Published: Sep 21, 2010 3:59 PM EDT
Updated: Sep 21, 2010 1:00 PM EDT

MIAMI (AP) - Tropical Storm Lisa has formed far out over the Atlantic Ocean, becoming the 12th named storm of the season.

The storm has maximum sustained winds near 40 mph (65 kph) early Tuesday with some additional strengthening forecast during the next few days.

Lisa is located about 530 miles (850 kilometers) west-northwest of the Cape Verde Islands and is moving north near 5 mph (7 kph), with a turn to the north-northwest expected later.

Meanwhile, Hurricane Igor is barreling northeastward toward Canada, after leaving behind power outages, grounded boats and downed trees in Bermuda and kicking up dangerous surf on the U.S. Atlantic coast.