The National Hurricane Center is monitoring a tropical wave that has emerged off of the west coast of Africa, but as of Monday forecasters were giving it a "medium" chance to develop into a tropical storm or hurricane.
The wave was about 400 miles east-southeast of the Cape Verde Islands.
The Hurricane Center said thunderstorm activity associated with the system had increased and become better organized.
"Environmental conditions are expected to be favorable for development over the next day or so before becoming less conducive later in the week," the Hurricane Center said at 2 p.m. EDT.
The system has a 30 0 percent chance of becoming a tropical cyclone within the next 48 hours, the Hurricane Center said