The 2007 Pacific typhoon season had no official bounds; it ran year-round in 2007, but most tropical cyclones tend to form in the northwestern Pacific Ocean between May and November. These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean.
Other articles related to "timeline of the 2007 pacific typhoon season":
... There was no tropical storm activity in the Western North Pacific basin in December. ...