Tropical Storm Arlene formed in the north Atlantic Thursday, becoming the first tropical storm of 2017, officials with the National Hurricane Center in Miami said.
The storm was about 815 miles west of the Azores Thursday afternoon, with maximum sustained winds of 45 mph.
The system is forecast to dissipate either Thursday night or sometime Friday, NHC officials said.
There were no watches or warnings in effect. The Atlantic Hurricane Season doesn't officially start until June 1.