Extensive discussion: https://news.ycombinator.com/item?id=7925777
This one is about the accuracy of three weather forecasting methods and how far into the future they can predict the temperature.
But they are talking about the same problem, giving related data, posted the same day, and clearly related. So I think the cross-reference is valid, and the discussion on the other submission is appropriate.
But it's true that they are definitely different articles.