Cyclone
Large scale air mass that rotates around a strong center of low pressure
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In meteorology, a cyclone is a large air mass that rotates around a strong center of low atmospheric pressure, counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere as viewed from above. Cyclones are characterized by inward-spiraling winds that rotate about a zone of low pressure. The largest low-pressure systems are polar vortices and extratropical cyclones of the largest scale. Warm-core cyclones such as tropical cyclones and subtropical cyclones also lie within the synoptic scale. Mesocyclones, tornadoes, and dust devils lie within smaller mesoscale. Upper level cyclones can exist without the presence of a surface low, and can pinch off from the base of the tropical upper tropospheric trough during the summer months in the Northern Hemisphere. Cyclones have also been seen on extraterrestrial planets, such as Mars, Jupiter, and Neptune. Cyclogenesis is the process of cyclone formation and intensification. Extratropical cyclones begin as waves in large regions of enhanced mid-latitude temperature contrasts called baroclinic zones. These zones contract and form weather fronts as the cyclonic circulation closes and intensifies. Later in their life cycle, extratropical cyclones occlude as cold air masses undercut the warmer air and become cold core systems. A cyclone's track is guided over the course of its 2 to 6 day life cycle by the steering flow of the subtropical jet stream.
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![]() Cyclone Mandous wrecks havoc in TN | What are the do's and dont's to follow | Oneindia News *News Credit: Oneindia Duration: 03:01Published | |
![]() Cyclone Mandous leaves Chennai roads waterlogged, uproots trees | Oneindia News *News Credit: Oneindia Duration: 03:01Published | |
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Cyclone 'Mandous' turns 'severe': Flights cancelled, intense rainfall alert in Chennai | 10 highlightsThe Chennai airport announced that starting from 6 pm on Friday several flights have been delayed and cancelled.DNA - Published | |
Cyclone Sitrang to hit on Diwali? Cyclone warning in West Bengal coast, Odisha on alert during festive seasonThe storm - to be called Sitrang when it takes shape - is brewing near the sea off the Andamans, and moving towards the Bengal-Bangladesh coast.DNA - Published | |
Cyclone Asani: Centre suggests suspending fishing operationsSuspension of fishing operations has been suggested in view of impending Cyclone ‘Asani’ that is likely to hit coastal areas of Andhra Pradesh and Odisha later this week.IndiaTimes - Published | |
Cyclone to hit Odisha, AP, Bengal next weekIndiaTimes - Published | |
Cyclone alert in 18 districts of Odisha, district authorities asked to be preparedThe IMD also indicted that conditions are favourable for the formation of a storm next week.DNA - Published | |
Cyclone alert for Odisha, know when it will hit the coastThe India Meteorological Department (IMD) said that a clear picture of the possibility of a cyclone is yet to emerge.DNA - Published | |
Cyclone brewing in Bay of Bengal, Andaman and Nicobar Islands to get heavy rainsIndiaTimes - Published | |
Cyclone over Bay of Bengal likely next weekThe first cyclone over the Bay of Bengal (BoB) in the 2021 post-monsoon season could develop in the south Andaman Sea in a few days and hit India’s eastern coast in the first week of December,..IndiaTimes - Published | |
Cyclone alert issued in Andhra Pradesh and Odisha, heavy rains likely in West BengalThe NDRF has deployed as many as 15 teams for coastal districts of West Bengal and four teams for Kolkata for flood relief/rescue operations.DNA - Published | |
Cyclone of arrogance still hovering over Bay of Bengal: Shiv Sena on Centre-Bengal tussleIndiaTimes - Published | |
'Mann Ki Baat': Cyclone-affected states showed courage, fought battle with patience and discipline, PM saysIndiaTimes - Published | |
Indian Coast Guard teams on stand-by, fishermen, sailors alerted for Cyclone 'Yaas' on East CoastWith a low-pressure area off Andamans expected to intensify into Cyclone 'Yaas', the Indian Coast Guard has already swung into action.DNA - Published | |
Cyclone leaves 17 dead in Maharashtra too; 28 badly hurtA day after cyclone Tauktae battered Maharashtra’s coast, the death toll rose to 17, while 28 people were critically injured and at least two fishermen from Sindudhurg district were still missing...IndiaTimes - Published | Cyclone tears off roofs and cuts power to thousands in Western Australia![]() Sky News - Published |
Cyclone 'Nisarga' to hit Maharashtra coastline with high wind speed, heavy rainfall: Top developmentsIndiaTimes - Published | PM Modi arrives in Cyclone-hit West Bengal; received by Mamata Banerjee at airportThe governor will accompany the Prime Minister and the Chief Minister on the aerial survey in the state.DNA - Published |
Cyclone leaves trail of devastation along coast of eastern India, BangladeshRescue teams searched for survivors in eastern India and Bangladesh a day after the most powerful cyclone in over a decade devastated coastal villages, destroying mud houses, ripping out electricity..Reuters - Published | Cyclone kills 14 in India, Bangladesh leaving trail of destructionA powerful cyclone pounded eastern India and Bangladesh on Wednesday, killing at least 14 people and destroying thousands of homes, officials said, leaving authorities struggling to mount relief..Reuters India - Published Also reported by •Reuters |
Cyclone 'Amphan' LIVE updates: NDRF teams deployed in Odisha to shift villagers to sheltersOdisha and West Bengal state government have started evacuating people from coastal areas to safer places in view of the warning of strong winds and heavy rains.DNA - Published |