Moderate - Timing or intensity of solar radiation is uncertain
FRIDAY NIGHT: Mainly cloudy, alpine low temperature -5C, light southwest wind.SATURDAY: Cloudy with sunny periods, alpine high temperature of -2C, light west wind at most elevations, moderate at ridgetop, freezing level around 2000m. SUNDAY: Sunny with cloudy periods, alpine high temperature of 0C, light west wind. freezing level around 2200m, no overnight re-freeze expected.MONDAY: Mix of sun and cloud, alpine high temperature of +3C, light west wind at ridgetop, freezing level around 2500m, no overnight re-freeze expected.
On Thursday, a group of riders remotely triggered a size 1.5 persistent slab after seeing many shooting cracks and whumpfs. See the MIN
report for more details. Several loose wet avalanches (size 1-1.5) were also triggered by riders on steep south facing slopes at treeline. A bit of natural activity, mainly loose avalanches, were observed on steep slopes. With this upcoming warming, natural avalanches are increasingly likely as the sun impacts solar aspects.
The snow surface is getting moist on south and west slopes at lower elevations. Up to 40 cm of storm snow in the last week overlies various surfaces such as old and firm wind slabs in the alpine and open areas at treeline on all aspects. A widespread sun/ temperature crust is also found hidden under this new snow on south facing slopes. Isolated pockets of surface hoar crystals were observed at the surface on north-facing slopes around 2000m right before the last storm rolled in. The mid-snowpack consists of sugary faceted grains (facets) of different hardness. Two older layers of surface hoar still exist down 55-80 and down 95-150 around 1600-1900m. The lower snowpack is generally well-settled.