MIAMI (AP) — Tropical Storm Bertha made landfall on South Carolina’s coast Wednesday morning shortly after it formed, becoming the second named storm before the official start of this year’s Atlantic hurricane season.

A tropical storm warning was issued for South Carolina’s coast and the storm was expected to bring heavy rainfall, the U.S. National Hurricane Center said.

The storm was centered about 40 miles (65 kilometers) northeast of Charleston, South Carolina, and was moving north near 15 mph (24 kph).

Earlier this month, Tropical Storm Arthur brought rain to North Carolina before moving out to sea.

It was the sixth straight year that a named storm has developed before June 1, the official start of the Atlantic hurricane season.