HOUSTON — The third named storm of the Atlantic Hurricane season has formed. Chantal is just off the East Coast of the United States. With the 7 a.m. update, Chantal had maximum sustained winds of 40 miles per hour and was moving to the north at two miles per hour.

A tropical storm watch stretches along the coast from Edisto Beach, S.C., to the South Santee River. The hurricane center said those elsewhere along the southeast coast of the United States should also keep an eye on Chantal. Chantal is expected to track slowly to the north and then northwest and move onshore in South Carolina by Sunday morning.

A disturbance off the coast of the southeast United States – east of Florida, near Georgia and South Carolina – became better organized Friday to become Tropical Depression 3. It was previously known as Invest 92L.