We have satellites doing centimeter-level laser altimetry with millimeter-level orbit determination flying around the globe every few hours measuring ocean height. When the data from those no longer correlates with the amount of greenhouse gasses in the atmosphere, I will stop concerning myself with AGW. Same goes for the glacier ice levels.
Until then, you can talk about how much snow or the local temperature until you get bored. AGW doesn't try to predict any of those. It predicts that the amount of GHGs in the atmosphere will increase the temperatures of the global climate (over decades). All the other anecdotes are secondary.