As of 2:05pm update there is an 80% probability posted regarding 91L.

It is way too early to assess what impacts this would have on interests at home, but for the Islands ..particularly the Leewards, it would be wise to cover this feature closely. The deep layer analysis shows only minor packages of shear and a generalize deep layer easterly flow during a positive phase of Atlantic subtropical ridge strength. There is also the appearance of a developing U/A anticyclone in the vicinity of 91L. These observations, in general, should provide for a favorable intensification arena for 91L.

One note, 91L is above normal in circulation mass. These types of large systems tend to develop at a slower rate.