"The associated shower and thunderstorm activity continues to show some signs of organization, but the system appears to lack a well-defined centre at this time", it said.
A low pressure system churning across the Caribbean has about a 50 percent chance of becoming a tropical cyclone over the next two days, National Hurricane Center forecasters said Monday. Heavy rain and gusty winds are expected there starting late Tuesday.
If it were to muster tropical storm status, it would be named Don.More news: Barcelona will wait for PSG's Marco Verratti until end of transfer - Valverde
The system is expected to run into less favorable upper-level winds after Wednesday, which could keep it from intensifying any more.
The Met Office says the systems lacks a well-defined centre, but continues to show signs of organization as it moves west to west-northwest at about 15 miles per hour (24km/h).
Another wave located about 800 miles WSW of Cape Verde Islands has a low potential of cyclone development.More news: UAE minister responds to hacking claims
Its chance of formation is around 20 percent within the next two days, or 30 per cent in the next five days.
Hurricane Fernanda has continued to build strength in the Pacific Ocean but is heading farther out to sea and does not pose any immediate threat to land.More news: Speeding SUV lands on roof of St. Louis home
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