Timeline of the 2015 Pacific typhoon season

The scope of this article is limited to the Pacific Ocean, north of the equator between 100°E and the International Date Line.

This area, called the Western Pacific basin, is the responsibility of the Japanese Meteorological Agency (JMA).

The Japanese Meteorological Agency (JMA) is also responsible for assigning names to all tropical storms that are formed within the basin.

Also of note - the Western Pacific basin is monitored by the United States' Joint Typhoon Warning Center (JTWC), which gives all Tropical depressions a number with a "W" suffix.

October 11 ● Area of convection persisted approximately 528 km (328 mi) just north of Pohnpei later that day JMA upgraded the system to a tropical depression

Mekkhala making landfall over the Philippines on January 17
Typhoon Higos undergoing rapid intensification
Tropical Storm Bavi at peak intensity on March 14
Track of Typhoon Maysak during late-March
Tropical Depression 05W intensifies into Tropical Storm Haishen on April 4
Typhoon Noul making landfall over the Philippines on May 10
Typhoon Dolphin intensifying on May 16
Three tropical cyclones simultaneously active in the Western Pacific; (from left to right) Linfa, Chan-hom and Nangka on July 7. 2 invests which soon to become Halola and Iune are also visible in the Central Pacific
Typhoon Soudelor weakening with an eyewall replacement cycle on August 6
Track of Tropical Storm Molave during early-August