Just because they scheduled a recon flight does not mean it will actually happen. Invest or not the NHC must think that there is some possibility, however remote, (as stated by several other posters in this thread) of a tropical system forming. Who knows, they may be holding their finger over the invest trigger right now. Recon is scheduled for early afternoon on Friday, they have plenty of time to cancel.

EDIT: Just after I submitted this I see that we have 94L, they did have their finger over the invest trigger

Bill