Every wave has some chance of developing, all the way from 0% to 100%. Long range forecasting isn't much more than a guessing game. Even during the Cape Verde "season", healthy looking strong waves that come off of Africa fizzle out. And the opposite is also true, almost invisible waves end up developing a week or two later when they get into the Caribbean. The NHC tracks every wave, but that doesn't mean it will ever be anything, in fact most of them never amount to much at all. In other words, the difference between "keep an eye on" and "not to worry" for waves doesn't mean much, particularly that far out.

Bill