Tropical storm Alberto lies in wait for the Volvo Round the World race fleet, threatening a potentially boat-breaking reception to leg seven across the Atlantic from Florida to Portugal.
The six-strong fleet left Miami in almost windless conditions which restricted speeds to just a few knots but that was all set to change with Alberto expected to bring winds of over 80 kilometres an hour.
The race is tightly poised with overall leaders Team Telefonica, protecting a seven-point advantage over French boat Groupama.
Just 14 points separates the leading four boats, with leg wins worth 30 points apiece.
The nine month race is due to finish in Galway in Ireland on July 7th.