Tropical Storm Erika was around 390 nautical miles east of Antigua on Wednesday morning and is moving west at around 18mph. The storm is expected to track close to Puerto Rico and the Lesser Antilles on Thursday and then towards the Bahamas or South Florida by the end of the weekend, by which time Erika will probably have developed into a Hurricane.
The official guidance from Miami is for Erika to gradually strengthen to a category 1 Hurricane by the start of next week. Erika will be the second Hurricane of the 2015 season, and potentially, as it strengthens further it could be the first category 3 to hit the mainland of the United States for 10 years (Hurricane Katrina).
As well as potentially damaging winds, Erika is likely to produce very heavy rainfall and a modest storm surge.
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