MIAMI (AP) – A depression strengthened into Tropical Storm Harvey on Wednesday as it slowly approached Bermuda, forecasters said.

Harvey, the eighth named storm of the Atlantic hurricane season, had top sustained wind of about 40 mph, just 1 mph above the minimum for tropical storms.

Harvey is the earliest eighth named storm on record for the Atlantic hurricane season, which began June 1.

A tropical storm warning was posted for Bermuda, meaning tropical storm conditions were expected within 24 hours. One to 3 inches of rain was possible for the islands that sit about 1,000 northeast of Miami, meteorologists said.

At 11 a.m. EDT, the tropical storm was centered 215 miles west-southwest of Bermuda, the National Hurricane Center said. It was moving toward the north-northeast at about 10 mph.

The Atlantic hurricane season runs through Nov. 30. The government on Tuesday sharply boosted its forecast for hurricanes this season, predicting the season total would reach 18 to 21 named storms.

That was up from a forecast in May of 12 to 15 named storms.

In years that have seen at least eight named storms, the eighth storm develops, on average, on Sept. 29, said hurricane specialist James Franklin.

“In about half the years, we don’t even get that far,” Franklin said.

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