This timeline documents all of the events of the 2010 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, 32 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, 11 systems entered or formed in the Philippine area of responsibility, which only two of them directly made landfall over the Philippines.
Overall, there were only 14 named storms which developed during the season, which makes it the lowest on record. This is due to the La Niña, which was last occurred during 1998. The first half of the season was extremely quiet with only four tropical depressions forming, which one of the only made it to tropical storm strength.
For convenience of following systems monitored my multiple agencies, all systems are listed with an unofficial "Storm ID" which is derived from the total number of tropical cyclones monitored during the year.
Timeline of events
January
January 18 06:00 UTC at A tropical depression develops 765 km (465 mi) southeast of Ho Chi Minh City, Vietnam. 12:00 UTC at Tropical Depression 01W develops 760 km (460 mi) southeast of Ho Chi Minh City, Vietnam.
January 19 00:00 UTC at Tropical Depression 01W reaches its peak strength with winds of 55 km/h (35 km/h). 06:00 UTC at The tropical depression attains its lowest pressure of 1006 hPa (mbar; ).
January 20 00:00–06:00 UTCThe tropical depression makes landfall over the Bình Đại District of Vietnam. Tropical Depression 01W makes landfall near Vũng Tàu, Vietnam, with winds of . 06:00 UTC at Tropical Depression 01W degenerates into a tropical disturbance near the Cambodia–Vietnam border. 18:00 UTC at| The final bulletin on the tropical depression is issued.
February
There were no tropical depressions reported in the Northwestern Pacific during February.
March
March 21 18:00 UTC at Tropical Depression 02W develops about 725 km (450 mi) south of Guam.
March 22 06:00 UTC at A tropical depression develops 765 km (465 mi) southeast of Ho Chi Minh City, Vietnam. 18:00 UTC at Tropical Depression 02W strengthens into a tropical storm roughly 665 km (415 mi) southwest of Guam.
March 24 00:00 UTC at Advisories on Tropical Depression Agaton are initiated. 12:00 UTC at The tropical depression strengthens into a tropical storm and is assigned the name Omais roughly 895 km (555 mi) east-northeast of Borongan, Philippines. It simultaneously reaches its peak intensity with winds of and a pressure of 998 hPa (mbar; 29.47 inHg). 18:00 UTC at Tropical Storm 02W reaches its peak strength with winds of approximately 805 km (500 mi) east-northeast of Borongan, Philippines.
March 25 18:00 UTC at Tropical Storm 02W weakens to a tropical depression about 815 km (505 mi) northeast of Borongan, Philippines.
March 26 00:00 UTC at Tropical Storm Omais weakens to a tropical depression about 945 km (585 mi) northeast of Borongan, Philippines. 06:00 UTC at Tropical Depression 02W transitions into an extratropical cyclone roughly 1,010 km (630 mi) northeast of Borongan, Philippines.
March 27 00:00 UTC at Tropical Depression Omais dissipates roughly 985 km (610 mi) northeast of Borongan, Philippines.
April
April 26 0000 UTC, (0800 UTC+8) - The JMA reports that a tropical depression has formed about 1120 km (700 mi) to the southeast of Manila in the Philippines. 1800 UTC, (0200 UTC+8, April 27) - The JMA issues the last advisory on the tropical depression as the depression weakens into an area of low pressure.
May
There were no tropical depressions reported in the Northwestern Pacific during May.
June
June 3 1800 UTC, (0200 UTC+8 June 4) — The JMA reports that a Tropical Depression has formed about 600 km, (370 mi) to the northwest of Manila in the Philippines.
June 5 1800 UTC, (0200 UTC+8 June 6) — The JMA releases the final advisory on the Tropical Depression as it has dissipated.
July
July 11 1200 UTC, (2000 UTC+8) - The JTWC reports that Tropical Depression 03W has formed about 1250 km (775 mi) to the southeast of Manila, Philippines. 1200 UTC, (1400 UTC+8) - The JMA starts monitoring Tropical Depression 03W as a tropical depression. 1800 UTC, (0200 UTC+8 July 12) - The JTWC reports that Tropical Depression 03W has intensified into a tropical storm. 2100 UTC, (0500 UTC+8) - PAGASA reports that Tropical Depression 03W has entered its area of responsibility and names it as Basyang.
July 12 0000 UTC, (0800 UTC+8) - The JMA reports that Tropical Depression Basyang (03W) has intensified into a tropical storm and names it as Conson. 1200 UTC, (2000 UTC+8) - The JMA reports that Tropical Storm Conson, (Basyang, 03W) has intensified into a severe tropical storm. 1800 UTC, (0200 UTC+8 July 13) - The JMA reports that Severe Tropical Storm Conson, (Basyang, 03W) has intensified into a typhoon. 1800 UTC, (0200 UTC+8 July 13) - The JMA reports that Typhoon Conson, (Basyang, 03W) has reached its ten-minute peak sustained windspeeds of 130 km/h, (80 mph). 1800 UTC, (0200 UTC+8, July 13) - The JTWC reports that Tropical Storm Conson, (Basyang, 03W) has intensified into a typhoon.
July 13 0000 UTC, (0800 UTC+8) - The JTWC reports that Typhoon Conson, (Basyang, 03W) has reached its one-minute peak sustained windspeeds of 130 km/h, (80 mph). 1200 UTC, (2000 UTC+8) - The JTWC reports that Typhoon Conson, (Basyang, 03W) has weakened into a tropical storm. 1800 UTC, (0200 UTC+8, July 14) - Typhoon Conson, (Basyang, 03W) makes landfall on Quezon Provence in the Philippines. 1800 UTC, (0200 UTC+8, July 14) - The JMA reports that Typhoon Conson, (Basyang, 03W) has weakened into a severe tropical storm.
July 14 1200 UTC, (2000 UTC+8) - The JMA reports that Severe Tropical Storm Conson, (Basyang, 03W) has weakened into a tropical storm.
July 15 0000 UTC, (0800 UTC+8) - The JMA reports that Tropical Storm Conson, (Basyang, 03W) has intensified into a severe tropical storm. 1200 UTC, (2000 UTC+8) - The JMA reports that Severe Tropical Storm Conson, (Basyang, 03W) has intensified into a typhoon. 1200 UTC, (2000 UTC+8) - The JMA reports that Typhoon Conson, (Basyang, 03W) has regained its ten-minute peak sustained windspeeds of 130 km/h, (80 mph). 1200 UTC, (2000 UTC+8) - The JTWC reports that Tropical Storm Conson, (Basyang, 03W) has intensified into a typhoon.
July 16 0000 UTC, (0800 UTC+8) - The JTWC reports that Typhoon Conson, (Basyang, 03W) has reached its one-minute peak sustained windspeeds of 140 km/h, (85 mph). 1800 UTC, (0200 UTC+8 July 17) - The JTWC reports that Typhoon Conson, (Basyang, 03W) has weakened into a tropical storm.
July 17 0000 UTC, (0800 UTC+8) - The JMA reports that Typhoon Conson has weakened into a severe tropical storm. 0600 UTC, (1400 UTC+8) - The JMA reports that a Tropical Depression has formed about 260 km, (160 mi) to the northeast of Manila in the Philippines. 1200 UTC, (2000 UTC+8) - The JMA reports that Severe Tropical Storm Conson has weakened into a tropical storm. 1500 UTC, (2300 UTC+8 July 18) - Tropical Storm Conson makes landfall in northern Vietnam. 1800 UTC, (0200 UTC+8 July 18) - The JTWC reports that Tropical Storm Conson (Basyang, 03W) has weakened into a tropical depression.
July 18 0000 UTC, (0800 UTC+8) - The JMA reports that Tropical Storm Conson, (Basyang, 03W) has weakened into a tropical depression. 0000 UTC, (0800 UTC+8) - The JMA issues the final advisory on Tropical Depression Conson, (Basyang, 03W) as it dissipates over Vietnam. 0600 UTC, (1400 UTC+8) - The JMA Tropical Depression previously located to the northeast of Manila makes landfall over the Philippines. 0900 UTC, (1700 UTC+8) - The JTWC designates the Tropical Depression as Tropical Depression 04W. 1200 UTC, (2000 UTC+8) - The JMA reports that a Tropical Depression has formed about 560 km, (350 mi) to the northeast of Taipei City in Taiwan. 2100 UTC, (0500 UTC+8 July 19) - PAGASA names Tropical Depression 04W as Caloy.
July 19 1200 UTC, (2000 UTC+8) - The JMA reports that Tropical Depression Caloy (04W), has intensified into a tropical storm and names it as Chanthu. 1800 UTC, (0200 UTC+8 July 21) - The JTWC reports that Tropical Depression Chanthu (Caloy, 04W), has intensified into a tropical storm.
July 20 1200 UTC, (2000 UTC+8) - The JMA issues their final advisory on the tropical depression previously located to the northeast of Taipei City in Taiwan as it dissipates. 1800 UTC, (0200 UTC+8 July 21) - The JMA reports that Tropical Storm Chanthu (Caloy, 04W) has intensified into a severe tropical storm.
July 21 1200 UTC, (2000 UTC+8) - The JMA reports that Severe Tropical Storm Chanthu (Caloy, 04W) has intensified into a typhoon.
July 22 0000 UTC, (0800 UTC+8) - The JMA reports that Typhoon Chanthu (Caloy, 04W) has regained its ten-minute peak sustained windspeeds of 130 km/h, (80 mph). 0000 UTC, (0800 UTC+8) - The JTWC reports that Tropical Storm Chanthu (Caloy, 04W) has intensified into a typhoon. 0000 UTC, (0800 UTC+8) - The JTWC reports that Typhoon Chanthu (Caloy, 04W) has reached its one-minute peak sustained windspeeds of 140 km/h, (85 mph). 0300 UTC, (1400 UTC+8) - Typhoon Chanthu (Caloy, 04W) makes landfall on Guangdong Province in southern China. 1200 UTC, (2000 UTC+8) - The JTWC reports that Typhoon Chanthu (Caloy, 04W) has weakened into a tropical storm. 1800 UTC, (0200 UTC+8, July 23) - The JMA reports that Typhoon Chanthu (Caloy, 04W) has weakened into a severe tropical storm.
July 23 0000 UTC, (0800 UTC+8) - The JMA reports that Severe Tropical Storm Chanthu (Caloy, 04W) has weakened into a tropical storm. 0000 UTC, (0800 UTC+8) - The JTWC issues its final advisory on Tropical Storm Chanthu (Caloy, 04W). 0600 UTC, (1400 UTC+8) - The JMA reports that Tropical Storm Chanthu has weakened into a tropical depression. 1800 UTC, (0200 UTC+8, July 24) - The JMA reports that Tropical Depression Chanthu has dissipated.
July 24 0000 UTC, (0800 UTC+8) - The JMA reports that a tropical depression has formed about 40 km, (25 mi), to the east of Taipei, Taiwan. 1200 UTC, (2000 UTC+8) - The JMA reports that the tropical depression has made landfall in Yilan County, Taiwan. 1800 UTC, (0200 UTC+8) - The JMA issues its final advisory on the tropical depression as it dissipates off the coast of Fujian Province, China.
July 26 1800 UTC, (0200 UTC+8 July 23) - The JMA reports that a tropical depression has formed about 65 km, (40 mi).
July 28 0000 UTC, (0800 UTC+8) - The JMA issues their final advisory on the tropical depression as it dissipates within the Yellow Sea.
August
August 3