How are Typhoon(Cyclone, Hurricane, Tropical Depression) formed?
337060
They Form over hot water.
148092
Wikipedia has a good answer: http://en.wikipedia.org/wiki/Tropical_cyclone\n\nin addition:\n\nhttp://www.britannica.com/eb/article-67118\n\nFormation of tropical cyclones\n\nTropical cyclones represent still another example of sea-air interactions. These storm systems are known as hurricanes in the North Atlantic and eastern North Pacific and as typhoons in the western North Pacific. The winds of such systems revolve around a centre of low pressure in an anticlockwise direction in the Northern Hemisphere and in a clockwise direction in the Southern Hemisphere. The winds attain velocities in excess of 115 kilometres per hour, or 65 knots, in most cases. Tropical cyclones may last from a few hours to as long as two weeks, the average lifetime being six days.\n\nThe oceans provide the source of energy for tropical cyclones both by direct heat transfer from their surface (known as sensible heat) and by the evaporation of water. This water is subsequently condensed within a storm system, thereby releasing latent heat energy. When a tropical cyclone moves over land, this energy is severely depleted and the circulation of the winds is consequently weakened.\n\nSuch storms are truly phenomena of the tropical oceans. They originate in two distinct latitude zones, between 4° and 22° S and between 4° and 35° N. They are absent in the equatorial zone between 4° S and 4° N. Most tropical cyclones are spawned on the poleward side of the region known as the intertropical convergence zone (ITCZ).\n\nMore than two-thirds of observed tropical cyclones originate in the Northern Hemisphere, and roughly the same proportion occur in the Eastern Hemisphere. The North Pacific has more than one-third of all such storms, while the southeast Pacific and South Atlantic are normally devoid of them. Most northern hemispheric tropical cyclones occur between May and November, with peak periods in August and September. The majority of southern hemispheric cyclones occur between December and April, with peaks in January and February.\n\n\n---------------------------------------------\n\nTyphoon is a tropical cyclone located in the western north Pacific basin (between 100E and 180E in the northern hemisphere). The category of a typhoon is decided by the maximum sustained winds, but please note that the typhoon in Japanese standard and the typhoon in international standard is not the same. Finally, among tropical cyclones in the world, the typhoon is the most frequent and the strongest tropical cyclone (http://agora.ex.nii.ac.jp/digital-typhoon/help/world.html.en)\n------------------------------------------------------\n\nhttp://www.taiwanho.com/modules.php?op=modload&name=News&file=article&sid=205\n\nTyphoons (called hurricanes in the Atlantic and East Pacific, and cyclones in the Indian Ocean and around Australia) are the worlds most violent and destructive storm systems. Around 17 typhoons form annually in the West Pacific, of which around one third make landfall. They are giant whirlwinds, with air circulating around an area of low pressure, and high winds extending about 100km from the centre.\n\nMost typhoons form between 5-30 degrees latitude, and 110-180 degrees longitude. Typhoons that form in the east of this region can travel for long distances without being affected by landmasses. This gives them plenty of time to build up their strength. Hence, the very strong and long lasting supertyphoons tend to form closer to the date line. Sea surface temperatures in the Nino 4 region (5S-5N, 160E-150W) affect the longitude at which typhoons tend to form. Warm sea surface temperatures in this region result in more typhoons forming closer to the date line.\n\nSome prerequisites for typhoon formation are listed below:\n\n1. Sea surface temperatures greater than 26C to a depth of 60m. This provides the moisture for the thunderstorm activity in the storm.\n\n2. A large enough drop in temperature with height so that the atmosphere is conditionally unstable to
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Hurricanes are in the Atlantic ocean and Northeast Pacific Ocean east of the dateline, Typhoons in the pacific, cyclones in the Indian ocean. \n\nIn general they are the same thing. Hurricanes spin counter clockwise. There are minor differences in how the strength and wind speed of these storms are catagorized. For example wind speed in hurricanes is 10 minute sustained winds while typhoons it is only 1 minute. So Typhoons may appear to have stronger wind speeds than their Atlantic relitives. There are minor differences in the wind speed catagories of hurricanes and Typhoons. Both get different sets of names as well. For all functional purposes it is only a regional name for the same kind of storm. \n\nI could swear I read somewhere that Typhoons and or cyclones south of the equator spun clockwise but cannot verify this.
424923
As there is a monsoon every year, and multiple typhoons every year, I am having trouble understanding what you want to know.  The biggest problem from monsoons is MOLD. Nasty mold. The monsoon season is in the beginning of summer, so it`s hot and wet. Other than having to be careful about mold, and to carry an umbrella everywhere - there are no special problems.\nAs for typhoons - things blow away, fishing boats get trashed, etc. The biggest problems I have personally seen have been rivers overflowing their banks due to a huge rush of water.\n\nJapan has dealt with these things forever. It`s a yearly event, so all the precautions are in place. It`s expected, so there really aren`t *that* many special problems.
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They are called extra-tropical systems. An extra-tropical system would not normally have hurricane characteristics, such as an eye, therefore would not be called a hurricane...unless it developed into a warm core system. Easy, huh?
784427
Cyclones,hurricanes and typhoons are caused by warm tropical moister bearing clouds developing in open oceans or seas,as the atmosphere becomes favorable for development,(no wind sharing in the higher parts of the atmosphere)normal thunder storm or clump together,as the system gets larger the the pressure fall within it,what causes a system to go anti clock wise is the earth spinning on its axis(in the southern hemisphere cyclones and etc, spins in reverse when compared to the northern hemisphere).\n\nWith the help of trade winds which stares these immense giant weather systems across areas of the planet,also. but the main thing to is that they all start out as small disturbances,or low pressure areas that come into favorable areas for development. \n\nThe same is also almost true for northers or nor_Easters along the east coast of the US in winter months.\n\nOr if you are talking about tornadoes,well that the process of cold air from the north clashing with warm air from the Gulf of Mexico,as both air bodies moves along side each other a funnel shape spiral is form,this normally occur es at best in super cell charged thunder cell,due to day time heating or the leading edge of a cold front,the jet stream in this case does the staring of All weather phenomenons across the USA,and the direction at which the spiral goes is anti clock wise,caused by the earth spinning on its axis.hope this helps.
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They are usually referred to as cyclones or tropical cyclones. A less official term also used is willy-willy.
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There's no discernable relationship with the occurence of Katrina - hurricane formation is far more complex than just temperature, and depends much more on local weather conditions.  Hurricanes are powered by warm water, so warming conditions will tend to make storms stronger however, which some see as part of the reason we've had so many strong storms this past year.
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You should find all the info you need here:\nhttp://en.wikipedia.org/wiki/Hurricane#Structure_and_classification
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That's a real tough question to answer.\n\nHurricanes don't just result from warm water. If they did we would expect to see more hurricanes in tropical regions than we do. It's fairly complex, but to form hurricanes basically need warm water under a stable, cold, upper level air mass to produce the low pressure bubble. Cyclones and hurricanes only form in a few regions around the world called 'cyclone basins' because only a few regions have those exact conditions. Because the conditions for hurricane formation are so specific it's really hard to predict the effects of climate change.\n\nWarmer oceans should increase the frequency and intensity of hurricanes. Howevere the atmosphere and oceans probably don't warm at the same rate. The atmopshere ATM seems to be warming much faster than the oceans. That might mean that the cold summer air masses needed for hurricane formation will become much rarer, and as a result hurricanes may become far less freqeunt. \n\nAlternatively the cyclone basins may just move. With moderately warmer oceans and a much warmer atmopshere the basins might well move to higher latitudes to where the air is colder. That would be far more catastrophic than a simple increase in frequency. Places that are historically hurricane prone have learned to build to cope with them. If the basins move hurricanes will start stiking places that are not deisgned to withstand them. Can you imagine the effect of a hurricane on New York City or London?\n\nThen we get to throw in other complicating factors like the changes in ocean currents and atmopspheric systems brought about by warming. Weather is the ultimate choatic system, there are a huge number of interscting variables. That makes it just about imposisble to predict 3 months in advance under stable conditions. Trying to predict what will happen 30 years down the track under changing condition is laughable.\n\nAt the moment there is just to much we don't know about how hurricanes form and what the effects of global warming will be. The majority opinion is we'll see more hurricanes and more intense hurricanes, but there is a large minority plumping for movement inthe cyclone basins and a small minoirty predicting decreased frequency.\n_________________\n\n>>>>watch the movie "The day after tomorrow". good movie,\n>>>> and accurate prediction of what could happen if global \n>>>> warming continues.\n\nPMSL. \n\nYeah, and after that watch "Godzilla" for an accurate prediction of what happens following an atomic test.
760551
Hurricanes, tornadoes, eathquakes, cyclones....stuff like that.
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over the ocean it is hard to find out how many waterspouts (the correct term of tornadoes over water) form.  Tornadoes in the US turn out to be about 300, hurricanes/ tropical storms worldwide is about 100,  thunderstorms happen each day all over the world so it is hard to keep count.  Even us meteorologist have a hard time trying to predict hot spots for hurricane formation, it was a shock that Hurricane ivan came 8o lat, from the equator, becuase they need what is called the corriolis force to exist, near the equator the force is =0 so even we have a hard time keeping count, as well as predicting them.
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A hurricane begins when a warm, wet mass of air over the sea begins to rise quickly. Then combined actions of air, water and heat may then produce a huge, spinning system of clouds, rain and wind- a hurricane. The center, or eye, of a hurricane is calm. It is a hole in a dough-nut of wind. \nA hurricane usually lasts 9-12 days. It forms and builds strength over warm sea water. It loses energy as it moves over cooler sea water or land.
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The storms comparable to hurricanes that originate in the Pacific ocean are called typhoons.  \n\nI am sorry to say that it looks like Japan might have another very severe typhoon season this year.  In one very recent year they had far more than normal.\n\nOn rare occasions hurricanes can cross from the Carribean into the Pacific and regain strength becoming typhoons and vice versa.\n\nI believe they are called typhoons also when they hit China and the Philippines.\n\nFor Australia and India they are called cyclones, and that is also the generic name for all three.\n\nTyphoons can be the most spectacularly strong of all cyclones, and certainly hold the record for size.  Not difficult to understand when you consider the size of the Pacific Ocean and the fact that it is subject to heating as are the Atlantic and the Carribean, Gulf of Mexico.\n\nYou can monitor the potential for these by using the AVISO urls (sea level anomalies) found at my weather blog:\n\nhttp://360.yahoo.com/ki_te_moana\n\nThere is comprehensive weather info there if you take the time to delve into the blog and the Blog Roll.
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Actually, cyclones ARE another name for hurricanes - I post this directly, not changing the context one bit.\n\nIn meteorology, a cyclone is the rotation of a volume of air about an area of low atmospheric pressure. Cyclones are responsible for a wide variety of different meteorological phenomena such as tropical cyclones and tornadoes. Because of this, most weather forecasters avoid using the term cyclone without a qualifying term.\n\nTropical cyclones (also known as tropical storms, hurricanes and typhoons) are cyclones which form over warm (generally tropical) ocean waters and draw their energy from evaporation and condensation. They are characterized by a strong area of low pressure at the surface and an area of higher pressure aloft. Tropical cyclones are associated with strong thunderstorms, high winds, and flooding.\n\nIn North America, tornadoes are sometimes described as cyclones because they involve powerful winds around a low-pressure vortex. However, they differ from other cyclones by their very local nature; most cyclones are massive storms, while tornados are comparatively small but extremely powerful. Tornadoes occur on too local a scale for the Coriolis effect to determine the direction of rotation; for this reason tornado winds sometimes flow anticyclonically, or opposite the direction dictated by the Coriolis effect.
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As much as I hate to contradict others, the East and West explanation is inaccurate. Hurricanes are in the Northern Hemisphere, while cyclones and typhoons are in the Southern Hemisphere. Another difference, which is caused by their location, is the direction in which they spin. The rotation of  the Earth causes hurricanes to spin counterclockwise, while cyclones go clockwise.
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A front is a bank of cloud that seperates warm air and cold air. A cyclone is the name given to hurricanes in the Indian and Oceanian Oceans.