Not talking about Mildura. But in that case unforecast weather caused a couple of issues for Virgin. The bigger issue is that there appears to be a huge gap between BOM guesses on their website and actual aviation forecasts. I've sent them photos in real time of their AWS saying viz 3000m in fog when its actually cavok. They don't give a sh...... and are unaccountable for their folly. Just look at their initial predicated tracks for Cyclone Oma. As it turned out it went the complete other way and this is assuming many computers were used, where in actual fact a chocolate wheel or a TRS80 could have done a better job.