Global warming deniers often point to the inaccuracy of daily weather forecasts as a reason that global warming can only be considered a wild theory, at best. "How can they be right about climate, when they can't even tell you what the weather will be like next week?", they say. For instance, in Canada, our national forecasting agency got it terribly wrong this summer. In making their seasonal forecast, they looked at the ocean water on the West Coast and in the Labrador Sea. Chief cli...