- The storm could soon be a threat to Haiti, Jamaica, eastern Cuba
- CNN Weather says it 's unclear whether Matthew will hit Florida
By Friday night, the storm took on a Category 5 rating, the strongest in the Atlantic since Felix in 2007, the National Weather Service said.
"Many land areas are at least threatened by the system," said Rick Knabb, director of the National Hurricane Center. "Hurricane hunters are going to be flying in and out of Matthew for days to come."
Knabb noted that south Florida could be threatened next week, but inhabitants had "the luxury of time," and he encouraged people to use it to prepare and buy supplies.
CNN Weather said it is still unclear whether Matthew will hit Florida, where weather models currently have it possibly scraping. But by late Sunday or Monday the dangerous storm should be approaching Jamaica, Haiti and eastern Cuba.
IBC Airways has canceled all flights to and from the American naval station at Guantanamo Bay, Cuba, on Monday because of the approaching storm, the naval station announced via Twitter.
airlines issued travel warnings for their customers, saying change fees can be waived for flights to some destinations.
The storm was a Category 1 storm on Thursday. Early Friday it was re-categorized as a Category 3 storm, before strengthening into Category 4 then 5.
Jamaica Meteorological Service' Director Evan Thomas said he expected the storm to hit the island and said fishermen have been advised to evacuate from the cays and return to the mainland, the Jamaica Observer reported
US hurricane forecasters predicted rainfall totals between 10 and 15 inches in Jamaica, with some areas getting as much as 25 inches. Southern and southwestern Haiti also are due for drenching rains, forecasters said.