Moderate - Timing or intensity of solar radiation is uncertain
MONDAY NIGHT: Mostly clear / west wind, 10-15 km/h / alpine low -4 C / freezing level valley bottom TUESDAY: Cloudy with sunny periods and isolated flurries, trace accumulation / southwest wind, 20-40 km/h / alpine high 0 C / freezing level 2000 mWEDNESDAY: Mainly cloudy with isolated flurries, trace to 5 cm snow accumulation / southwest wind, 25-55 km/h / alpine high +1 C / freezing level 2100mTHURSDAY: Cloudy with wet flurries, 5-20 cm / southwest wind, 20 gusting to 40 km/h / alpine high +3 C / freezing level 2500 m
On Sunday, a skier triggered a size 1.5 wind slab avalanche on a steep convex roll at 2150 m and explosives triggered a size 2 storm slab avalanche at 2350, both avalanches occurred on a northeast aspect. A natural avalanche Sunday was also observed north aspect at 2300 m. The size 2 storm slab avalanche failed on surface hoar likely buried early April. This isolated layer may see increased stress as winds redistribute snow and add load or temperatures penetrate the snowpack.Late Saturday, storm snow was sloughing in steep terrain with skier traffic and gaining cohesion.
20-30 cm fell around the region since Saturday, south and westerly winds have produced isolated pockets of windslab around ridge crest and lee features. The new snow accumulated over a melt freeze crust on most aspects. On north-facing terrain above 2000 m, the new snow accumulated over another 20-30 cm wind-affected snow from early April, in isolated areas surface hoar may now be buried 50-65 cm. Older wind slabs sitting on surface hoar might still be sensitive to human triggers. Below treeline snow is disappearing rapidly. Sun and rising freezing levels are warming the snowpack and settling new snow, the likelihood of loose wet avalanches will increase as heat penetrates into the snowpack.