudy with isolated flurries and a trace of new snow. Light to moderate southwest winds. Freezing level to 1300 metres with alpine temperatures around -4.

Avalanche Summary

No new avalanches have been reported, however new storm slabs developed at upper elevations in the south of the region over the course of Thursday's continued stormy weather. Please post your observations to the Mountain Information Network. (MIN)

Snowpack Summary

A shift from rain to snow on Thursday saw new snow accumulating above about 1300 metres in the south of the region. The depth of this new snow is heavily elevation dependant, with up to 30 cm accumulated at the highest elevations in the south of the region. The north of the region saw only a trace of new snow accumulate on the surface after the rain subsided. Below the new snow, recent heavy rain eroded snowpack depths significantly, leaving behind a rain-soaked and relatively uniform 90 cm at treeline elevations throughout the region.

Problems

Storm Slabs

Fresh storm slabs recently formed on the surface in the south of the region and light new snow inputs are forecast to contribute to the problem. Storm slab danger increases with elevation. This problem is largely absent in the north of the region.

The new snow will require several days to settle and stabilize.Use caution in lee areas. Recent snowfall mixed with wind loading has created storm slabs.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely

Expected Size

1 - 2

Loose Wet

Continued potential for loose wet avalanches exists at lower elevations where the surface remains moist from rain and where new snow is moist. This problem is largely absent in the north of the region.

Be cautious of sluffing in steep terrain, particularly where the debris flows into terrain traps.Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.

Aspects: All aspects.

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Nov 25th, 2017 2:00PM