Natural World. Mid-latitude cyclones, sometimes called extratropical cyclones, form at the polar front when the temperature difference between two air masses is large. BSL Geography Glossary - Hurricane/Typhoon - definition. Typhoon definition is - a hurricane occurring especially in the region of the Philippines or the China sea. Resembling large whirlpools, they are made up of rotating, moist air, with wind speeds that can reach over 120 km/h. Typhoons begin over warm water and in humid air between 10 and 20 degrees latitude north in the Pacific Ocean. Haiphong, West Pacific: 1881 - 300,000 deaths. Great Bhola, Bangladesh: 1970 - 500,000 deaths. in the South China Sea. Geography; Maths; Society; Home. Tropical cyclones are immensely powerful and can travel up to speeds of 65 km/h. A powerful typhoon that will hit the Philippines on Friday has triggered mass evacuations from coastal and low-lying areas as the nation's islands brace for the storm's surge. And the northern Indian Ocean sees cyclones from April to December. See more. Backerganj, Bangladesh: 1876 - 200,000 deaths. typhoon. The strongest storms, equivalent to Category 5 on the Saffir-Simpson scale, have sustained winds that exceed 155 miles per hour (250 kilometers per hour). The definition of a typhoon is a tropical cyclone with winds faster than 74 miles per hour that occurs in the North Atlantic Ocean, the Northeast Pacific Ocean east of the dateline, the South Pacific east of 160E and the Northwest Pacific Ocean west of the date line. Before a typhoon hits, there are large waves, falling barometric pressure and a storm surge. Facts for kids: What is a typhoon? Typhoon definition, a tropical cyclone in the western Pacific Ocean or northern Indian Ocean, having sustained winds of at least 64 knots (74 miles per hour, 33 meters per second): typhoons form in waters with surface temperatures of about 80°F (27°C), intensifying as temperatures rise. Tropical cyclone, also called typhoon or hurricane, an intense circular storm that originates over warm tropical oceans and is characterized by low atmospheric pressure, high winds, and heavy rain.Drawing energy from the sea surface and maintaining its strength as long as it remains over warm water, a tropical cyclone generates winds that exceed 119 km (74 miles) per hour. In the northwestern Pacific, the same powerful storms are called typhoons. In the southwestern Indian Ocean, they're just tropical cyclones. https://www.nationalgeographic.com/news/2013/11/131107-typhoons-pacific-natural-disasters.html. The Category 5 typhoon is expected to hit the Philippines at full strength. Some of the countries that experience typhoons: Guam, Marianas Islands, Philippines, Taiwan, southern China, South Korea, southern Japan and Vietnam. Coriolis Effect deflects winds to the right in the Northern Hemisphere, causing the winds to strike the polar front at an angle. Typhoon Haiyan from the Internatioal Space Station. In the northern Indian Ocean, they're called severe cyclonic storms. In the northern Indian Ocean, they're called severe cyclonic storms. • But this contempt was like a typhoon blowing away all my resources and possessions. a tropical cyclone or hurricane of the western Pacific area and the China seas. If conditions are favorable, especially the temperature of the water, then the system grows and eventually an eye will form. A tropical cyclone is a fast-spinning storm system that has a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain. A severe typhoon has sustained winds of at least 95 miles per hour or 80 knots and a super typhoon has sustained winds of at least 115 miles per hour or 100 knots. How do typhoons differ from hurricanes or cyclones? Most winter storms in the middle latitudes, includin… But as Hurricane Sandy showed recently, predicting the path that a hurricane, typhoon, or cyclone will take after it's formed is still tricky. 2020 National Geographic Partners, LLC. With the aid of satellites and computer models, such storms can be predicted several days in advance and are relatively easy to track. Clouds begin to form as the air cools because of its elevation and soon the system begins to rotate. As it is getting nearer, the winds will get stronger and large numbers of cumulus clouds appear. In physical geography, the movement of sediment load by water, wind or ice.