Katia becomes category four hurricane: NHC
At 11:00 p.m. ET (0300 GMT), Katia was located about 450 miles south of Bermuda and was packing winds of 135 miles per hour (215 km/h), NHC added.
"Some fluctuations in strength are possible during the next 24 hours, followed by slow weakening," the NHC said.
The hurricane was presently moving toward the northwest near 10 miles per hour (17 km/h) and this general motion was expected to continue through Wednesday.
Forecasters expect the hurricane to veer away from the U.S. east coast later this week and then head northeastwards out to the open sea.
(Reporting by Naveen Arul in Bangalore; Editing by Himani Sarkar)