PUERTO RICO — (CNN) — Tropical Storm Dorian is expected to strengthen into a hurricane by Wednesday morning and bring wind, rain and storm surges to the Lesser Antilles and Puerto Rico over the coming week.
A tropical storm watch has been issued for Barbados, which means that tropical storm conditions are possible there within about 48 hours.
In addition, watches and warnings for the Windward and Leeward Islands probably will be required later today, and Puerto Rico and Hispaniola should monitor the storm’s progress, the National Hurricane Center said.
With maximum sustained winds of almost 40 mph, Dorian is moving west at almost 13 mph. It is expected to continue that way Sunday and then move west-northwest on Monday and Tuesday, the NHC said.
Wind shear and dry air are limiting the storm’s ability to organize and strengthen. But as Dorian moves into warmer waters, weaker wind shear will allow it to strengthen over the coming days.
The tropical storm could develop into a Category 1 hurricane, which means winds between 74 and 95 mph, overnight Tuesday into Wednesday.
The cone of probability that shows Dorian’s expected path takes it just west of Puerto Rico. That still would affect the island but be less damaging than a direct hit.
Dorian is the fourth named storm of this hurricane season. Generally, hurricane season reaches a peak in the eight weeks surrounding September 10. Two-thirds of all the storms produced in a typical season occur during this period.
That is because conditions in the tropics become prime for storm development. Typically, by the end of August, water in the tropics have warmed in many places to at least the mid-80s. Also, wind shear across the Atlantic starts to weaken, allowing for storms to develop.
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