Tropical Depression 4 forms deep in the Atlantic

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A weak tropical depression that developed late Wednesday night is moving west-northwestward in the open Atlantic, but it's not looking very healthy. That's where the current tropical depression emerged and the next one is expected to. We are forecasting a mix of sun and clouds, and each day will bring the threat for showers and storms mainly during the afternoon and evening hours. In August, the central and eastern Atlantic starts to become the prime spot for tropical development.

The probability for at least one major hurricane - Category 3, 4 or 5 - making landfall along the entire USA coastline is 62% compared with the 52% average over the last century, researchers said.

The term "tropical cyclone" is an umbrella term that refers to tropical depressions, tropical storms and hurricanes.

Over the next five days, forecasters don't think it will form into a tropical storm. A system must attain top sustained winds of 39 miles per hour to become a tropical storm and 74 miles per hour to become a hurricane.

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June also saw more action than usual. If the storm strengthens, which seems unlikely, it would become Tropical Storm Don.

The National Hurricane Center found a well-defined center of circulation on the disturbance over the Atlantic Ocean.

Klotzbach and Bell also said as a result of the busier season, the odds of a major hurricane impacting the US have gone up.

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