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.

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.