Tropical Storm Erin has formed on a path toward the Caribbean and is expected to strengthen to a hurricane later in the week as it passes by Puerto Rico. Most models forecast the storm turning upward into the Atlantic Ocean, but a few see the storm continuing onward to the U.S. mainland.

Erin was a tropical storm in the North Atlantic Ocean Wednesday afternoon Eastern time, the National Hurricane Center said in its latest advisory. Erin is the fifth named storm to form in the Atlantic in 2025. Follow our coverage here.