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The number of snow days has been decreasing since the . According to Météo France, there would be **** fewer snow days every 10 years. While in 1963, there were *** days of snowfall, there were only *** in 2017. The same is true for heavy snowfalls (*** meter of snow and more), with a significant falling recurrence over the decade. In 2017, only *** day with more than *** meter of snow on the ground was recorded. The years without heavy snowfall have multiplied since the end of the ***.
This lack of snow in a mid-mountain resort is a high risk for all winter sports tourism professionals where many resorts have to plan for increasingly short snowy seasons.

In order to measure snow cover in the mountain regions of France, Météo France relies on readings recorded at the Col de Porte station, located at an altitude of meters in the heart of the Chartreuse Massif.