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classification of tropical cyclone

Should the tropical system further intensify and have winds estimated or measured, as greater than 64 kn (74 mph; 119 km/h), then it will be called a hurricane and classified on the Saffir–Simpson hurricane wind scale. Ex-tropical Cyclone. [18] Specifically it was decided that the classifications: Weak Tropical Depression, Moderate Tropical Depression and Severe Tropical Depression would be changed to Tropical Depression, Moderate Tropical Storm and Severe Tropical Storm. Office of Director General of Meteorology INDIA METEOROLOGICAL DEPARTMENT Mausam Bhawan, Lodhi Road New Delhi - 110003 It's important to note that tropical cyclones are classified by their maximum sustained wind speed (an average wind over a length of time ranging from 1 to 10 minutes, depending on the region of the globe). Any tropical cyclone that develops within the Southern Hemisphere between Africa and 90°E is monitored by Meteo France's La Reunion tropical cyclone centre (MFR, RSMC La Reunion). A class of post-tropical cyclone that no longer possesses the convective organization required of a tropical cyclone and has maximum sustained winds of less than 34 knots. SUPER TYPHOON (STY) - a tropical cyclone with maximum wind speed exceeding 220 kph or more than 120 knots. Although increasing echelons of the scale correspond to stronger winds, the rankings are not absolute in terms of effects. Tropical cyclones with an organized system of clouds and thunderstorms with a defined circulation, and maximum sustained winds of 38 mph (61 km/h) or less are called "tropical depressions". All of the scales rank tropical cyclones using their maximum sustained winds, which are either observed, measured or estimated using various techniques, over a period between one and ten minutes. An example of such scale is the Integrated Kinetic Energy index, which measures the destructive potential of the storm surge on the coast; it works on a scale that ranges from one to six, with six having the highest destructive potential. [25] The HSI is a 0 to 50 point scale, allotting up to 25 points for a tropical cyclone's intensity and up to 25 points for wind field size. [17] A severe tropical storm is designated as a tropical cyclone when it reaches wind speeds of 64 knots (118 km/h, 74 mph). [1][3] A post tropical cyclone is a system that has weakened, into a remnant low or has dissipated and formal advisories are usually discontinued at this stage. + Tropical Cyclone Classification. Once the tropical cyclone reaches winds of at least 39 mph (63 km/h) they are typically called a "tropical storm" and assigned a name. [19] These are run by the Fiji Meteorological Service, New Zealand's MetService, Indonesia's Badan Meteorologi, Klimatologi, dan Geofisika, Papua New Guinea's National Weather Service and the Australian Bureau of Meteorology. A tropical disturbance is MFR's generic term for a non-frontal area of low pressure that has organized convection and definite cyclonic surface wind circulation. The PAGASA warning system issues a storm … [1] However, advisories may continue if the post tropical cyclone poses a significant threat to life and property. [19] A tropical disturbance is defined as being a non-frontal system of synoptic scale originating over the tropics, with persistent enhanced convection and/or some indication of a circulation. Should a system intensify further and become a hurricane, then it will be classified on the Saffir–Simpson hurricane wind scale, and is based on the estimated maximum sustained winds over a 1-minute period. [6] The highest classification on the Typhoon Committee's scale is a typhoon, which has winds speeds greater than 64 kn (33 m/s; 74 mph; 119 km/h). The region also defines a subtropical cyclone as a non-frontal low pressure disturban… No matter how strong a subtropical system is in this basin, it is always designated as a subtropical depression. MISSION & VISION Know more about the TC Mission & Vision. There are several conditions which are favourable for the formation of a tropical cyclone. Once the tropical cyclone reaches winds of at least 39 mph (63 km/h) they are typically called a "tropical storm" and assigned a name. + Tropical Cyclone Classification. For instance, a Category 2 hurricane that strikes a major urban area will likely do more damage than a large Category 5 hurricane that strikes a mostly rural region. TD 20W, became tropical storm Bebinca, but was referred to as TS 20W (BEBINCA) in JTWC advisories); however, in cases when the JTWC upgrades a depression to tropical storm without the JMA following suit (due to the differences between JTWC and JMA wind-speed scales), the spelled-out number (without the suffix) is parenthesized and appended to the TC number as placeholder name, as in TS 16W (SIXTEEN), until JMA upgrades and names it, on which case the name replaces the placeholder. Once the tropical cyclone reaches winds of at least 39 mph (63 km/h) they are typically called a "tropical storm" and assigned a name. In the Western Pacific, the ESCAP/WMO Typhoon Committee uses four separate classifications for tropical cyclones that exist within the basin, which are based on the estimated maximum sustained winds over a 10-minute period. Tropical Cyclone Classification (Stages of Development) Tropical cyclone “opportunities” One of the conditions needed for a tropical cyclone to develop is a pre-existing near-surface disturbance, low-pressure area or region of convergence. [13] The highest classification used in the North Indian Ocean is a Super Cyclonic Storm, which have hurricane-force winds of above 120 kn (138 mph; 222 km/h). [20][21] When a system becomes a Category 3 tropical cyclone it is reclassified as a Severe tropical cyclone and has wind speeds of 64–85 kn (74–98 mph; 119–157 km/h). Globally, tropical cyclones are classified in different ways, based on the location, structure, and intensity. By flying debris cyclone Center project maintains a website that allows visitors to answer questions based tropical... North Atlantic Basin, tropical cyclones a tropical cyclone intensity Structural Features of a Typical tropical cyclone and., FL, 33165 nhcwebmaster @ noaa.gov ( STY ) - a cyclone that across... 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