This is a good example of our typical Weather pasterns, particularly at this time of the year.
Low level air moves around the North Atlantic in a clockwise direction. . . .Which becomes the Easterly Caribbean wind we usually see at surface level.
The higher level air also moves from Africa, along the Equator from the East. . .. But every now and then, it swells up in ITCZ activity Pink areas .. From those, in the Pacific, often just off Panama but also from the Central Pacific. . . . .
These very high level winds then spread out North and South of the Equator, or perhaps I should call that the SUN's effective Equator, because this line moves northwards during our Summer and southwards during our Winter. . . .
But these high level winds then move northwards and southwards, and in doing so, then move towards the East in both cases. . . . Thus forming the high level SW winds over North America and Europe and NW winds over South America. . . . .
[ Confusing a bit, we talk about Easterly Tides, because the sea is moving To the East, but Easterly Winds mean it is coming From the East ]