guys guys... the key is 24-hour DYNAMIC picture of the situation....
it takes into account flight planned flights, airborne times, taxiing times and clearly the weather is implicitly factored in. Obviously, we wouldn't be using that to predict the traffic 10 hours down the line... that would be plain stupid.
But I can tell you that in UK area centres it gives a fairly good picture of what's going to happen in the next 30-45min... and if you want to know what's going to happen in 1:30-2hr ... you just wait and have a look at it again 60min later
