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Most typhoons form in a region in the northwest Pacific known as typhoon alley, where the planet's most powerful tropical cyclones most frequently develop. [36] When the subtropical ridge shifts due to El Niño, so will the preferred tropical cyclone tracks.
The Philippines is a typhoon-prone country, with approximately twenty tropical cyclones entering its area of responsibility per year. Locally known generally as bagyo (), [3] typhoons regularly form in the Philippine Sea and less often, in the South China Sea, with the months of June to September being the most active, August being the month with the most activity.
A typhoon occurs in the northwestern Pacific Ocean. In the Indian Ocean and South Pacific, comparable storms are referred to as "tropical cyclones". In modern times, on average around 80 to 90 named tropical cyclones form each year around the world, over half of which develop hurricane-force winds of 65 kn (120 km/h; 75 mph) or more. [1]
The West Pacific is the most active and the north Indian the least active. An average of 86 tropical cyclones of tropical storm intensity form annually worldwide, with 47 reaching hurricane/typhoon strength, and 20 becoming intense tropical cyclones, super typhoons, or major hurricanes (at least of Category 3 intensity). [1]
The western Pacific is the most active and the north Indian the least active. An average of 86 tropical cyclones of tropical storm intensity form annually worldwide, with 47 reaching hurricane/typhoon strength, and 20 becoming intense tropical cyclones, super typhoons, or major hurricanes (at least of Category 3 intensity). [1]
Typhoon Usagi, known as Ofel in the Philippines, is rapidly intensifying Wednesday evening over the Philippine Sea and is moving to the west-northwest with additional strengthening expected before ...
That super typhoon — defined as having wind speed of above 240 kilometers per hour or 150 miles per hour — killed at least 62 people across Hainan, Guangdong, Guangxi and Yunnan provinces ...
Tropical cyclones are known to form even when normal conditions are not met. For example, cooler air temperatures at a higher altitude (e.g., at the 500 hPa level, or 5.9 km) can lead to tropical cyclogenesis at lower water temperatures, as a certain lapse rate is required to force the atmosphere to be unstable enough for convection.