TAMPA, Fla. (Reuters) - Hurricane Alex blasted into the record books on Thursday as the first Atlantic hurricane to form during the month of January in more than three-quarters of a century, U.S. weather forecasters said.

The storm, with wind gusts up to 85 miles an hour (137 kph), was expected to bear down on the Azores islands off the coast of Portugal on Friday, according to the National Hurricane Center in Miami. It did not pose a threat to the United States.

Local authorities issued a hurricane warning for five islands in the central Azores, which could see flash flooding, mudslides and storm surge, said NHC spokesman Dennis Feltgen.

Alex was rated a “Category 1” hurricane, which is the lowest rating on the five-tier Saffir-Simpson hurricane wind scale.

Only two other hurricanes have appeared in January since forecasters began keeping records in 1851, Feltgen said. Hurricane Alice started in December and carried into January in 1955. The last time a hurricane formed in January was 1938.

Still, the early hurricane does not necessarily portend an unusually active storm period during the Atlantic hurricane season from June through November, Feltgen said. That forecast will be determined by weather conditions not yet seen.

“The good news is that even though we have got a hurricane in January, that is not a harbinger of what the 2016 hurricane season will be like,” he said. “It is no reflection.”