Tropical Storm Erin is expected to start to gain strength starting on Wednesday and will likely become a hurricane either Thursday or Friday.

Tropical Storm Erin has begun strengthening as it streaks west across the Atlantic and is on track to reach hurricane status as soon as Friday, prompting tropical storm watches in the northern ...

Tropical Storm Erin is beginning to strengthen and could become a strong Category 3 storm with 125-mph winds within five days.

Tropical storm vs hurricane A tropical storm forms when a low-pressure area spins up thunderstorms that produce circular wind flow with maximum sustained winds of 39 mph, according to NOAA.

Here's a look at where Tropical Storm Erin is, where it's headed and when it might curve out to sea.

Tropical Storm Erin is forecast to become a hurricane within the next 24 hours or so as it heads west-northwestward toward the continental U.S.

Tropical Storm Erin is beginning to strengthen and could become a strong Category 3 storm with 125-mph winds within five days.

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

Erin is expected to become a hurricane Friday, Aug. 15 and a major hurricane by Sunday morning. What Florida can expect from the storm.

Tropical Storm Erin is expected to strengthen, but will the storm be a direct hit to Delaware and the East Coast? See models, the latest updates here.