The 2005 Pacific typhoon season was the least active typhoon season since 2000, producing 23 named storms, of which 13 became typhoons. It was an event in the annual cycle of tropical cyclone formation, in which tropical cyclones form in the western Pacific Ocean. The season ran throughout 2005, though most tropical cyclones typically develop between May and October. The season's first named storm, Kulap, developed on January 13, while the season's last named storm, Bolaven, dissipated on November 20. The season's first typhoon, Haitang, reached typhoon status on July 13, and became the first super typhoon of the year three days later.
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 2005. Most of these tropical cyclones formed between May and November 2005. 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 (JMA). Tropical depressions that form in this basin are given a number with a "W" suffix by the United States' Joint Typhoon Warning Center (JTWC). In addition, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) assigns names to tropical cyclones that enter or form in the Philippine area of responsibility. These names, however, are not in common use outside of the Philippines.
Typhoons in the Philippines can occur any time of the year, with the months of June to September being most active, with August being the most active individual month and May the least active. Approximately 20 tropical cyclones enter the Philippine area of responsibility yearly, an area which incorporates parts of the Pacific Ocean, the South China Sea, and the Philippine Archipelago. In each year, ten cyclones are usually expected to be typhoons, with five having the potential to be destructive ones. According to a 2013 Time Magazine article, the Philippines is "the most exposed country in the world to tropical storms". In the Philippine languages, tropical cyclones are generally called bagyo.
The 2009 Pacific typhoon season was a below average season that spawned only 22 named storms, 13 typhoons, and five super typhoons. It was also recognized as the deadliest season in the Philippines for decades. The first half of the season was very quiet whereas the second half of the season was extremely active. The season's first named storm, Kujira, developed on May 3 while the season's last named storm, Nida, dissipated on December 3.
The name Unding has been used for three tropical cyclones in the Philippines by PAGASA in the Western Pacific.
Typhoon Ketsana, known in the Philippines as Tropical Storm Ondoy, was the second-most devastating tropical cyclone of the 2009 Pacific typhoon season, causing $1.15 billion in damages and 921 fatalities, only behind Morakot earlier in the season, which caused 789 deaths and damages worth $6.2 billion. Ketsana was the sixteenth tropical storm, and the eighth typhoon of the season. It was the most devastating tropical cyclone to hit Manila, surpassing Typhoon Patsy (Yoling) in 1970.
Typhoon Parma, known in the Philippines as Typhoon Pepeng, was the second typhoon to affect the Philippines within the span of a week during September 2009.
The effects of the 2009 Pacific typhoon season in the Philippines were considered some of the worst in decades. Throughout the year, series of typhoons impacted the country, with the worst damage occurring during September and October from Typhoons Ketsana and Parma.
The name Paolo has been used for two tropical cyclones in the Philippines by the PAGASA in the Western Pacific Ocean. It replaced the retired name Pepeng in 2009.
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