Meteorologists say Tropical Storm Katia has become a hurricane with winds of around 75 miles per hour.
The Category 1 storm is still out in the middle of the Atlantic Ocean and heading west.
Forecasters say it's too early to tell if Katia will make landfall in the U.S. or elsewhere.
"It's got a lot of ocean to go. There's no way at this point to say if it will make any impacts, let alone when it might make them," said Dennis Feltgen, a meteorologist and spokesman at the National Hurricane Center.
"There's a reason we don't do forecasts more than five days in advance-the information just isn't good," he explained. "The error beyond that just isn't acceptable."
Meanwhile, forecasters say they're also keeping an eye on a possible tropical depression that appears to be forming in the Gulf of Mexico. They predict the system will likely become a tropical storm over the next couple of days.