What directions(north, east, west, south)would an all out nuclear exchange come from between Russia vs USA?

It would seem to me, that north and central land based icbm nuclear missles in usa and russia would go over the arctic. but ofcourse there are sea and air carried nukes too, and russian and us nuke icbm ground based outside of either country(?). it would be good to see a map or video that had arrows, etc where all this horrible stuff is coming from, god forbid!