These questions have bollox value for real flying knowledge, because those who want / need to know the winds aloft will get them off the internet (from Form 214, GFS, etc) and most real flying to places is done with a GPS / radio nav which gives you continuous lateral guidance, making the winds aloft irrelevant except for total range / fuel requirements computations.
And the winds aloft forecasts are often total bollox anyway. I did some 800nm flights in June, to/from Croatia, on which the forecasts were severely out (e.g. forecasting a 10kt tailwind but actually it was a 10kt headwind).