Avalanche Forecast

Moderate - Uncertainty is due to the fact that persistent slabs are particularly difficult to forecast.

SUNDAY: Light to moderate westerly winds. Scattered flurries. Freezing levels drop to valley bottom.

MONDAY: Flurries possible with light southwest winds. Mostly cloudy. Freezing levels rise to 1500 m. Alpine high of -1.

TUESDAY: Freezing levels only push higher, reaching near 2500 m. A mix of sun and cloud. Moderate southwest winds. Alpine high +4. 

WEDNESDAY: Around 5 cmm forecast, as freezing levels sit above 1800 m for most of the day. 

Overall reports indicate a gradual tapering of reactivity of the buried weak layers, however reactivity remains in specific features where these weak layers are more prominent. 

Several size 2 slab avalanches were reported on Saturday, from natural and human triggeres. Activity mostly occurred on north facing slopes at treeline, indicating the continued reactivity of the buried surface hoar.

The crust on south facing aspects has shown reactivity within the last 3 days, producing natural and human triggered avalanches to size 2. 

Loose wet avalanches have been reported at elevations below the freezing line, and on sun affected slopes over the past 5 days. 

Up to 60 cm of recent settling storm snow sits over a layer of weak surface hoar in sheltered and shaded terrain, and over a crust on south facing slopes. Test results show that the new snow is bonding poorly to old surfaces in many areas, producing large avalanches within the last 3 days and reactive results to tests. 

At higher elevations consistent southwest winds are creating deeper deposits on north through east facing features. Below 1500 m, moist snow or a melt-freeze crust likely exists from recent rain and warm temperatures.

The late February persistent weak layer combination of crust, facets and surface hoar is down 70-90 cm. Two persistent weak layers from mid-February and late January are buried 100-170cm deep. Avalanches on these layers are unlikely to be triggered.

• Potential for wide propagation exists, fresh slabs may rest on surface hoar, facets and/or crust.
• If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.
• Minimize exposure to sun-exposed slopes when the solar radiation is strong.