This timeline documents all of the events of the 2005 Pacific typhoon season, the period that tropical cyclones formed in the Western Pacific Ocean during the year. The scope of this article is limited to the Pacific Ocean, north of the equator between 100°E and the International Date Line. Tropical depressions that form in the basin were given a number with a "W" suffix by the United States' Joint Typhoon Warning Center (JTWC). If a depression intensified into a tropical storm, it would be assigned a name by the Japan Meteorological Agency (JMA). In addition, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) assigned names to tropical cyclones which were in their area of responsibility.
During the season, a total of 33 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. Because the JMA runs the Regional Specialized Meteorological Centre for the Western Pacific, they assigned names to these systems once they intensified into a tropical storm. PAGASA also assigned their own local names to systems which were active within their area of responsibility; however, these names are not in common use outside of PAGASA's area of responsibility.
Timeline of storms
January
January 13 1800 UTC – The Joint Typhoon Warning Center (JTWC) designates an area of low pressure as Tropical Depression 01W. January 14 1800 UTC – The JTWC upgrades Tropical Depression 01W to a tropical storm. January 15 1200 UTC – The Japan Meteorological Agency (JMA) designates Tropical Storm 01W as Tropical Storm Kulap. January 17 1200 UTC – The JMA upgrades Tropical Storm Kulap (01W) to a severe tropical storm. 1800 UTC – The JTWC upgrades Tropical Storm 01W (Kulap) to a typhoon. January 18 0600 UTC – The JTWC downgrades Typhoon 01W (Kulap) to a tropical storm. 1800 UTC – The JTWC issues their final advisory as Tropical Storm 01W (Kulap) starts extratropical transition. 1800 UTC – The JMA downgrades Severe Tropical Storm Kulap (01W) to a tropical storm. January 19 0600 UTC – The JMA issue their final advisory on Tropical Storm Kulap (01W) as the system becomes extratropical.
February No named storms formed in February.
March
March 13 1200 UTC – The JTWC designates an area of low pressure as Tropical Depression 02W. March 14 0600 UTC – The JTWC upgrades Tropical Depression 02W to a tropical storm. March 15 0000 UTC – The JMA designates Tropical Storm 02W as Tropical Storm Roke. 1200 UTC – Tropical Storm Roke enters the Philippine area of responsibility and is designated Tropical Storm Auring by PAGASA for Philippine warnings. 1800 UTC – The JTWC upgrades Tropical Storm 02W (Roke) to a typhoon. 1500 UTC – Tropical Storm Roke (Auring) upgraded to Typhoon Roke (Auring). March 16 0000 UTC – PAGASA upgrades Tropical Storm Auring (Roke) to a severe tropical storm. 0600 UTC – The JMA upgrades Tropical Storm Roke (02W) to a severe tropical storm. 1200 UTC – Typhoon Roke (Auring) approaching landfall south of Borongan, Philippines. 1800 UTC – The JMA downgrades Severe Tropical Storm Roke (02W) to a tropical storm. March 17 0000 UTC – The JTWC downgrades Typhoon 02W (Roke) to a tropical storm. 0600 UTC – PAGASA downgrades Severe Tropical Storm Auring (Roke) to a tropical storm. 1200 UTC – The JMA downgrades Tropical Storm Roke (02W) to a tropical depression. 1800 UTC – The JTWC downgrades Tropical Storm 02W (Roke) to a tropical depression and the final advisory is issued. 1800 UTC – PAGASA downgrades Tropical Storm Auring (Roke) to a tropical depression and the final advisory is issued. March 19 0600 UTC – The JMA downgrades Tropical Depression Roke (02W) to an area of disturbed weather and the final advisory is issued.
April
April 20 1200 UTC – Tropical Depression 03W forms 275 nautical miles (510 km) east-southeast of Yap Island. April 22 1200 UTC – Tropical Depression 03W enters the Philippine area of responsibility and is designated Tropical Depression Bising by PAGASA for Philippine warnings. April 23 0000 UTC – Tropical Depression 03W (Bising) upgraded to Tropical Storm Sonca (Bising). 1800 UTC – Tropical Storm Sonca (Bising) upgraded to Typhoon Sonca (Bising). April 24 0000 UTC – Typhoon Sonca (Bising) upgraded to a category 2 storm. 0600 UTC – Typhoon Sonca (Bising) upgraded to a category 3 storm. 1800 UTC – Typhoon Sonca (Bising) upgraded to a category 4 storm. April 26 1800 UTC – Typhoon Sonca (Bising) downgraded to Tropical Storm strength and becomes extratropical 45 nautical miles (80 km) west-northwest of Iwo Jima.
May May 16 0000 UTC – PAGASA designates an area of low pressure east of Mindanao, Philippines as Tropical Depression Crising. May 17 0000 UTC – PAGASA reports that Tropical Depression Crising has degenerated into an area of low pressure west of the island of Mindanao. May 30 0600 UTC – Tropical Depression 04W forms 290 nautical miles (540 km) south-southeast of Agana, Guam. 1800 UTC – Tropical Depression 04W upgraded to Tropical Storm Nesat.
June
June 1 1200 UTC – Tropical Storm Nesat upgraded to Typhoon Nesat. 1800 UTC – Typhoon Nesat intensifies to a category 2 storm. June 2 0000 UTC – Typhoon Nesat rapidly intensifies to a category 4 storm. 1800 UTC – Typhoon Nesat enters the Philippine area of responsibility and is assigned the name Typhoon Dante by PAGASA for Philippine warnings. June 10 0000 UTC – Tropical Storm Nesat (Dante) becomes extratropical 275 nautical miles (510 km) southeast of Nagoya.
July July 4 0600 UTC – PAGASA designates Invest.93W as Tropical Depression Emong 35 nautical miles (65 km) northeast of Catarman Samar Island Philippines. July 5 0600 UTC – PAGASA Tropical Depression Emong makes landfall along the eastern coast of Luzon. July 6 0000 UTC – PAGASA Tropical Depression Emong dissipates west of Luzon. July 11 1200 UTC – Tropical Depression 05W forms 110 nautical miles (200 km) southwest of Marcus Island, Japan. 1800 UTC – Tropical Depression 05W upgraded to Tropical Storm Haitang. July 13 1800 UTC – Tropical Storm Haitang upgraded to Typhoon Haitang. July 14 1200 UTC – Typhoon Haitang intensifies to a Category 2 storm. July 15 0600 UTC – Typhoon Haitang intensifies to a category 3 storm. Storm has entered the Philippine area of responsibility and is designated Typhoon Feria by PAGASA for Philippine warnings. 1200 UTC – Typhoon Haitang (Feria) intensifies to a category 4 storm. July 16 0000 UTC – Typhoon Haitang (Feria) upgraded to category 5 Super Typhoon. July 17 0000 UTC – Typhoon Haitang (Feria) makes landfall at Hualien Taiwan as a category 3 Typhoon. 1800 UTC – Typhoon Haitang (Feria) downgraded to Tropical Storm after passing over Taiwan. July 19 0600 UTC – Tropical Storm Haitang (Feria) upgraded to minimal Typhoon. Nearing second landfall on southeast Chinese coast. 1200 UTC – Typhoon Haitang (Feria) downgraded to Tropical Storm after making landfall on southeast China coast. July 20 0000 UTC – Tropical Depression 06W forms 330 nautical miles (610 km) north of Wake Island. 0600 UTC – Tropical Depression 06W upgraded to Tropical Storm Nalgae. Tropical Depression Haitang (Feria) dissipates Jiangxi, China. July 21 1200 UTC – Tropical Depression 07W forms 300 nautical miles (550 km) north of Yap Island in the Federated States of Micronesia. 1800 UTC – Tropical Depression 07W upgraded to Tropical Storm Banyan. July 23 1200 UTC – Tropical Storm Nalgae dissipates 615 nautical miles (1,140 km) north-northeast of Marcus Island, Japan. July 26 Tropical Storm Banyan brushes the south and east coasts of Honshū Island, Japan. July 27 0000 UTC – Tropical Storm Banyan becomes extratropical off the north east coast of Honshū Island Japan. July 28 1800 UTC – Tropical Depression 08W forms 215 nautical miles (400 km) south of Hong Kong. July 29 1200 UTC – Tropical Depression 08W upgraded to Tropical Storm Washi. July 30 0000 UTC – Tropical Storm Washi makes landfall on Hainan Island, China. July 31 0000 UTC – Tropical Depression 09W forms 130 nautical miles (240 km) west northwest of Yap Island. 0500 UTC – Tropical Storm Washi makes landfall near Nam Định, Vietnam. 0600 UTC – Tropical Depression 09W upgraded to Tropical Storm Matsa. Storm enters the Philippine area of responsibility and is assigned the name Tropical Storm Gorio for Philippine warnings. 1800 UTC – Tropical Depression Washi dissipates over northern Vietnam.
August August 2 0000 UTC – Tropical Storm Matsa (Gorio) upgraded to Typhoon Matsa (Gorio). August 4 1000 UTC – Typhoon Matsa (Gorio) passes over the Yaeyama Islands of Japan. 1200 UTC – Typhoon Matsa (Gorio) intensifies to a Category 2 storm. August 5 1800 UTC – Typhoon Matsa (Gorio) makes landfall near Dajing, China. August 6 0000 UTC – Typhoon Matsa (Gorio) downgraded to a tropical storm. August 7 1200 UTC – Tropical Storm Matsa (Gorio) dissipates near Jiangsu, China. August 10 0000 UTC – Low-pressure system 93W designated Tropical Depression Huaning by PAGASA 320 nautical miles (590 km) east-northeast of Borongan Samar Island, Philippines. 1200 UTC – Joint Typhoon Warning Center reclassifies Low-pressure system 93W as Tropical Depression 10W (Huaning). August 11 0000 UTC – Tropical Depression 10W (Huaning) upgraded, receives the more recognized International name Tropical Storm Sanvu (Huaning). 2100 UTC – Tropical Storm Sanvu (Huaning) passes over the northern tip of Cagayan on Luzon Island. August 13 0000 UTC – Tropical Storm Sanvu (Huaning) upgraded to Typhoon Sanvu (Huaning). 0600 UTC – Typhoon Sanvu (Huaning) makes landfall near Shantou, China. Downgraded to Tropical Storm after landfall. August 14 0000 UTC – Tropical Depression Sanvu (Huaning) dissipates inland near Jiangxi, China. August 19 1500 UTC – Tropical Depression 11W forms in the open Western Pacific. August 20 0000 UTC – Tropical Depression 11W is upgraded to Tropical Storm Mawar. 0000 UTC – Tropical Depression 12W forms in the Western Pacific. August 21 0000 UTC – Tropical Storm Mawar is upgraded to Typhoon Mawar. 0000 UTC – Tropical Depression 12W is upgraded to Tropical Storm Guchol. 0600 UTC – Typhoon Mawar upgraded to a category 3 storm. August 22 0000 UTC – Typhoon Mawar upgraded to a category 4 storm and with winds becomes Super Typhoon Mawar. 0600 UTC – Super Typhoon Mawar still a category 4 storm but at , downgraded to Typhoon Mawar. August 25 0000 UTC – Tropical Storm Guchol becomes extratropical in the North Pacific. 1800 UTC – Typhoon Mawar makes landfall in Japan as a Category 2 typhoon. August 26 0600 UTC – Tropical Depression 13W forms northeast of Yap. 1200 UTC – Typhoon Mawar downgraded to Tropical Storm Mawar after landfall near Tokyo Bay. August 27 0000 UTC – Tropical Storm Mawar becomes extratropical east of Japan. 0000 UTC – Tropical Depression 13W upgraded to Tropical Storm Talim. August 28 0600 UTC – Tropical Storm Talim upgraded to Typhoon Talim. August 29 0000 UTC – Typhoon Talim enters the Philippine area of responsibility and is assigned the name Typhoon Isang for Philippine warnings. 0000 UTC – Typhoon Talim (Isang) upgraded to a Category 2 storm. 0600 UTC – Tropical Depression 14W forms 365 nautical miles (675 km) east of Saipan. 0600 UTC – Typhoon Talim (Isang) upgraded to a Category 3 storm. 1200 UTC – Typhoon Talim (Isang) upgraded to a Category 4 storm. 1800 UTC – Tropical Depression 14W upgraded to Tropical Storm Nabi. August 30 1200 UTC – Tropical Storm Nabi upgraded to Typhoon Nabi. August 31 0000 UTC – Typhoon Nabi upgraded to a Category 2 storm. 1200 UTC – Typhoon Nabi upgraded to a Category 3 storm. 1800 UTC – Typhoon Talim (Isang) makes landfall in Taiwan.
September September 1 0000 UTC – Typhoon Talim (Isang) downgraded to a Category 1 storm over Taiwan Strait.