Tropical Storm Humberto is expected to strengthen into the first hurricane of the Atlantic storm season, according to experts at the U.S. National Hurricane Center in Miami.

Humberto formed near the Cape Verde Islands on Monday, and the storm has topped sustained winds of 40 mph. It was centered 105 miles south of the island of Praia in Cape Verde, according to Reuters.

Heavy wind and rainfall has hit southern Cape Verde, a small rocky island off the north African Coast with a total population of approximately 531,000.

Humberto was last seen moving west and is expected to move north over open waters later this week.

The U.S. National Hurricane Center predicts the hurricane will have sustained winds of at least 74 mph by Sept. 11.

The U.S. is not expected to feel the effects of the hurricane however according to Reuters.

Humberto is the eighth tropical storm of the 2013 Atlantic-Caribbean hurricane season. The Atlantic Hurricane season runs from Jun. 1 through Nov. 30.

On average, the first hurricane of the season usually forms by Aug. 10. The latest a first hurricane has formed was Hurricane Gustav on Sept. 11, 2002.

If Humberto forms into a hurricane it would replace Gustav as the modern-day record holder, according to the U.S. National Hurricane Center.

The storm is 3,500 miles away from Miami.

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