Bonsoir Mizar , oui il semble que le 20 cm est de plus en plus probable , j'ai trouvé ceci sur un autre forum venant du GFS en version texte. The following derived from http://charlie.wxcaster.com/ Station ID: CYUL Lat: 45.46 Long: 73.75 CYUL Montr�al-Pierre Elliott Trudeau International Airport - Montreal, Quebec GFS Model Run: 12Z 23DEC 2017 ============================== HR Valid 2m Tmp 2m Dpt TPrcp PRS WX Max Min Snowfall Deg F Deg F in. TEXT Tmp Tmp in _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ n_ PCPN SNOW 45 12/25 09Z 14 13 0.06 -SN 14 12 1.3 0.06 1.3 48 12/25 12Z 17 16 0.19 -SN 17 12 3.4 0.25 4.7 51 12/25 15Z 16 15 0.11 -SN 17 16 2.1 0.36 6.8 54 12/25 18Z 15 13 0.05 -SN 17 15 0.9 0.41 7.7 57 12/25 21Z 16 15 0.02 -SN 17 15 0.3 0.43 8.0 60 12/26 00Z 15 13 0.01 -SN 18 15 0.2 0.44 8.2 63 12/26 03Z 14 12 0.00 15 14 0.0 The following derived from http://charlie.wxcaster.com/ Station ID: CYQB Lat: 46.79 Long: 71.38 CYQB Qu�bec City Jean Lesage International Airport - Quebec City, Quebec GFS Model Run: 12Z 23DEC 2017 ============================== HR Valid 2m Tmp 2m Dpt TPrcp PRS WX Max Min Snowfall Deg F Deg F in. TEXT Tmp Tmp in _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ n_ PCPN SNOW 45 12/25 09Z 10 5 0.01 -SN 11 10 0.2 0.01 0.2 48 12/25 12Z 10 6 0.01 -SN 12 9 0.2 0.02 0.4 51 12/25 15Z 10 7 0.05 -SN 10 9 0.9 0.07 1.3 54 12/25 18Z 12 9 0.08 -SN 12 9 1.7 0.15 3.0 57 12/25 21Z 12 11 0.07 -SN 12 12 1.4 0.22 4.4 60 12/26 00Z 11 11 0.04 -SN 12 11 0.8 0.26 5.2 63 12/26 03Z 9 8 0.01 -SN 12 9 0.3 0.27 5.5 66 12/26 06Z 3 1 0.00 -SN 12 3 0.0 69 12/26 09Z 1 0 0.00 3 0 0.0