Tropical Storm Melissa is expected to bring catastrophic flash flooding and landslides to parts of the Dominican Republic, Haiti and Jamaica.

Tropical Storm Melissa continues to spin in the Caribbean. At the same time, "life-threatening and catastrophic flash flooding and landslides" are expected over portions of Southern Hispaniola and Jamaica through the weekend, according to the National Hurricane Center (NHC).

Dozens of people were already in shelters in the Dominican Republic, and schools, businesses and government agencies were closed.

Melissa is currently the only active tropical system in the Atlantic basin. As of Friday night, the storm remains nearly stationary, drifting north at just 2 mph. Maximum sustained winds are around 65 mph—just below the 75 mph threshold needed to reach Category 1 hurricane status.

At 11 a.m. Saturday, the National Hurricane Center issued an advisory stating that Tropical Storm Melissa is in the Caribbean Sea, 155 miles southeast of Kingston Jamaica and 235 miles southwest of Port Au Prince Haiti. The system, with maximum sustained winds of 70 mph, is moving west-northwest at 1 mph.

Tropical Storm Melissa is expected to strengthen into a hurricane, threatening the northern Caribbean with massive rainfall and life-threatening flooding

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Tropical Storm Melissa is nearly stationary in the central Caribbean, with forecasters warning it could soon strengthen and brush past Jamaica as a powerful hurricane.