Forecasters say Tropical Storm Erin is "moving quickly" as it strengthens and heads toward the western hemisphere, but U.S. weather officials say it's too early to tell what impact it will have.

Forecasters say Tropical Storm Erin is "moving quickly" as it strengthens and heads toward the western hemisphere, but U.S. weather officials say it's too early to tell what…

Tropical Storm Erin is expected to strengthen into a hurricane later this week in the Atlantic Ocean, according to the National Hurricane Center.

For now, most reliable computer models that meteorologists use show Erin curving away from the United States, spinning off the East Coast later in August.

Tropical Storm Erin is still moving quickly westward and is forecast to become a hurricane in a few days over the central tropical Atlantic, the NHC said.

Tropical Storm Erin is slightly intensifying and forecast to become a hurricane Friday with a chance of ultimately affecting the U.S. East Coast next week.

Tropical Storm Erin, now spinning far out in the central Atlantic Ocean, could undergo rapid intensification into a powerful 125-mph hurricane.