The possible investigationyou reference is the ECarib feature. The interest in these items stems from persistence in the WCarib, and better signature in the ECarib, meaning that if something tropical develops it will do so more quickly there, than in the W Carib, where the weather features effecting development are more sharply defined; i.e. a narrow sharp trough/ upper low to the nw over the western Yucatan and a very narrow ridge between that upper low feature and the one just ahead of the Ecarib feature, which upper low is just south of Hispanola.
I think the trough to the nw of the Wcarib feature will erode over the next few days and the ridge will build and if a low develops it will come from the tropical flow coming off the northern SA coast and will likely deepen near Hondouras to the point where there may be an invest there in a few days.

But that is just me thinking out loud.