Use caution in wind-loaded areas in the alpine where snow remains dry and wind slabs linger.
Use caution in wind loaded alpine lees where snow remains dry and deep pockets of cohesive slab remain possible to human trigger. Watch for signs of instability as above 0 °C temperatures reach into the alpine.
On Sunday explosives control in the region produced numerous storm slab avalanches up to size 2.
On Saturday, storm slabs were reactive to skier triggering with several, size 1 to 1.5 avalanches being reported. Storm snow was particularly reactive in wind loaded ridgetop terrain.
Thank you to everyone who has been sharing observations on the Mountain Information Network. All the information and photos are very appreciated by forecasters!
15-20 cm of recent snow and strong southerly winds have built pockets of cohesive slab in the alpine. This overlies a melt freeze crust and in sheltered areas a layer of weak surface hoar.
Below 1900m snow surface is moist. 50 cm down is a thick widespread supportive crust.
Overall, the snow depth remains relatively shallow, with numerous hazards present at or just below the snow surface across all elevations.
Monday Night
Clear skies with no precipitation, northwest alpine winds 15 km/h, treeline temperature 0 °C, freezing levels 1700 m.
Tuesday
Mainly sunny with no precipitation, southwest alpine winds 30 to 40 km/h, treeline temperature +1 °C, freezing levels rise to 2200 m by afternoon.
Wednesday
Cloudy with flurries, 5 to 15 mm accumulation, southwest alpine wind 60 to 80 km/h, treeline temperature -2 °C, freezing level 1200 m.
Flurries continue overnight bringing another 10 to 15 mm of accumulation.
Thursday
Mainly cloudy with isolated flurries, trace accumulation, northwest alpine wind 15 to 30 km/h, treeline temperature -4 °C, freezing level 800 m.
More details can be found in the Mountain Weather Forecast.
