USNHCNHC chart showing Tropical Storm Jose gathering behind Hurricane Irma
Tropical Storm Jose, the 10th named storm of this year’s Atlantic hurricane season, has formed over open seas.
The US National Hurricane Center (NHC) said the storm is around 1505 miles (2420 km) east of the Lesser Antilles with maximum sustained winds of 40 mph (65km/h).
The fresh warnings were issued by the Miami-based weather forecaster as tens of thousands of people braced themselves for the arrival of Hurricane Irma.Related articles
Irma has become an extremely dangerous Category 5 hurricane
Irma was reclassified as a highly dangerous Category 5 storm - the highest NHC designation - as it hurtled toward the Caribbean and the southern US while Texas and Louisiana still reel from devastating Hurricane Harvey.
Hurricane warnings are in effect for much of the Leeward Islands, the British and US Virgin Islands and Puerto Rico as Irma packs sustained winds of up to 175mph (280km/h).
An NHC spokesman said: "Irma has become an extremely dangerous Category 5 hurricane.