The last week of this strange winter season was mostly variable with occasional rainfall which have wet the snowpack and greatly reduced its thickness.
The snow quality was good especially during the weekend (24-25 April), with melt-freeze crusts which were getting softer and nicer to ski with the daily warming. With the rain on April the 26th, the snowpack gradually got wetter and the quality of skiing deteriorated, and remained so for the remaining days of the week.
SNOWPACK STABILITY AND AVALANCHE OBSERVATIONS
Below 2400-2500 m, the snow cover is wet or moist already in the morning; in particular along Northern slopes, generally medium sized, wet snow avalanches will be likely. Since the afternoon of May the 1st, with the rain, the danger related to wet snow will further increase. Above 2400-2500 m, generally small sized, unstable snow-drift accumulations formed; which will increase in sizes and numbers. Mainly on April the 26th, we recorded several wet snow avalanches, small and medium sizes; these affected mainly Northern slopes which were getting wet for the first time. Even on April the 30th, a few wet snow avalanches were recorded, again mainly along Northern slopes. The avalanche danger level fluctuated between 1-Low and 2-Moderate until April the 29th, then, due to the rainfall, rose to 3-Considerable along all the elevations.
In the alpine, the snow surface is wind affected, close to the ridges and along the more wind exposed slopes, the snow surface is hard; above 2400-2500 m, along leeward slopes, small sized wind slabs and loose snow alternate each others. Below 2400-2500 m, the snowcover is often moist or wet down to the ground. Along Southern slopes, there is little or no snow.
The days were mostly variable with sunny periods alternating with more cloudy moments. On April the 26th and April the 30th, there was light rain, snowy only above 2200-2400 m. We recorded light Southern winds, with some strengthening on April the 30th.
Wet snow instability index - Gessi station with the simulated data of Meteoblu, North aspect