The one I use is most is Accu-Window. If the trees are blowing outside my office window and my fellow riders don't answer their phone, then I am going because I know they are already riding.
The best thing most of us do is check on all the websites and make our own accurate prediction or best guess, just like Josh Linker.
Try learning how to read weather patterns, understanding how High Pressure and Low Pressure with pressure gradiants work.
This might not be the best source for those maps but it's a start.
http://adds.aviationweather.gov/winds/