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Tropical Storm Bertha is moving northwest, taking aim at Puerto Rico and expected to skirt the Dominican Republic's coast.

The National Hurricane Center has issued a tropical storm warning for Puerto Rico, St. Lucia, Dominica, Martinique, and the U.S. and British Virgin Islands, while the Dominican Republic has issued a tropical storm watch.

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Luckily, forecasters with the Hurricane Center say upper level winds are not favorable for further strengthening, so maximum sustained winds should remain at about 50 mph.

The long-term forecast calls for Bertha to keep moving west, but at some point curve back — missing the U.S. East Coast and cruising off into the Atlantic Ocean.

The Associated Press adds:

"Bertha is expected to generate up to 3 inches of rain across the eastern and northern Caribbean, with isolated amounts of up to 6 inches in certain areas."Officials in Puerto Rico are welcoming the rainfall amid a moderate drought that has hit the island's southern region and a small portion in the northeast. More than half of the U.S. territory also is experiencing abnormally dry conditions, with the government reporting $20 million in crop losses."Strict rationing measures are scheduled to go into effect starting Aug. 6 if the storm doesn't generate enough rain."Copyright 2016 NPR. To see more, visit http://www.npr.org/.