You need some sort of Chrome download, I think, to view it. This is of the US, but I imagine those for other continents exist.
My husband says it's helpful to predict how good the birding will be -- something about helping blow the little guys in.
I find it interesting this weekend, when it shows wind blowing straight up from the Gulf to our St. Louis area. Yesterday was up to 94º F here and very humid, not your typical MO May. I also see a diagonal line stretching from TX up through OK, where the Canadian and Gulf winds meet. To my untrained eye this looks like tornado path.