The National Hurricane Center is monitoring two disturbances in the Atlantic Ocean for potential tropical development. Hurricane Erin has officially become post-tropical off the east coast of the United States,

The National Hurricane Center is tracking a system in the Atlantic Ocean south of Bermuda, which could become the next named tropical storm, Fernand.

The first area has been under the eyes of the National Hurricane Center for a few days as it emerged off Africa’s west coast.

Rough surf conditions and dangerous rip currents have forced many beaches to ban swimming and boogie boarding this week.

The Suffolk County Department of Health Services said Atlantic beaches in Suffolk County would remain closed to swimmers through Saturday morning due to hazardous rip currents from the storm that are expected to remain over the weekend. Earlier in the day, the department had said the closures would last until Saturday night.

New York and New Jersey — along with most East Coast states — are facing threats of life-threatening rip currents and massive waves from Hurricane Erin as the massive Category 2 cyclone creeps continues to churn off the coast.

With thousands of miles of ocean water above the 80-degree Fahrenheit (27-degree Celsius) temperature needed to fuel hurricanes, Cape Verde storms are some of the most dangerous that threaten North America. About 85% of all major hurricanes — Category 3 and higher — start out there, according to the National Hurricane Center.