I know I see a lot of talk about the jet stream during winter and am flying in a few days so I am trying to read the jet stream forecast and it is scaring me to death. Is flying IN the jet stream more bumpy or when you fly in and out of it that causes it? For example if you take off in a place in the middle of the jet and stay there is it better or is the jet a problem no matter what? Also is it more turbulent flying against the stream (arrows)? I am flying on Friday and it looks like half the country is covered with the jet so I can't make out what that may mean.