Tropical storm conditions are possible in Dominica and Guadeloupe tonight, the NHC said.
Although Beryl has dissipated, its remnants are producing locally heavy rainfall and strong gusty winds over the northeastern Caribbean Sea and the northern Leeward Islands.
Though the storm is far from the strength of major Hurricanes Maria and Irma past year, Beryl still posed a threat of wind and rain to areas that have not fully recovered from those destructive storms.
The storm crossed directly over Dominica more than nine months after Hurricane Maria hit the island as a Category 5 storm and killed dozens of people.
McNoldy noted the simultaneous presence of two July tropical storms, Beryl and Chris, hasnt happened since 2011, when Bret and Cindy roamed the Atlantic.
Officials said 24,000 customers had already lost power across Puerto Rico and Gov. Ricardo Rossello urged people without sturdy roofs to move in with relatives or go to one of 14 government shelters that have opened.
The U.S. Virgin Islands, meanwhile, announced that schools and government offices would be closed in St. Croix.
Meteorologist Marshall Alexander told The Associated Press that officials were anxious about people still living with tarps on their roofs after Hurricane Maria. "The system can still cause a lot of damage, regardless of whether it's a tropical storm or a hurricane". It was moving to east-southeast at 2 miles per hour (4 kph).More news: Microsoft Surface Go: a rival to Apple’s iPad?
"We're still not ready to receive another storm", said 17-year-old Ruben Del Moral, who lives in the southeast coastal town of Yabucoa, the first town hit by Hurricane Maria last September.
In its update at 11 a.m. Monday, the National Hurricane Center is predicting the storm off the East Coast to develop into the second hurricane of the 2018 Atlantic season on Tuesday.
Jose Alamo, a meteorologist with the National Weather Service, told The Associated Press that 1 to 5 inches (3 to 13 centimeters) of rain fell across Puerto Rico.
Olga Herrera Carrasquillo and Ramon Llanos Arboleda, who live together in Humacao in the southeastern region of Puerto Rico, said FEMA installed a blue tarp over their roof to protect what little they had left.
"Definitely, we were spared the worst", he said.
Chris is about 215 miles south-southeast of Cape Hatteras, N.C., and packing maximum sustained winds of 60 mph.
The U.S. National Hurricane Center said the remnants of Beryl would move south of the Virgin Islands and Puerto Rico on Monday.