What actually causes a Tropical Cyclone to start?

<< Back to: FAQ: HURRICANES, TYPHOONS AND TROPICAL CYCLONES (Part 1 of 2)

Answer by haBIb
Submitted on 12/9/2004
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hey guysss.....how de doody im here today to talk about cyclones! cyclones are caused by techtonic and atmospheric conditions.cyclones start as a low dept\ression on the seas surface then build up and move inland slowly breaking up thats why cyclones are found along the coast and not right inland. and thats how cylclones are formed! now getting back to the weekend what r u doing? im going tooooooo go to a place near that place u no where im talking bout????????? well rebebeca does! because shes going to the same place! hi rickydog! hay <*kerm!+y>.... n n@rT..hay el!! and ellie yew tobz hay amys!!elle G in the house nd apey!! adn all u bootifuls..by the way all u ppl that hav sed stuff on this site r KEBABS!!! by the way come to my shop my name is habib!come come! ps.BAKLAVAH!

Answer by Smart1
Submitted on 3/3/2005
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another term for hurricane. tropics the area between the tropics of Cancer and Capricorn, defined by the parallels of latitude approximately 23�30' N and S of the equator. They are the limits of the area of Earth's surface in which the Sun can be directly overhead. troposphere lower part of the Earth's atmosphere extending about 10.5 km from the Earth's surface. truncated Spur blunt-ended ridge of rock jutting from the side of a glacial trough, or valley. tsetse fly blood-feeding insect that carries trypanosomiasis, or sleeping sickness. tsunami wave generated by an undersea earthquake or volcanic eruption. tundra region of high latitude almost devoid of trees, resulting from the presence of permafrost. The vegetation consists mostly of grasses, sedges, heather, mosses, and lichens. Tundra stretches in a continuous belt across N North America and Eurasia. twilight zone another term for transition zone. typhoon violently revolving storm, a hurricane in the W Pacific Ocean.

Answer by peter
Submitted on 3/8/2005
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Cyclones are formed or developed when the warm front meets with the cold front. A warm and moist air rises. The rising of the air creates a low pressure which actually develops the centre which is called the eye of a cyclone. Around it, a warm air will rises upwards in a spiral or twisty way. During this procedure, cool air that comes from an area with a high pressure quickly goes into the position it has left at its base. They actually get there energy from the warm water and that is why it would usually not beginning on land. Also temperature of the water has to be at least 80 F so a cyclone can be caused. centreJust a little fact: Cyclones are also called hurricanes or typhoons.

Answer by Jimaima
Submitted on 8/5/2005
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To undergo tropical cyclogenesis, there are several favourable precursor environmental conditions that must be in place (HRD, NOAA2): Warm ocean waters (of at least 26.5oC [80oF]) throughout a sufficient depth (unknown how deep, but at least on the order of 50 m [150 ft]). Warm waters are necessary to fuel the heat engine of the tropical cyclone. An atmosphere which cools fast enough with height such that it is potentially unstable to moist convection. It is the thunderstorm activity which allows the heat stored in the ocean waters to be liberated for the tropical cyclone development. Relatively moist layers near the mid-troposphere (5 km [3 mi]). Dry mid levels are not conducive for allowing the continuing development of widespread thunderstorm activity. A minimum distance of at least 500 km [300 mi] from the equator. For tropical cyclogenesis to occur, there is a requirement for non-negligible amounts of the Coriolis force to provide for near gradient wind balance to occur. Without the Coriolis force, the low pressure of the disturbance cannot be maintained. A pre-existing near-surface disturbance with sufficient vorticity and convergence. Tropical cyclones cannot be generated spontaneously. To develop, they require a weakly organized system with sizable spin and low level inflow. Low values (less than about 10 m/s [20 kts 23 mph]) of vertical wind shear between the surface and the upper troposphere. Vertical wind shear is the magnitude of wind change with height. Large values of vertical wind shear disrupt the incipient tropical cyclone and can prevent genesis, or, if a tropical cyclone has already formed, large vertical shear can weaken or destroy the tropical cyclone by interfering with the organization of deep convection around the cyclone center.

Answer by sapta
Submitted on 1/15/2006
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Cyclones are born in the hot, humid summer environment of the tropics (November to April in the South Pacific). As the sun warms the oceans, evaporation and conduction transfer heat to the atmosphere so rapidly that air and water temperatures differ by a very small amount. The water vapor generated by such evaporation is the fuel that drives a tropical cyclone, because as the vapor condenses into clouds and precipitation it pumps enormous amounts of heat into the cyclone. The fuel supply is controlled by the evaporation rate--which explains why cyclones cannot develop when the ocean temperature is below 26�C . Another ingredient that must be present for formation is the Coriolis force or spin (The Coriolis effect is the force caused by the earth's rotation that deflects a moving body to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.) This force is zero at the equator. This is why cyclones cannot form right on the equator. In the South Pacific, cyclones normally form between 5 and 15 deg. South. In order for a cyclone to get going also there is a need for a jet stream (high velcity wind) to be present in the upper atmosphere. This is so it can remove the top layers at a rate as to allow more energy to be fed into the lower levels

Answer by Rella_91
Submitted on 4/10/2006
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Man, this site is weird,i came here looking for an answer to the question and all i find is these weird comments and one very good detailed answer (thanks smartass by the way you helped me with my assignment) Ok it says Q&A so isn't this site supposed to give you the answers? Oh well, people who made this site i hope you've learned your lesson by all the annoyed comments posted on this site. Thankyou for your time and i need to finish my assignment now goodbye!!!! and if you desperately need to know how a cyclone is formed go to enchantedlearning.com it may seem like it's for little kids but it has good diagrams!!!! here's some notes: The seven main characteristics that define a tropical cyclone, including a hurricane, are: � Hurricanes have no fronts. � Hurricane winds weaken with height � The centers of hurricanes are warmer than their surroundings � Hurricanes and tropical systems form under weak high-altitude winds. � Air sinks at the center of a hurricane � Hurricanes' main energy source is the latent heat of condensation � Hurricanes weaken rapidly over land Bye!!!!

Answer by Claire
Submitted on 4/27/2006
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Hey, to all those people who come here to look for answers well then good for you, I came here too, to look for answers. And I'd like to thank all those people who did give an answer, even if it was thought to be inaccurate, it means alot to those who care. But to all those people who accuse other people of being stupid idiots and telling THEM to grow brains. I don't think you've thought about what you've been answering. Oh wait yeah I remember you cant think, YOU'RE the ones without a brain. Before you start calling others dumb asses, I'd first like to see you try and give your best answer. Show respect, at least these people try. Don't think that the answer is just gonna be given to you on a silver platter...

Answer by Nerd_01
Submitted on 5/19/2006
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Here's a good answer: The exact mechanism that "triggers" a cyclone is not fully understood. If conditions are right an ordinary tropical depression or "low" can develop into a tropical cyclone. In the southern hemisphere the winds spiral in a clockwise direction towards its centre where they rise and spill over in an outward flow at high altitude. Summer heat beating on the warm ocean evaporates water creating a deep layer of moist air. The uplift of this moist air in the centre of a low cools it causing the intense rain characteristic of tropical cyclones. Higher in the upper levels the rising air spirals outward removing air faster than it flows in resulting in a fall in barometric pressure. Cyclones vary greatly in character but the one feature they all have in common is a virtually calm centre. This centre or "eye" is generally about sixteen to thirty-two kilometres across. Around this eye are bands of heavy cloud associated with the moist air which spirals in towards the centre of the cyclone.

Answer by malaika
Submitted on 7/29/2006
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It can take anywhere from hours to several days for a thunderstorm to develop into a hurricane. Although the whole process of hurricane formation is not entirely understood, three events must happen for hurricanes to form: A continuing evaporation-condensation cycle of warm, humid ocean air Patterns of wind characterized by converging winds at the surface and strong, uniform-speed winds at higher altitudes A difference in air pressure (pressure gradient) between the surface and high altitude Warm, moist air from the ocean surface begins to rise rapidly. As this warm air rises, its water vapor condenses to form storm clouds and droplets of rain. The condensation releases heat called latent heat of condensation. This latent heat warms the cool air aloft, thereby causing it to rise. This rising air is replaced by more warm, humid air from the ocean below. This cycle continues, drawing more warm, moist air into the developing storm and continuously moving heat from the surface to the atmosphere. This exchange of heat from the surface creates a pattern of wind that circulates around a center. This circulation is similar to that of water going down a drain. Photo courtesy NASA This photo is a composite of three days' views (August 23, 24 and 25, 1992) of Hurricane Andrew as it slowly moved across south Florida from east to west. "Converging winds" are winds moving in different directions that run into each other. Converging winds at the surface collide and push warm, moist air upward. This rising air reinforces the air that is already rising from the surface, so the circulation and wind speeds of the storm increase. In the meantime, strong winds blowing at uniform speeds at higher altitudes (up to 30,000 ft / 9,000 m) help to remove the rising hot air from the storm's center, maintaining a continual movement of warm air from the surface and keeping the storm organized. If the high-altitude winds do not blow at the same speed at all levels -- if wind shears are present -- the storm loses organization and weakens. High-pressure air in the upper atmosphere (above 30,000 ft / 9,000 m) over the storm's center also removes heat from the rising air, further driving the air cycle and the hurricane's growth. As high-pressure air is sucked into the low-pressure center of the storm, wind speeds increase.

Answer by WoGg_dAwGgZ
Submitted on 9/21/2006
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Haha if anyone visits this site it just a chat room hahahhahah if you want the aswer it is: A cyclone is caused by tectonic and atmospheric conditions. Cyclones start as a low depression on the seas surface then build up and move inland, slowly breaking up. Thats why cyclones are found along the coast and not right inland. Cyclones are in categories just like hurricanes or typhoons. Cat. 1: strongest gust less then 125km/h Cat. 2: strongest gust 125 - 170 km/h Cat. 3: strongest gust 170 - 225 km/h Cat. 4: strongest gust 225 - 280 km/h Cat. 5: strongest gust more than 280 km/h Cyclones are just like hurricanes and typhoons, in every way, besides the ocean they form in. They form when a low pressure area encounters favorable conditions, including water temperatures of around 80 degrees F at least, weak upper-level winds (called shear) that do not destroy the thunderstorms, and a good environment for ventilation. In order for the cyclone to grow and expand, it needs to receive energy (from the warm water), use the energy, and then let it out. A cyclone can not form without the necessary requirements, and can not become powerful without everything being perfect for development. i hope this helped.... WoGg_dAwGgZ productions... if you want more email at ynohtna_53@hotmail.com

Answer by Chrissi
Submitted on 4/21/2007
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Tropical cyclones can produce extremely strong and powerful winds, tornadoes, torrential rain, high waves, and storm surge. They are born and sustained over large bodies of warm water, and lose their strength over land. This is the reason coastal regions can receive significant damage from a tropical cyclone, while inland regions are relatively safe from receiving strong winds. Heavy rains, however, can produce significant flooding inland, and storm surges can produce extensive coastal flooding up to 25 mi (40 km) inland. Although their effects on human populations can be devastating, tropical cyclones can also relieve drought conditions. They carry heat away from the tropics, an important mechanism of the global atmospheric circulation that helps maintain equilibrium in the Earth's troposphere.

Answer by Jenny
Submitted on 6/5/2007
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Cyclones are caused by tectonic and atmospheric conditions. They form when the surface temperature reaches 27 degrees celsius. People use the adjective "tropical" because most cyclones form in tropical regions where the water temp. reaches 27 degrees celsius. Cyclones are caused by high pressure and low pressure systems meeting, making the air start to spin inwards, and eventually, a cyclone forms. All cyclones, depending on the speed of the cyclone, are divided into 5 categories. Like a category 1 cyclone (wind speeds under 125km/h) does almost no house damage, while a category 5 cyclone (wind speeds over 280km/h) can cause wide spread power failures. Cyclones are known as hurricanes in North America, and Typhoons in Asia.

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Question by Kell
Submitted on 10/20/2003
Related FAQ: FAQ: HURRICANES, TYPHOONS AND TROPICAL CYCLONES (Part 1 of 2)
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What actually causes a Tropical Cyclone to start?

Answer by disterbed customer
Submitted on 3/17/2004
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i dont no, u tell me, thats why i came to this website.

Answer by freddy
Submitted on 3/25/2004
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i want to no 2 thaTS why i came here dumb asses

Answer by agfa
Submitted on 3/28/2004
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i dont know

Answer by Dumb Ass
Submitted on 4/1/2004
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Um i dunno

Answer by Confused
Submitted on 4/4/2004
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isnt that why we all came here? to find out stuff bout cyclones?

Answer by beth
Submitted on 4/13/2004
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we all came here to find out to do sum gay ass or another assignment.sum 1 freaking tell us

Answer by sally
Submitted on 4/26/2004
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ppl... u idiots... the most intelligent thing u can put is that?? if that's the case why don't u go 2 another site instead of saying stupid stuff like that? by the way... what causes cyclones?

Answer by Farter
Submitted on 5/11/2004
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I think cyclone came out of my ass dude! it killed many people dude! its stinky and it once wiped out the whole entire city dude! so cyclone is formed by me!dude!

Answer by Liv
Submitted on 5/12/2004
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id apreciate not reading homophobic coments in these answers. this website sucks.

Answer by Smart ass (dumb ass's sis)
Submitted on 5/16/2004
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A cyclone is caused by tectonic and atmospheric conditions. Cyclones start as a low depression on the seas surface then build up and move inland, slowly breaking up. Thats why cyclones are found along the coast and not right inland. Cyclones are in categories just like hurricanes or typhoons. Cat. 1: strongest gust less then 125km/h Cat. 2: strongest gust 125 - 170 km/h Cat. 3: strongest gust 170 - 225 km/h Cat. 4: strongest gust 225 - 280 km/h Cat. 5: strongest gust more than 280 km/h

Answer by Lole
Submitted on 5/20/2004
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CYCLONE IS A VERY STRONG WIND THAT CAUSES DAMAGE TO THE TREES, ANIMALS AND ALSO HUMAN.

Answer by Lole's dumb
Submitted on 5/21/2004
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nah?!?!?!?!?!

Answer by lisa
Submitted on 5/31/2004
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you guys are so dumd

Answer by jess
Submitted on 6/1/2004
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i think you should be a little more respecful to others and what they say i mean no swearing like come guys on anyways cyclones are caused by warm + cold air mixing over water and then working its way to land

Answer by dumd (what idiot can't spill dumd)
Submitted on 9/16/2004
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a man walked into a bar - ouch! nah seriously, i love cyclones, actually, i'm in one right now. so i betta go. i luv all you guys!

Answer by sweet_chick_84
Submitted on 6/3/2004
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i can't believe i came to this site and there was one decent answer...... you all suck...... grow a brain and use it propaly....

Answer by David
Submitted on 6/10/2004
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Cyclones are just like hurricanes and typhoons, in every way, besides the ocean they form in. They form when a low pressure area encounters favorable conditions, including water temperatures of around 80 degrees F at least, weak upper-level winds (called shear) that do not destroy the thunderstorms, and a good environment for ventilation. In order for the cyclone to grow and expand, it needs to receive energy (from the warm water), use the energy, and then let it out. A cyclone can not form without the necessary requirements, and can not become powerful without everything being perfect for development.

Answer by Anth
Submitted on 8/4/2004
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i am stupid i stink i luv my poo i eat it every day and cyclones are farty

Answer by just-mark
Submitted on 8/5/2004
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hmmm this is gay fuking hell wat kind of website is this

Answer by buck
Submitted on 8/8/2004
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thanx david 4 that answer

Answer by dis_sucks_crap_
Submitted on 8/10/2004
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Sweet chick cant spell Properly whatt a dumb asssssssss!!!!

Answer by Daniele
Submitted on 8/30/2004
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Cyclones start their life over hot water, where the temperature of the warm water is 27 degrees Celcius. Hot air rises over warm water and expands, pushing against the air already there, then cold air takes its place.

Answer by ben dover
Submitted on 8/31/2004
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u r gay

Answer by cute chicks
Submitted on 8/31/2004
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Cyclones are caused by to many poeple running around in circles over and over again!!

Answer by WTF???
Submitted on 9/2/2004
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I dont get it...i came to this website coz i have a project due tomorrow and it helps me jack all, i cant believe im actually answering this...i read all the other answers by other people and there right... why do u think we came to this site? To see what other people dont know??? POINTLESS, BLOODY POINTLESS!!!!!!!!!!!

Answer by Assignemt Chick
Submitted on 9/28/2004
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A Cyclone occurs when the Hot air rises over the water which temperature is 27 degrees Celsius or above. When the hot air rises over the warm water it expands and begins to push against the air that is already there. A cyclone starts as a low-pressure system over the sea (which temperature is warm) and builds up (for a cyclone to build up it needs energy which it gets from warm water) and moves towards the inland cyclones are mainly found on the coast. The cyclone destroys other storms to build up energy.

Answer by SH!T F@C3
Submitted on 10/20/2004
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.........................................

Answer by jess
Submitted on 10/21/2004
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what causes an cyclone?

Answer by Penelope and Jonathon
Submitted on 11/7/2004
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as you can tell now i have very much indeed loved and admired reading this website. It has inspired me to learn more about the world and cyclones around us. I know now down deep in my heart that me and a cyclone just click together like a couple of lovers

Answer by Mc muffin
Submitted on 11/7/2004
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hello my fellow computeress you seem to be interested in the same topics so i just want to say this is the most interesting thing i have ever resherched and i know that i will always love you penny i love resherch

Answer by bob
Submitted on 11/8/2004
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i love emma clarcke

Answer by Very Annoyed
Submitted on 11/9/2004
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for gods sake just give the answers!!!!!! Man freaking hell i want the answer not what everyone else thinks!!!!!

Answer by Amy
Submitted on 11/11/2004
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This site is very gay. We wont to know the real answere not some goody goodies answere

Answer by Penelope
Submitted on 11/14/2004
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I think that it would be quite intellegent to do that. It is very interesting i hvent got round to reading everyones reports on this topic yet but i love the technique of the subject i love cyclones mwah ha ha

Answer by itsnotmyfaultusuck
Submitted on 11/14/2004
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use 4 all dumb, can u just tell me the answer please