Typhoon by scsebnic.net

A typhoon is a large and powerful tropical cyclone, a low pressure area rotating counterclockwise and containing rising warm air that forms over warm water in the Western Pacific Ocean. Less powerful tropical cyclones are called Tropical Depressions and Tropical Storms. A typhoon is called Hurricane in the Atlantic Ocean, and Cyclone in the Indian Ocean. Typhoons can inflict terrible damage due to thunderstorms, violent winds, torrential rain and accompanying flooding and landslides, incredible waves, and extremely high tides associated with tidal surges. Hurricane-force winds can reach out as little as 25 miles from the center of a small hurricane and as far as 150 miles in a large hurricane. Tropical storm-force winds can extend as far as 300 miles from the center of a large hurricane. These are very dangerous storms. North Indian Ocean tropical cyclones develop in the Bay of Bengal and Arabian Sea during the srping and fall. Tropical Cyclones in this area form between latitudes 8ºN and 15ºN,except from June through September, when the little activity that does occur is confined north of about 15ºN. These storms are usually short-lived and weak; however winds of 130 knots(150 mph) have been encountered. They often develop as perturbations along the Intertropical Convergence Zone (ITZC); this inhibits summertime development since the ITCZ is usually over land during the monsoon season. However, it is somtimes displaced southward and, when this occurs, storms will form over the monsoon-flooded plains of Bengal. On the average, six cyclonic storms form each year. These include two storms that generate winds of 48 knots(55 mph) or greater. Another 10 tropical cyclones near develop beyond tropical depressions. The Bay of Bengal is the area of highest incidence. However, it is not unusual for a storm to move across southern India and reintensify in the Arabian Sea. This is particularly true during October, the month of highest incidence during the tropical cyclone season. It is also during this period toreential rains from these storms dumped over already rain-soaked areas cause disastrous floods. (Taken from American Practical Navigator Vol 1 1977)


	©EUMETSAT 2008 / MTSAT Courtesy

Indian Ocean Cyclones	Japan Typhoons	Japan Meteorological Agency
	GeoSatSignal `(David J. Taylor©)`
A typhoon is a large and powerful tropical cyclone, a low pressure area rotating counterclockwise and containing rising warm air that forms over warm water in the Western Pacific Ocean. Less powerful tropical cyclones are called Tropical Depressions and Tropical Storms. A typhoon is called Hurricane in the Atlantic Ocean, and Cyclone in the Indian Ocean. Typhoons can inflict terrible damage due to thunderstorms, violent winds, torrential rain and accompanying flooding and landslides, incredible waves, and extremely high tides associated with tidal surges. Hurricane-force winds can reach out as little as 25 miles from the center of a small hurricane and as far as 150 miles in a large hurricane. Tropical storm-force winds can extend as far as 300 miles from the center of a large hurricane. These are very dangerous storms. North Indian Ocean tropical cyclones develop in the Bay of Bengal and Arabian Sea during the srping and fall. Tropical Cyclones in this area form between latitudes 8ºN and 15ºN,except from June through September, when the little activity that does occur is confined north of about 15ºN. These storms are usually short-lived and weak; however winds of 130 knots(150 mph) have been encountered. They often develop as perturbations along the Intertropical Convergence Zone (ITZC); this inhibits summertime development since the ITCZ is usually over land during the monsoon season. However, it is somtimes displaced southward and, when this occurs, storms will form over the monsoon-flooded plains of Bengal. On the average, six cyclonic storms form each year. These include two storms that generate winds of 48 knots(55 mph) or greater. Another 10 tropical cyclones near develop beyond tropical depressions. The Bay of Bengal is the area of highest incidence. However, it is not unusual for a storm to move across southern India and reintensify in the Arabian Sea. This is particularly true during October, the month of highest incidence during the tropical cyclone season. It is also during this period toreential rains from these storms dumped over already rain-soaked areas cause disastrous floods. (Taken from American Practical Navigator Vol 1 1977)