The National Hurricane Center will provide its next update on Hurricane Isaias at 5 p.m. ET.
While the storm is heading toward the US, there is still uncertainty about where it will make landfall and how widespread the impacts will be.
Some of the models — like the American Model and European models below — slow the storm down as it impacts Florida. Others move it a little faster, taking it up the coast, into the Carolinas and all the way into New England.