Tropical Storm Dorian could be a hurricane by Tuesday

Tropical Storm Dorian is tracking toward the Caribbean. (Source: MGN)
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(CNN) - Another menacing storm is on track to slam the Caribbean, including Puerto Rico, an island still grappling with the devastation of Hurricane Maria.

Tropical Storm Dorian has intensified in the Atlantic Ocean, whipping 60 mph winds Monday as it churned west toward several Caribbean islands.

A tropical storm watch for Puerto Rico was issued later in the day. A tropical storm watch means that tropical storm conditions are possible within 48 hours.

"Hurricane watches and tropical storm watches and warnings have been issued for parts of the Leeward and Windward Islands, where Dorian is expected move through on Tuesday morning," CNN meteorologist Dave Hennen said.

"The storm is still forecast to be a hurricane as it approaches Puerto Rico and the Dominican Republic on Wednesday and Thursday." It's expected to be a Category 1 hurricane at that point.

By the end of the week, what's left of Dorian is expected to move toward the Bahamas and possibly southeastern parts of the mainland US.
"But it is still way too early to forecast impacts," Hennen said.