What the patterns do, depending on which one, is to lop the tops off the incoming storms when they approach the Gulf, and East coast and try to run up the slot or across Florida. It won't stop them from slamming into Central Mexico and it does not always work. Has more to do with low pressure areas replacing the usual high, or the other way around.
It's obvious that the idea that they can predict named storms, much less predict how many will hit the US is a farce.
What is incredible is if a big hurricane comes up against a big front from the western US - there is no competition. The huge fronts over the great plains are giants.