Overall the weather has been significantly different the past couple of years. Prior to that we had regular thunderstorms/lightning, at least a lot over the ocean, but weather like that has been noticeably absent. I would say that the majority of the changes have occurred since after Hurricane Matthew.
What seems a bit ominous, however, is the very hot weather which began suddenly about 3 weeks ago. Despite the non-alarmist forecasts for the Caribbean, my opinion is that there will be some serious hurricanes somewhere in this region. Certainly not what Haiti needs, as things have not recovered from the previous storms (let alone the 2010 earthquake) and the population is as vulnerable as ever.
We can only wait.