Most of the tropical cyclones of the 2013 Pacific typhoon season formed between May and November of that year. The scope of this article is the Pacific Ocean north of the equator, between 100°E and the International Date Line. Tropical storms which form in the Western Pacific basin are assigned a name by the Japan Meteorological Agency (JMA). Tropical depressions forming in this basin are given a number with a "W" suffix by the United States' Joint Typhoon Warning Center (JTWC). 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, but these names are not in common use outside the Philippines.
During the season, 51 systems were designated as tropical depressions by the JMA, the PAGASA, the JTWC or other national meteorological and hydrological services, such as the China Meteorological Administration and the Hong Kong Observatory. Since it runs the Regional Specialized Meteorological Centre for the western Pacific Ocean, the JMA assigns names to tropical depressions if they intensify into a tropical storm. PAGASA assigns local names to tropical depressions which form within its area of responsibility. During this season, 25 systems entered (or formed) in the Philippine area of responsibility; 11 made landfall over the Philippines.
October was the most active month, with nine systems formed or active: eight typhoons and one weak storm. Three storms (Pewa, Unala and 03C) entered the Western Pacific basin in August. In early October and early November, two tropical depressions crossed the 100th meridian; one became Cyclone Phailin, the first cyclone since Cyclone Jal in 2010. Similar to October, in August 13 storms were counted by the JMA. Typhoon Haiyan, the strongest storm of the season, formed on early November, before rapidly intensifying and making landfall in the Philippines with estimated 1-minute sustained wind speeds of up to 190mph (305kph), which made it the strongest storm to make landfall based on sustained wind speeds at that time.
Timeline of events
January
January 1 00:00 UTC – The JMA and the CMA report that a tropical depression, has developed about to the southwest of Hagåtña, Guam.
January 3 0300 UTC – PAGASA names the tropical depression that the JMA are monitoring; Auring. 12:00 UTC – The JMA, CMA and PAGASA all report that Tropical Depression Auring, has intensified into a tropical storm with the JMA naming it Sonamu. 12:00 UTC – The JTWC initiates advisories on Tropical Storm Sonamu (Auring) and designates it as Tropical Depression 01W. 2100 UTC – PAGASA reports that Tropical Storm Sonamu (Auring), has made landfall on the southern tip of the Philippine island Palawan.
January 4 00:00 UTC – The JTWC reports that Tropical Depression Sonamu (Auring) has intensified into a tropical storm. 09:00 UTC – PAGASA issues its final advisory on Tropical Storm Sonamu (Auring), as the system has moved out of the Philippine area of responsibility.
January 5 00:00 UTC – The JMA reports that Tropical Storm Sonamu (Auring), has become a severe tropical storm as it reaches its peak intensity with 10 — minute sustained windspeeds of . 00:00 UTC – The CMA reports that Tropical Storm Sonamu (Auring), has reached its peak intensity with 2 –minute sustained windspeeds of . 00:00 UTC – The JTWC reports that Tropical Storm Sonamu (Auring), has reached its peak intensity with 1 –minute sustained windspeeds of .
January 6 06:00 UTC – The JMA reports that Tropical Storm Sonamu (Auring), has weakened into a tropical storm, as it starts to monitor a tropical depression located about to the southeast of Melekeok, Palau.
January 7 12:00 UTC – The JTWC reports that Tropical Storm Sonamu (Auring), has weakened into a tropical depression.
January 8 00:00 UTC – The JMA and CMA report that Tropical Storm Sonamu (Auring), has weakened into a tropical depression. 00:00 UTC – The JTWC stops monitoring Tropical Depression Sonamu (Auring).
January 9 06:00 UTC – The CMA stops monitoring Tropical Depression Sonamu (Auring), as it weakens below tropical depression strength.
January 10 00:00 UTC – The JMA reports that Tropical Depression Sonamu (Auring), has dissipated about to the northwest of Borneo.
January 11 12:00 UTC – PAGASA names the tropical depression, that the JMA were previous monitoring to the southeast of Palau: Bising.
January 13 00:00 UTC – PAGASA reports that Tropical Depression Bising has weakened into an area of low pressure and issues its final advisory on it. 12:00 UTC – Tropical Depression Bising is last noted by the JMA, while the system is located about to the southeast of Taipei, Taiwan.
February
February 18 0600 UTC – The JMA and CMA report that a tropical depression has developed about to the east of General Santos City on the Philippine island of Mindanao. 0930 UTC – PAGASA names the tropical depression: Crising.
February 19 0900 UTC – PAGASA reports that Tropical Depression Crising has made landfall, on the southern tip of Davao del Sur province on the Philippine island of Mindanao. 2100 UTC – PAGASA reports that Tropical Depression Crising, has moved into the Sulu Sea after passing around Mindanao island.
February 21 0900 UTC – The JTWC issues its final advisory on Tropical Depression Crising. 0900 UTC – PAGASA reports that Tropical Depression Crising has left its area of responsibility and issues its final advisory. 1800 UTC – The JMA reports that Tropical Depression Crising has intensified into a tropical storm, while at its peak intensity with 10-minute sustained wind speeds of . 1800 UTC – The CMA reports that Tropical Depression Crising has intensified into a tropical storm, while at its peak intensity with 2-minute sustained wind speeds of . 1800 UTC — The JTWC starts to monitor Tropical Storm Crising as a tropical depression, while at its peak intensity with peak 1-minute sustained wind speeds of .
February 22 0000 UTC – The JMA names Tropical Storm Crising; Shanshan. 1200 UTC – The JMA reports that Tropical Storm Shanshan (Crising), has weakened into a tropical depression. 1200 UTC – The JTWC reports that Tropical Depression Shanshan (Crising), has weakened into a tropical disturbance.
February 23 0000 UTC – The CMA reports that Tropical Storm Shanshan (Crising) has weakened into a tropical depression. 0600 UTC – The JTWC, CMA and JMA stop monitoring Tropical Depression Shanshan (Crising) as it dissipated, about to the north–west of Kuching in Malaysia.
March March 20 0600 UTC — The JMA reports that a tropical depression has developed about to the southeast of Manila, Philippines.
March 21 1800 UTC — The JMA stops monitoring the tropical depression.
May There were no tropical cyclones recorded within the basin during May.
June June 6 18:00 UTC – The JMA reports that a tropical depression, has formed about to the southeast of Manila on the Philippine island of Luzon.
June 7 12:00 UTC – The CMA and PAGASA start monitoring the tropical depression, with the latter naming it Dante.
June 8 12:00 UTC – The CMA and JMA report that Tropical Depression Dante, has intensified into a tropical storm, with the JMA naming it Yagi. 12:00 UTC – The JTWC initiates advisories on Tropical Storm Yagi (Dante) and assigns it the designation 03W. 18:00 UTC – The JTWC reports that Tropical Depression Yagi (Dante), has intensified into a tropical storm.
June 10 12:00 UTC – The JMA reports that Tropical Storm Yagi (Dante), has peaked with 10-minute sustained wind speeds of . 12:00 UTC – The CMA reports that Tropical Storm Yagi (Dante), has peaked with 2-minute sustained wind speeds of , which made the system a severe tropical storm. 12:00 UTC – PAGASA issues its final advisory on Tropical Storm Yagi (Dante), as it moves out of their area of responsibility.
June 11 06:00 UTC – The CMA reports that Severe Tropical Storm Yagi (Dante) has weakened into a tropical storm.
June 12 06:00 UTC – The JMA reports that Tropical Storm Yagi (Dante), has degenerated into an extratropical low. 12:00 UTC – The CMA reports that Tropical Storm Yagi has weakened into a tropical depression.
June 14 00:00 UTC – The CMA stops monitoring Tropical Storm Yagi, as it weakens below tropical depression intensity.
June 16 06:00 UTC – The JMA reports that a tropical depression has formed, about to the southeast of Manila in the Philippines. 09:00 UTC – PAGASA names the tropical depression; Emong. 12:00 UTC – The JMA reports that the extratropical low that was Tropical Storm Yagi, has dissipated about to the southeast of Tokyo, Japan. 18:00 UTC – The CMA starts monitoring Tropical Depression Emong.
June 17 18:00 UTC – The JTWC initiates advisories on Tropical Depression Emong, and assigns it the designation 04W.https://www.webcitation.org/6HTSzz0SY?url=http://gwydir.demon.co.uk/advisories/WTPN31-PGTW_201306172100.htm
June 18 00:00 UTC – The JMA reports that Tropical Depression Emong, has developed into a tropical storm and names it Leepi. 18:00 UTC – The JMA reports that Tropical Storm Leepi (Emong), has reached its peak intensity with 10-minute sustained winds of 75 km/h (45 mph).
June 19 18:00 UTC – The JMA reports that a tropical depression has developed within the South China Sea, about to the west of Manila in the Philippines. The low pressure area intensified as a tropical depression as the PAGASA named it Fabian. Fabian also gave the designation 05W.
June 20
18:00 UTC – The JMA reports that Tropical Depression Fabian, has intensified into a tropical storm and names it Bebinca.
June 21 00:00 UTC – The JMA reports that Tropical Storm Leepi, has degenerated into an extratropical low.
June 22 00:00 UTC – The JMA reports that Tropical Storm Bebinca (Fabian), has reached its peak intensity, with 10-minute sustained windspeeds of 75 km/h (45 mph).
June 24 00:00 UTC – The JMA reports that the extratropical low that was Tropical Storm Leepi, has dissipated over to the southeast of Anchorage, Alaska. 06:00 UTC – The JMA reports that Tropical Storm Bebinca (Fabian), has weakened into a tropical depression, over the Vietnamese province of Bắc Giang. 12:00 UTC – The JMA reports that Tropical Depression Bebinca (Fabian) has dissipated over land, near the border between the Vietnamese provinces of Bắc Giang and Lạng Sơn.
June 27 00:00 UTC – The JMA reports that a tropical depression has developed within the South China Sea, about to the west of Manila.
June 28 12:00 UTC – The JMA reports that the tropical depression, has intensified into a tropical storm and names it Rumbia.
July July 1 06:00 UTC — The JMA reports that Tropical Storm Rumbia has reached its peak intensity, with 10-minute sustained windspeeds of 95 km/h (60 mph) which made it a severe tropical storm. 18:00 UTC — The JMA reports that Severe Tropical Storm Rumbia has weakened into a tropical storm.
July 2 12:00 UTC — The JMA reports that Tropical Storm Rumbia has weakened into a tropical depression over the Chinese autonomous region of Guangxi. 18:00 UTC — The JMA reports that Tropical Depression Rumbia has dissipated over the Chinese autonomous region of Guangxi.
July 6 A large disturbance forms in the Pacific Ocean.
July 7 The JMA has upgraded the disturbance to a depression as it moves a west-southwest direction naming it 07W.
July 8 07W rapidly wraps itself with dry air and some clusters of thunderstorms becoming a tropical storm naming it Soulik. Soulik rapidly becomes a severe tropical storm creating an unbalanced eye.
July 9 Soulik rapidly becomes a Category 2 typhoon then a Category 3 typhoon in early noon making the unbalanced eye to a balanced eye. July 10 Soulik gathers some more warm water and evaporation as it becomes a Category 4 typhoon and enters the Philippine are of responsibility naming it Huaning. July 11 Soulik's eye becomes unbalanced again as it weakens to a Category 2 typhoon as it enters Taiwan on late July 11. July 14