discuss the stage of development of the tropical cyclone nivar discuss the stage of development of the tropical cyclone nivar

It typically moves in a counterclockwise direction north of the Home However, the most damaging winds and heaviest rain are all concentrated within the innermost 200km of the storm. As the heated air column is lighter, the surface pressure gradually decreases. The calm eye of the storm measures between 20 and 40 miles wide. Please login to continue. A strong pressure gradient rapidly developed within the system as it headed west resulting in a category rating of 5 by 8 March. Meteorological phenomena It is likely to hit the Tamil Nadu coast. The epidemiology. Tropical storms can reach up to 400 miles wide and up to five miles high. Lots of moisture through the depth of the atmosphere. Heavy rainfall from a cyclone is usually spread over wide area and cause large scale, Apart from these Cyclones also create destructions such as. [15] Five people were reported dead in Tamil Nadu. Therefore, there are different stages of a tropical cyclone and they are: Tropical disturbance, The return to the surface is accomplished with the downward flow that predominates at large distance. PRESS AND MEDIA Answer: Conclusion of Cyclones. It is the largest singular and specialised disaster force in the world. Sizeable environmental destruction also occurred with over 1000 trees being uprooted by the storm. This is referred to as large winds that circulates about a centre which has low atmospheric pressure. In the peripheral zone, hundreds of kilometres beyond the core, the horizontal flow is less symmetrical and the radial component of the wind is proportionally larger. (ii) High relative humidity of the atmosphere to a height of above 7,000 m facilitates condensation of water vapour into water droplets and clouds, releases heat energy thereby inducing a drop in pressure. [2], Red warnings were put in place for northern Sri Lanka, with the threat of heavy rainfall in the region. 1 Kensington Gore, As per the guidelines of the World . In late January 2021, Tropical Cyclone Eloise caused widespread damage and heavy flooding in central Mozambique. Several factors result in tropical storms weakening. explains thedifferencesbetween these powerful spinningstorms. In the early hours of November 24, it intensified into a cyclonic storm and it was named Nivar. Be part of our community by following us on our social media accounts. A result of the mechanism for development described here is that the most severe weather, the heaviest rain and strongest winds, is strongly focused in the centre of the cyclone. A TropicalDisturbance is a persistent thunderstorm region with moderate winds that outline an overall rotation. More on the news: Red alert issued in TN and Puducherry : The India Meteorological Department has forecast the development of a cyclone in the Southwest region of the Bay of Bengal, off Tamil Nadu coast. Tropical cyclones do not form spontaneously from nothing. There are three elements associated with cyclones that cause destruction during its occurrence. On the next day, both agencies upgraded the system to a tropical storm, with the latter assigning it the name Nivar. It was suggested by Iran. discuss the stage of development of the tropical cyclone nivar. According to the India Meteorological Department (IMD), Cyclone Nivar, which crossed the TN coast as a very severe cyclonic storm with wind speeds of 120 kmph and rain-filled, further weakened as it moved inland. Privacy Policy 8. Copy. The depression is moving toward the northeast near 15 mph (24 kph) and is forecast to become extratropical late today while accelerating to the east-northeast. The spatiotemporal distributions and physical-optical properties of aerosols are of great scientific significance for the study of climate change and atmospheric environment. Further down, friction on the ocean surface slows it down. Tropical Cyclone Eloise, a category 2 storm, made landfall in the first hours of 23 January 2021, 20km south of the Beira City in Sofala Province, bringing winds of 140km/h and wind gusts of. 2023 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. [5] Measures were taken by the Tamil Nadu government to store dry rations and fuel for the people after the cyclone's impact. The coupling between primary and secondary circulations implies that the Eyewall cannot be stable. Shown here is Alex, as a tropical storm on both August 1 and August 2, 2004. Tropical cyclones extract their energy from the heat stored in the tropical oceans and transform it into fierce winds, devastating rains, monstrous waves that devastate the lands they approach. The storm has been named Cyclone Nivar, based on the guidelines of the World Meteorological Organisation (WMO). It intensified into a depression on the early hours of November 23. If you can it would be an excellent test of both numeracy and your knowledge of latitude and longitude. The above figure shows how cyclones form. "Global Catastrophe Recap in November 2020", "Update on Cyclone Gati and Depression BOB 04", "India, Sri Lanka Tropical cyclone NIVAR (GDACS, JTWC, IMD, Department of Meteorology Sri Lanka) (ECHO Daily Flash of 24 November 2020)", "Cyclone Nivar live | TN deputes 10 top police officers to monitor rescue and relief works", "Trains and buses cancelled, NDRF teams on alert: Here's how Tamil Nadu is bracing for Cyclone Nivar", "Cyclone Nivar: PM Modi Assures Complete Support to TN, Puducherry", "Nivar: Possible flight disruption to statewide holiday in TN 10 updates", "Over 1 lakh people evacuated in Tamil Nadu & Puducherry as cyclone Nivar intensifies", "1 Dead, Thousands Evacuated As Cyclone Nivar Brings Heavy Rain In Andhra", "Cyclone Nivar: IMD issues yellow alert in Karnataka", "Cyclone Nivar: Chennai Corporation evacuates 478 residents from low-lying areas", "Gates of Chembarambakkam reservoir opened after 5 years", "Inundation plagues residents in and around city suburbs", "Cyclone Nivar: Chennai Corporation clears 223 roads of uprooted trees, restores traffic", "Cyclone Nivar impact: Heavy rains batter Pondicherry, trees uprooted", "Tentative Loss Of Rs 400 Crore Due To Cyclone Nivar: Puducherry Chief Minister", "Cyclone Nivar claims eight lives in Andhra Pradesh", "Cyclone Nivar | Three killed, crops damaged as storm crosses Tamil Nadu coast", "Nivar causes a loss of 5.07 crore to SPDCL", https://en.wikipedia.org/w/index.php?title=Cyclone_Nivar&oldid=1075064428, Short description is different from Wikidata, Wikipedia articles in need of updating from November 2020, All Wikipedia articles in need of updating, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 3 March 2022, at 18:15. Information identified as archived is provided for reference, research or recordkeeping purposes. Tropical cyclones are one of the biggest threats to life and property even in the formative stages of their development. Small variations in the vertical wind speed; A pre-existing weak low-pressure area or low-level-cyclonic circulation is must for cyclone formation in tropics. A tropical cyclone is an intense circular storm that originates over warm tropical oceans and is characterized by low atmospheric pressure, high winds, and heavy rain. [19] Loss of APSPDCL was amounted to be 50.7million (US$687,000).[20]. The North Atlantic generates an average of 10 depressions and storms, resulting in about 5 hurricanes per year. This effect leads to a temporary decrease in the intensity of the cyclone when the Eyewall progressively dissipates, before a new intensification when the external bands have gradually organized themselves into a new Eyewall. You can unlock new opportunities with unlimited access to hundreds of online short courses for a year by subscribing to our Unlimited package. This site is using cookies under cookie policy . Following work by Zeke Hausfatherxxviii, we have analysed the probability density of tropical cyclone formation by category against sea-surface temperature. Cyclone Nivar is the second cyclone to form over the Bay of Bengal this year after Super Cyclone Amphan. Warnings were issuedtocoastal areas and fishermen were advised not to go out to sea. Accessibility All types of tropical storms form in the same way, starting with a tropical disturbance. Figure 6. a) Formation and initial development (b) Full maturity (c) Modification or decay! Context: The Bay of Bengal will see its second Severe Cyclone of the year, after Super Cyclone Amphan formed earlier this year. This movement dries the air, the cloud mass dissipates locally and the Eye of the cyclone appears. The Met Office website has an informative section on tropical cyclones. In a phenomenal re-birth, Ingrid rapidly re-intensified, going from tropical storm strength back to a Category 4 cyclone with maximum sustained winds estimated at 120 knots (138 mph) by the Joint Typhoon Warning Center in the span of just 12 . Cyclone Jolane over the South Indian Ocean on 9 April 2015 at 9am UTC shows a wide external band to the east (the colour code indicates the cloud top temperature). All types of tropical storms form in the same way, starting with a tropical disturbance. PGDM; Specialisations. Hurricanes reaching Category 3 and higher are considered major hurricanes because of their potential for significant loss of life and damage. Of all the weather systems on Earth, tropical cyclones produce some of the most intense and damaging weather. The naming difference between cyclones, hurricanes and typhoons is used to indicate the geographical origin. Across all the three provinces, homes were partially or completely destroyed, families. 1/18/21 it grew to a strong tropical storm with winds to 60 mph. Meanwhile, Chennai received 1497.60 mm of rainfall in the last 24 hours 9 (till 6 am). These cloud columns eventually cluster together, forming into thunderstorms. Thankfully cyclones are rather inefficient engines, converting less than 10% of the available heat energy from condensation in the clouds into the mechanical energy of the motion of the winds. come dine with me county durham tina nesbitt. [8], The District magistrate of the Nellore district of Andhra Pradesh reported that 3,363 people were sheltered in 115 relief camps. Tropical Disturbance INVEST 99S that spawned Eloise was first noted on 14 January as it entered a region marginally favourable to development. This is about 50% more destructive than the winds of Hurricane Juan (2003). Cyclone Nivar - Important Facts. [Source: http://www.atmos.umd.edu/~stevenb/hurr/]The Eye of the cyclone is a clear and dry area at medium and high altitude, often loaded with clouds in the lower layers where the air is almost saturated with moisture. Learn new skills with a flexible online course, Upskill with a series of specialist courses, Earn professional or academic accreditation, Study flexibly online as you build to a degree. Several roads were closed in the area of the Greater Chennai Corporation were closed due to waterlogging. Other changes also occur when a cyclone interacts with relief, when passing over fairly large mountainous islands, such as Luzon in the Philippines, Taiwan, Hispaniola in the Caribbean, or on a coastal barrier such as the Central American Cordillera. The location of India in the north Indian Ocean makes it vulnerable to the tropical cyclone. The probability of such transitions varies according to the configuration of the ocean basin: non-existent over the northeast Pacific or northern Indian Ocean, rare over the southwest Pacific or southeast Indian Ocean, it affects about one in five cyclones over the southwest Indian Ocean, one in four over the northwest Pacific, one in three over the north Atlantic. Discuss the stage of development of the tropical cyclone under research. Hurricane Alex, the first major hurricane to enter Canadian waters in over 20 years*, was a Category 3 storm as it moved into Canadian waters. During the last 40 years, six cyclones oftheseverestcyclone category,hit the Tamil Nadu coast in November. Saffir-Simpson Scale: The Beaufort Scale classifies all ocean storms with surface-level winds above 32.7 m s -1 as hurricanes. Driven by her love and fascination with all animals behavior and care, she also gained a Certificate in Captive Wild Animal Management from UNITEC in Auckland, New Zealand, with work experience at Wellington Zoo. Nivar made its landfall over north coastal Tamil Nadu between Puducherry and Chennai close to Marakkanam. 26-01-2021 13:47. The change in the distribution of storm activity temporarily disrupts the cyclones dynamics. In the eye, the slight downward movement of the air induces a heating that strengthens the central depression, attracts outside air from the lower layers and ensures that the cycle is maintained. Winds in the eye of the storm are calm, typically up to 15 miles per hour, and there is no rain here because cool air sinks in the eye. This is not the result, as has long been believed, of the presence of large-scale thunderstorm instability. This scale estimates potential property damage. They are largely deployed for floods, cyclones, building collapse and earthquakes in India. It is likely to hit Tamil Nadu coast by midweek. In the North Atlantic Ocean and the Caribbean Sea, this weather pattern is called a hurricane. It feeds the clouds of the cyclone and only a small part reaches the eye. Tropical Cyclone Eloise made landfall in Mozambique on Saturday, with the outer bands of the storm sweeping across South Africa, Zimbabwe and Eswatini. When tropical cyclones reach land, giant waves and strong winds can cause large-scale damage and flooding. If the area of thunderstorms in a tropical disturbance organizes in such a way that a rotation develops and winds become strong (20 knots or 37 km/h), the system is upgraded to a tropical depression and it is given a number. It subsequently weakened into a cyclonic storm (CS), but not . But why does an eye form? Stages of Formation: Tropical Cyclones. The Saffir-Simpson Hurricane Wind Scale rates a hurricane's strength from 1 to 5. Convective bands circulated around a large and loosely formed eye, and the clouds associated with the storm stretched more than 1,000 . Beyond that, it is a "Tropical Cyclone", also called a "Hurricane" on the Atlantic and northeast Pacific, a "Typhoon" on the northwest Pacific. On this Wikipedia the language links are at the top of the page across from the article title. Prohibited Content 3. For large weather systems, the circulation pattern is in a counterclockwise direction in the Northern Hemisphere and a clockwise direction in the Southern Hemisphere. Meteorologists have divided the development of a tropical cyclone into four stages: Tropical disturbance, tropical depression, tropical storm, and full-fledged tropical cyclone. But few cyclones reach their maximum potential intensity because the details of internal circulation are more complex than the previous diagram, and the efficiency of energy conversions is rarely optimal. The storm system is likely to move northwestwards and weaken into low pressure. Cyclone Nivar, pictured on November 25th at its peak strength. But conditions at sea and when the storm comes ashore vary widely depending on the wind speed. Read about Amphan and few basics in ForumIAS blog by clicking here. These are: Warm ocean temperatures, greater than 26C to a depth of at least 60m. According to the definition of the World Meteorological Organization (WMO), tropical cyclones are atmospheric disturbances of a few hundred kilometres wide scale, originating over tropical or sub-tropical waters and presenting an organized thunderstorm activity and a cyclonic circulation[1], more intense at the surface than at altitude. Trees were uprooted, electric poles were damaged and several areas were flooded as of November 26. Converging winds over the ocean then force hot air into the atmosphere, where it cools and forms storm clouds. While rains are expected in southern Andhra Pradesh, a deep depression is brewing over the Bay of Bengal and is most likely to turn into a severe cyclonic storm by Tuesday and cross the coast on Wednesday, according to the Indian Meteorological Department (IMD). There were an estimated 175,000 people in rescue sheltersbyWednesday night, 25 November. Their distribution shows a first maximum in May June and another secondary in October November. In the Eyewall of cumulonimbus clouds, which surrounds the eye a few tens of kilometres from the circulation centre, there are powerful vertical motions with the highest precipitation, organised in narrow spiral bands or rings, and the strongest winds frequently reach 200 km/h, sometimes exceeding 300 km/h. Canadian Environmental Protection Act (CEPA) Environmental Registry, Ministerial and Governor-in-Council appointments. The southeast of this ocean and northern Australia produce an average of 7 depressions and storms, and 3 cyclones per year. Explanation: Tropical disturbance, tropical depression, tropical storm, and full-fledged tropical cyclone. All of the systems described here have emphasised the greater intensity of the weather patterns in the Tropics which is a response to the large amounts of energy received from the Sun at tropical latitudes. These bands spiral inwards and form a dense highly active central cloud core which wraps around a relatively calm and cloud free eye. This includes information on how they are named and categorised, maps of the tracks of all cyclones since 1992, notes on how the storms are forecast and links to information on how climate change may affect the formation of these systems in the future. The transfer of heat and humidity from the ocean to the atmosphere restores energy to this fresh air. Build your knowledge with top universities and organisations. On the night of 25 November, at 11.30pm, cyclone Nivar began its landfall at Puducherry on the Tamil Nadu coast. The upward movement induces a compensatingdownward movement in the Eyeand an acceleration of the surface windat a distance a little closer to the circulation centre. Although tropical cyclones help to moderate climate by transferring energy from warm equatorial regions to cooler higher latitudes, the combined effects of their extreme wind, precipitation, and storm surge threaten the lives of millions of people who live near the coast. Whether you need help solving quadratic equations, inspiration for the upcoming science fair or the latest update on a major storm, Sciencing is here to help. : 07AADCF4830D1Z0, Bills and Acts Tracker for UPSC IAS Examination, History and Art & Culture articles in News, Prelims 2022 Study Material- Learn with ForumIAS, Monthly Current Affairs For UPSC PDF Download, Prelims 2022 Study Material- Learn with ForumIAS , [Download] KRITIKA SHUKLA AIR 123 (UPSC CSE 2021) MGP Test Copies + Testimonial, [Download] Vivek Tiwari AIR 164 (UPSC CSE 2021) MGP Test Copies + Testimonial, [Download] Utsav Pandey AIR 240 (UPSC CSE 2021) MGP Test Copies + Testimonial, Shraddha Gome IAS Rank 60 (UPSC CSE 2021) Testimonial, Rahul Raiya CSE Rank 359 (UPSC CSE 2021) Testimonial, IAS Rank 1 Anudeep D Testimony & Copies , Fighting Depression in Times of UPSC Preparation ( & Corona ) , Guide : How to crack IAS without exhauting attempts, History | Art and Culture Updates and News, International Relations News and Updates. This diagram represents an ideal thermodynamic cycle of Carnot and makes it possible to estimate a Maximum Potential Intensity, minimum pressure or maximum wind, that a cyclone can reach in an environment characterized by its latitude, the temperature of the ocean and that of the tropopause at about 15 kilometers of altitude. Before becoming a freelance writer, Adrianne worked for many years as a Marine Aquaculture Research Technician with Plant & Food Research in New Zealand. what challenge do they face? The tropical cyclone struck Puducherry,adistrictin Tamil Nadu,with apopulation of1.6 millionpeople. Eloise is the seventh tropical depression fourth named storm, and third severe tropical storm of the 2020-2021 South West Indian Ocean Cyclone Season. [17], Eight people were reported dead in Andhra Pradesh. A tropical cyclone begins to weaken in terms of its central low pressure, internal warm core and extremely high winds as soon as its source of warm moist air being to ebb or are abruptly cut off. National Ocean Service: What Is the Difference Between a Hurricane and a Typhoon? This involves evaporation of water from the ocean surface, condensation within clouds and strong rising motion within the clouds that in turn leads to stronger surface winds and more evaporation. This cycle continues, making cloud columns spin faster and wind speeds increase. Tropical waves are particularly important in the creation of tropical cyclones--60% of Atlantic cyclones (85% of the intense ones) form from these weather disturbers. There are four stages of tropical cyclones, which are tropical disturbance, tropical depression, tropical storm and hurricane or typhoon. UsethisAdministrative map of India Nations Online Project(which helpful identifies Puducherry, where cyclone Nivar made landfall)andthis table dataWeather Underground,to chart how this tropical storm developed. The force that attracts air to the low pressure centre is balanced by the Coriolis force and by the centrifugal acceleration of an overall cyclonic movement, reinforced by the aggregation of the various successively created eddies. [9], On November 26, the IMD issued yellow alert in several parts of Karnataka including Bengaluru. Therefore, there are different stages of a tropical cyclone and they are:Tropical disturbance, Read more about tropical cyclones here:brainly.com/question/26403068, Meteorologists have divided the development of a tropical cyclone into four stages. This was later rescindedby 26 November. Left: light eye of Hurricane Rita, in Category 5 on September 22, 2005 at 12:18 UTC; right: cloudy eye of the same hurricane in Category 3 on September 23 at 23:16 UTC. An example of acompletecyclone trackermap The India Meteorological Departmentis belowtoillustratehowit should look. On 1/23/21 Eloise became a CAT 2 cyclone and it hit Mozambique with winds between 96 and 110 mph causing widespread flooding and . These are created when the air at the top of the thunderstorm rises to heights where it begins to cool, then becomes unstable. Rain is a serious problem for the people which become shelter less due to cyclone. Carried by powerful updrafts to an altitude of about 15 kilometres, the cloudy air moves away from the centre of the cyclone in a divergent and anticyclonic movement, and loses energy by thermal radiation towards space. The development of a tropical cyclone disturbance requires specific conditions: Above 5 to 10 latitude, the Coriolis force [3] due to the Earths rotation has a sufficient amplitude for the thermal wind balance to require that a persistent warm anomaly at altitude be accompanied by a cyclonic wind rotation whose intensity decreases with altitude. Cyclones rely on the development of tall columns of convective cloud which extend of the order of 10 km in the vertical. Under these conditions, small or low-intensity cyclones dissipate fairly quickly, but the strongest and most extensive ones maintain their organization and intensity, sometimes for several days. Firstly, the ocean temperature must be at least 80.6 degrees Fahrenheit. Can you chart the course of cyclone Nivar? Surface winds reported in tropical cyclones follow an international standard: they are maximum sustained winds averaged over 1 minute, taken at the 10-m level (33 feet) above the surface away from buildings, structures and friction of the ground. Copyright 10. 'Amphan', which was proposed by Thailand, was the last name in the 2004 series. A few tropical cyclones interact with the westerly circulation and evolve into a mid-latitude (baroclinic)storm. In terms of the life cycle of a tropical cyclone, which on average lasts for nine days, it passes through four phases as well. discuss the stage of development of the tropical cyclone nivarright guard sport antiperspirant. Adrianne Elizabeth is a freelance writer and editor. houseboat netherlands / brigada pagbasa 2021 memo region 5 / discuss the stage of development of the tropical cyclone nivar. The two main categories of cyclones are tropical (forming in the tropics) and extra-tropical (forming outside of the tropics). An increase in vertical wind shear can also bring about the decay of a tropical cyclone. This deep cloud often forms an almost circular ring called the eyewall around the very centre of the storm which is itself free from clouds. The northern Indian Ocean accounts for only 5% of the world total, but due to the shallow depth of the Bay of Bengal, low coastal elevations and high population densities, they often cause considerable damage. Communications & Marketing Professional. First is a ring-shaped outer region, typically having an outer radius of about 160 km (100 miles) and an inner radius of about 30 to 50 km (20 to 30 miles). A "Tropical Depression" is characterized by closed circulation and winds blowing at less than 17 m s-1 (about 60 km/h). If the wind is changing too much with height, these columns of cloud cannot form through a great enough depth of the atmosphere as the tops will be constantly blown away. A tropical disturbance occurs when warm water vapor rises off the ocean into the atmosphere, condensing into large cloud columns as it cools. We will not use your details for marketing purposes without your explicit consent. This article discusses in detail the development of tropical cyclones, a type of storm and natural disaster that wreaks havoc on human life. Strong winds causing a shear at altitude (25000 to 60000+ feet) interrupts that flow minimizing development. As viewed by weather satellites and radar imagery, the mean physical feature of a mature tropical cyclone is a spiral pattern of highly turbulent giant cumulus thunder cloud bands. On March 11, 2005, a greatly-weakened Ingrid re-emerged over open water in the Gulf of Carpentaria. Large sea surface with temperature higher than 27 C; Presence of the Coriolis force enough to create a cyclonic vortex. Immediately, the Joint Typhoon Warning Centre gave a TCFA and designated unofficially as Tropical Cyclone 04B. Alternatively,sketchthechoropleth map for Thursday 25 Novemberbelowthe Weather Channel. Abstract and Figures Tropical storms form in the Bay of Bengal every year during the pre-monsoon season, affecting the coastal communities and the marine ecosystem. The storm developed as Tropical Depression Eight. When tropical cyclones reach land, giant waves and strong winds can cause large-scale damage and flooding. Following four atmospheric and oceanic conditions are necessary for development of a cyclonic storm. [Source: NRL Monterey Marine Meteorology Division http://www.nrlmry.navy.mil/sat_products.html]Primary and secondary circulations cooperate in the functioning of cyclones. The Moderate Resolution Imaging Spectroradiometer (MODIS) on board NASA's Aqua satellite acquired a true-color image of Tropical Cyclone Nivar on November 24 as it moved northwest off the coast of Sri Lanka. IMD is the principal agency for all matters relating to meteorology and allied subjects such as weather forecasting and seismology etc. discuss the stage of development of the tropical cyclone nivar. discuss the stage of development of the tropical cyclone nivar. Figure 4. Cyclone Nivar: Chennai witnesses strong winds, trees uprooted in many parts As the system develops the Earths rotation acts on the inrushing winds, deflecting them into a pattern that rotates about the centre of the storm, spiralling in towards the centre. Alexs sustained winds in Canadian waters were estimated at 180 km/h. To form a cyclone, warm, moist air over the ocean rises upward from near the surface. Combined, these hazards interact with one another and substantially increase the potential . Originally a low-pressure system north of the Gulf of Carpentaria, Ingrid moved eastward and developed into a tropical cyclone in the Coral Sea on 6 March 2005. Officials were also directed to ensure that people in vulnerable areas were evacuated. The result is a tendency for the Eyewall to gradually shrink. Admission Process; Fee Structure; Scholarship; Loans and Financial aid; Programs. The largest losses of human life due to weather events are also associated with these systems, with death tolls sometimes into the 100s and even 1000s. Very Severe Cyclonic Storm Nivar was a tropical cyclone which brought severe impacts to portions of Tamil Nadu and Andhra Pradesh in late November 2020. Tropical cyclones only form over oceans, never over land, as they need sources of both heat and moisture. Cyclone Nivar was expected to make a landfall tomorrow morning in Puducherry and in the wake of the strong winds, heavy rains were forecast from morning Wednesday. Whilst intense storms are very common throughout the Tropics, tropical cyclones need a very specific set of ingredients in order to form. The thick storm clouds that surround the eye of the storm are called the eyewall. Only half of cyclones reach the next stage, which is full maturity where the cyclone develops a distinct eye. Cyclone Nivar has caused devastation, injuries and fatalities after making landfall in southern India where torrential rainfall has lashed coastal areas of the union territory of Puducherry and Tamil Nadu state. Alex eventually strengthened to a Category 3 hurricane as it moved through Canadian waters. 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. If this water is very much cooler than the surface, the supply of heat to the system will be reduced. The National Herald of India reported on 24 November that the Puducherry district administration imposedprohibitoryorders to stop the movement of people in public, issuing the directive under Section 144CrPc. It is the largest singular and specialised disaster force in the world.