While a curve back out to sea is widely expected and forecast in models, any impacts Erin could have on Florida and the U.S. remains uncertain.

The National Hurricane Center said Tropical Storm Erin is expected to begin strengthening today, Aug. 13 and become a hurricane Friday, Aug. 15, and a strong Category 3 hurricane by Sunday, Aug. 17 as it moves out of an area with dry area and "marginal" sea surface temperatures.

See latest spaghetti models for Tropical Storm Erin. Erin is expected to become a hurricane by the end of the week and a Category 3 storm by Sunday, Aug. 17. What impact Erin will have on Florida is uncertain at this time.