Hurricane Sam has strengthened to a Category 2 storm Friday night and is expected to become a major hurricane Saturday, according to the National Hurricane Service.
Hurricane Sam had maximum sustained winds of 100 mph as it moved west-northwest at 12 mph over 1,200 miles east-southeast of the northern Leeward Islands, according to the latest NHC advisory.
Sam was expected to reach the status of a major hurricane by Saturday. Sam is a small hurricane, with hurricane-force winds that extend outward up to 15 miles from the center and with tropical-storm-force winds that extend outward up to 60 miles. South Florida or the United States is not expected to be impacted by the system.
Meanwhile, Subtropical Storm Teresa formed Friday in the Atlantic and had winds of 45 mph as it moved northwest at 10 mph 140 miles north of Bermuda. It's not expected to strengthen much and is forecast to dissipate in two days.
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Teresa is the 19th named system of the season, topping the average of 14 for an entire year. The seven named hurricanes tied the average for a given season, while the three major hurricanes are on average for an entire season.