Tropical Storm Leslie is now a potential threat to Bermuda.An advisory issued by the Bermuda Weather Service gives its closest point over the next 72 hours as 273 nautical miles to the south, south east of the Island, at noon on Thursday.Forecasts predict the storm will have become a Category One hurricane by that time.Tropical Storm Leslie is currently said to be 482 nautical miles south of Bermuda with gusts of 50 knots.