(RNN) - Tropical Storm Irma continues its westward trek as it builds strength in the tropical Atlantic, and it is one for the mainland U.S. to watch.
As of the 5 a.m. advisory from the National Hurricane Center, Irma was located at 590 miles west of the Cabo Verde Islands, moving west at 12 mph with 70 mph sustained winds - very close to hurricane strength.
Interests in the U.S. will likely need to keep an eye on the storm's progress.
A west-northwestward motion is expected Thursday, followed by a generally westward motion on Friday.
Since Irma is located so far out in the Atlantic, no watches and warnings have been issued yet.
Forecasters said Irma will turn toward a slightly south of westward heading in a couple of days, and it will be a major hurricane by the time it reaches the eastern Caribbean early next week.
The U.S. is still coping with Harvey, now a tropical depression.
Weather related to Harvey has claimed at least 30 lives and flooded a major metropolitan area with catastrophic, record-breaking rainfall that has driven thousands from their homes.
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