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, Figure 1. Yearly total snowfall SF (average 1979-2018) for the ERA5 (a,b) and the E-OBSv20.0e (c,d) data-sets. a,c) NUTS-0 level, b,d) NUTS-2 level

, Symmetric percentage error ? on average snowfall c,d) Correlation coefficient R 2 for the SF daily snowfall time-series for ERA5 and E-OBSv20.0e. a,c) NUTS-2 level, b,d)

, Figure 6. a) Boxplots of the maxima yearly snowfall (SF) for two periods 1979-1998 (red) and 1999-2018 (blue). b) Seasonal analysis for maximum yearly snowfall SF. The polar plots show average maxima yearly snowfall for the two periods (different colors). Each symbol corresponds to a different country

. Montenegro,

(. Bosnia and . Ba, Boxplot of 2-meters temperatures t2m (c) and CAPE (d) observed during extreme snowfall events. For boxplots, on each box, the central mark indicates the median, and the bottom and top edges of the box indicate the 25th and 75th percentiles, respectively. The whiskers extend to the most extreme data points and the outliers are

, Average of convective available potential energy (CAPE) fields ( J Kg ?1 ) during days of yearly maximum snowfall for the periods 1979-1998 (a,d,g) and 1999-2018 (b,e,h). Panels c,f,i) show the differences between the second and the first periods ?CAPE

, Green circles show the location of the most northwestern point of each country

, Average of 2-meters temperature fields ( ? C) during days of yearly maximum snowfall for the periods 1979-1998 (a,d,g) and 1999-2018 (b,e,h). Panels c,f,i) show the differences between the second and the first periods ?t2m, vol.8

, Green circles show the location of the most northwestern point of each country

, Average of sea-level pressure (msl) fields (hPa) during days of yearly maximum snowfall for the periods 1979-1998 (a,d,g) and 1999-2018 (b,e,h). Panels c,f,i) show the differences between the second and the first periods ?msl

, Green circles show the location of the most northwestern point of each country