This timeline documents all of the events of the 2016 Pacific typhoon season. Most of the tropical cyclones forming between May and November. The scope of this article is limited to the Pacific Ocean, north of the equator between 100°E and the International Date Line. Tropical storms that form in the entire Western Pacific basin are assigned a name by the Japan Meteorological Agency. Tropical depressions that form in this basin are given a number with a "W" suffix by the United States' Joint Typhoon Warning Center. In addition, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) assigns names to tropical cyclones (including tropical depressions) that enter or form in the Philippine area of responsibility. These names, however, are not in common use outside of the Philippines.
During the season, 50 systems were designated as Tropical Depressions by either, the Japan Meteorological Agency (JMA), the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), the Joint Typhoon Warning Center (JTWC), or other National Meteorological and Hydrological Services such as the China Meteorological Administration and the Hong Kong Observatory. As they run the Regional Specialized Meteorological Centre for the Western Pacific, the JMA assigns names to Tropical Depressions should they intensify into a tropical storm. PAGASA also assign local names to tropical depressions which form within their area of responsibility; however, these names are not in common use outside of PAGASA's area of responsibility. In this season, 14 systems entered or formed in the Philippine area of responsibility, which 7 of them directly made landfall over the Philippines.
Timeline of events
January
January 1
The 2016 Pacific typhoon season officially begins, though no systems have developed for the course of five months.
May
May 25
18:00 UTC at — Tropical Depression 01W develops from an area of low-pressure over in the South China Sea.
May 27
06:00 UTC at — Tropical Depression 01W reaches peak intensity with a minimum pressure of 1000 hPa while making landfall near Yangjiang, Guangdong. 18:00 UTC at — Tropical Depression 01W weakens to a low-pressure area inland China.
June
June 25
18:00 UTC at — Another tropical depression develops in the South China Sea to northeast of Samar.
June 26
06:00 UTC at — The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) starts initiating advisories on the depression, receiving the local name Ambo while it was located about to the east of Virac, Catanduanes. 06:00 UTC at — The JMA follows suit and starts initiating advisories on Tropical Depression Ambo. 14:00 UTC at — Tropical Depression Ambo makes landfall over in Dinalungan, Aurora. The PAGASA in the same time downgraded Ambo to a low-pressure area and stopped warning on the system.
June 27
00:00 UTC at — Tropical Depression Ambo enters the South China Sea.
June 28
00:00 UTC at — Tropical Depression Ambo makes landfall over in Guangdong as it was absorbed by a stationary front. The JMA stops tracking on the system.
July
July 2
12:00 UTC at — A tropical depression has developed approximately to the southeast of Yap State.
July 3
00:00 UTC at — The Joint Typhoon Warning Center (JTWC) starts initiating advisories giving the designation of 02W as it was located about south of Guam. 00:00 UTC at — The tropical depression intensifies into a tropical storm, with the JMA naming it as Nepartak. 03:00 UTC at — The JTWC upgrades Nepartak to a tropical storm as it was located about northeast of Faraulep.
July 4
12:00 UTC at — Nepartak intensifies into a severe tropical storm by the JMA.
July 5
00:00 UTC at — According to the JMA, Nepartak strengthens into a typhoon. 03:00 UTC at — The PAGASA starts issuing advisories on Nepartak, which was also given the local name Butchoy as it was located about east of Baler, Aurora. 03:00 UTC at — The JTWC now classifies Nepartak (Butchoy) as a Category 1 typhoon about southeast of Taipei, Taiwan. 06:00 UTC at — Typhoon Nepartak (Butchoy) intensifies into a Category 2 by the JTWC. 12:00 UTC at — Typhoon Nepartak (Butchoy) undergoes rapid deepening and was quickly upgraded to a Category 4 typhoon with located about east-southeast of Taipei, Taiwan. 18:00 UTC at — Nepartak (Butchoy) further strengthens into a Super typhoon with winds of located about southeast of Taipei, Taiwan.