Hurricane Erin has weakened slightly overnight but remains a very strong storm with winds well over 120 mph, making it still a major hurricane. The track remains mostly unchanged. It will start making that northern turn in the next 24 hours.

Green flags lined Fort Lauderdale Beach on Sunday, signaling calm conditions. But as Hurricane Erin approaches, officials say things could change in the coming days.

The Atlantic basin includes the northern Atlantic Ocean, Caribbean Sea and Gulf of America, as the Gulf of Mexico is now known in the U.S. per an order from President Trump. NOAA and the National Hurricane Center are now using Gulf of America on its maps and in its advisories.

5 p.m. Update: Erin is now organizing and strengthening over the Central Atlantic. Erin is expected to become at least a Catgory 3 hurricane but missing Puerto Rico to the north and staying well east of Florida. It is expected to reach Jacksonville’s latitude about early Wednesday, resulting in some rough seas and surf at area beaches next week.

Here's a quick, easy-to-read look on the latest about Tropical Storm Erin, including what Florida residents should be doing.

Tropical Storm Erin is expected to become a strong hurricane by the end of the weekend. How strong will it be and will it impact the U.S.?