I am trying to compare weather station data (North Head in Sydney) to various weather models. I have downloaded the axf file with the last 72 hours of observations. I have then downloaded gribs using Expedition. Using the recommended time gives me 7.5 hours of observations that overlap with the gribs. When I then run "Analyse" I get the message: "Not enough data to analyse in XXXX" where XXXX is the name of one of the models. Removing that model from the list gives the same result for the next model in the list. What am I missing?