(CNN) -- As Tropical Storm Igor spins across the Atlantic Ocean, forecasters say the storm will probably strengthen and become a hurricane later Saturday.
At about 4 a.m. ET, Igor was about 915 miles (1,475 km) west of the Cape Verde Islands, according to the National Hurricane Center in Miami, Florida. It packed winds of up to 70 mph (110 kph) and was headed west at about 21 mph (33 kph).
Igor is expected to continue heading west in the Atlantic Ocean and could affect Caribbean islands by Thursday.
CNN
