(CNN) — Tropical Storm Chantal barreled into the eastern Caribbean Tuesday, threatening to bring torrential rains and dangerous waves.
As of 2 p.m. ET Tuesday, Chantal was about 335 miles (540 kilometers) southeast of San Juan, Puerto Rico, the National Hurricane Center said. The storm was headed west-northwest at 29 mph.
A projection map shows Chantal brushing Puerto Rico and slamming into the Dominican Republic and Haiti on Wednesday.
Chantal packed maximum sustained winds of 65 mph (100 kph) on Tuesday afternoon, and the winds may strengthen slightly before the storm hits Hispaniola, the hurricane center said.
A tropical storm warning is in effect for Dominica, Martinique, Guadeloupe, Puerto Rico, the entire coast of the Dominican Republic and the northern coast of Haiti. A hurricane watch is in effect for part of the Dominican Republic, from Barahona to Samana.
Chantal is expected to dump 3 to 6 inches of rain over Puerto Rico, the U.S. Virgin Islands and portions of the Dominican Republic and Haiti. Some parts could see as much as 8 inches.
In addition, a storm surge could raise water levels as much as 2 to 4 feet above normal tide in the southern Dominican Republic. Dangerous waves will accompany the surge, forecasters said.