Tropical storm and hurricane alerts issued for Jamaica and the Cayman Islands

A broad area of low pressure in the western Caribbean Sea is becoming better organized, and the National Hurricane Center is initiating advisories on the system as of 4 p.m. Sunday.
The disturbance is being called Potential Tropical Cyclone Eighteen, a designation used by the National Hurricane Center to mark a system that has not yet met the criteria for a tropical depression or storm but is expected to bring impacts to land within the 48-hour window that requires alerts to be issued.