Follow along here for the latest about Sara on Friday, Nov. 15. A weather system growing more powerful over the central Caribbean was designated Tropical Storm Sara on Thursday, becoming the 18th named storm of what has been a brutal hurricane season for Florida and the Southeast.

Now, all eyes are on Tropical Storm Sara, as it meanders over the western Caribbean Sea through the weekend. From there, its future is very uncertain. Topography over Central America and Mexico will work to tear the storm apart.

The NHC said Tuesday it is tracking a tropical wave in the Caribbean Sea that could become a tropical depression by the end of the week.