The circulation behind departing (or looping?) extratropical Harvey and an upper level low near 33N 31W are building a ridge southward along 55W. This will place TD Irene under some northerly shear. An upper level high (300mb) is expected to cut off near 20N 60W. If Irene can survive the shear it will be interesting to see if this developing ridge will force her on more of a westerly or even west southwesterly course for the next two or three days. The shear is forecast to slowly weaken and the dry air ahead of her to modify with time. If she can survive the next couple of days, Irene could be around for quite some time.
Cheers,
ED