Forecasters at the National Hurricane Center gave a system of low pressure near Puerto Rico a 40 percent chance of becoming a tropical cyclone during the next 48 hours.
The system, about 200 miles southeast of San Juan, Puerto Rico, became more concentrated Wednesday morning and conditions appeared favorable for development before it moved above Hispaniola and Puerto Rico, forecasters said. It was moving northwestward at 10 mph.
The system was forecast to bring heavy rainfall and gusty winds to the Leeward Islands, Virgin Islands, Puerto Rico, and Hispaniola during the next few days.
Another system above the Yucatan Peninsula had a 20 percent chance of becoming a tropical cyclone during the next 48 hours.
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