Korina thanks !! Let me ask you 2 more please ... what is the difference between the reference time and the forecast time ? Im in eastern canada , the reference time shown is changing twice a day at 00:00:00z (19Hr) and 12:00:00z(7HR). However ECMWF seems to update twice a day at 3am and 3 pm eastern time . Even if I convert the forecast time reference time and reference time , the hours dont match . Last question. For the total new snow, should I really look at the reference time or at the last update of the forecast time for the most accurate reference ? Thanks !!!!