With Super Typhoon Megi now heading toward Hong Kong in southern China, here’s a little info about typhoons.

A typhoon is a tropical cyclone that develops in the northwestern part of the Pacific Ocean between 180° and 100°E.

For organizational purposes, the northern Pacific Ocean is divided into three regions: the eastern (North America to 140°W), central (140°W to 180°), and western (180° to 100°E).

A Pacific typhoon, then, is a tropical cyclone in the northern Pacific Ocean west of 180°.

Within the Northwestern Pacific there are no official “typhoon seasons” since tropical cyclones form throughout the year.

The majority of storms form between May and December while the minimum is between January and April.

The Northwestern Pacific features some of the most intense tropical cyclones on record.