What kind of pressure is at the center of a hurricane?
608235
That would be low pressure. The center, or eye, of a hurricane always has low pressure.
380970
Hurricanes are intense low pressure  areas that form over warm ocean waters in the summer and early fall. Their source of energy is water vapor  which is evaporated from the ocean surface. Water vapor is the "fuel" for the hurricanes because it releases the "latent heat of condensation" when it condenses to form clouds and rain, warming the surrounding air. (This heat energy was absorbed by the water vapor when it was evaporated from the warm ocean surface, cooling the ocean in the process.) Usually, the heat released in this way in tropical thunderstorms is carried away by wind shear, which blows the top off the thunderstorms. But when there is little wind shear, this heat can build up, causing low pressure to form. The low pressure causes wind to begin to spiral inward toward the center of the low. These winds help to evaporate even more water vapor from the ocean, spiraling inward toward the center, feeding more showers and thunderstorms, and warming the upper atmosphere still more. The showers and thunderstorms where all of this energy is released are usually organized into bands (sometimes called "rainbands" or "feeder bands"), as well as into an "eyewall" encircling the center of the storm. The eyewall is where the strongest winds occur, which encircle the warmest air, in the eye of the hurricane. This warmth in the eye is produced by sinking air, which sinks in response to rising air in the thunderstorms. The winds diminish rapidly moving from the eyewall to the inside of the relatively cloud-free eye, where calm winds can exist.\nhurricane eyes seen from the Space Shuttle and from aircraft\nHurricane intensity is based upon the highest sustained (1 minute average) wind speed the hurricane is producing. The "Saffir-Simpson" scale rates hurricane strength in this way from Category 1 to Category 5. These categories were chosen based upon the amount of damage that each category can produce.\nIntensity Wind Speed Damage\nCategory 1 74- 95 mph MINIMAL: tree branches, shrubs, unanchored mobile homes\nCategory 2 96-110 mph MODERATE: mobile homes, poorly constructed buildings, some trees down\nCategory 3 111-130 mph EXTENSIVE: small buildings damaged, large trees down, mobile homes destroyed\nCategory 4 131-155 mph EXTREME: outer walls damaged, roof failure on small buildings, extensive damage to doors and windows, mobile homes destroyed\nCategory 5 >155 mph CATASTROPHIC: complete roof failure on many buildings, some buildings destroyed, severe window and door damage, mobile homes destroyed\nIn low-lying areas, much of the damage from hurricanes can be from the "storm surge", in which water being blown onshore by the high winds rises rapidly. The storm surge can destroy the lower floors of some buildings, or even destroy the foundations of residences causing the homes to wash away. The storm surge can also trap residents from evacuating along low-lying escape routes.\n\nHurricanes almost always travel poleward at the end of their life cycle, helping to transport excess heat out of the tropics toward higher latitudes. They gradually die as they move over cooler waters, which do not have the heat energy necessary to evaporate sufficent water vapor into the atmosphere to fuel the hurricane. If the hurricane crosses over to land, the heat source is removed entirely. With the removal of the energy source, and the greater surface friction of the land's terrain and vegetation, the hurricane's winds rapidly decrease.
326877
Hurricanes are strong wind storms, which are cyclonic in nature. This means that they revolve around a central point, which is known as an ‘eye’. The eye is the calmest part in the storm, while the winds raging around the storm have reached a speed of 119 km an hour! The winds rotate in an anti-clockwise direction in the northern hemisphere, and in a clockwise direction in the southern hemisphere. \n\n\nHow are hurricanes formed? \n\nHurricanes are formed in tropical, ocean areas. The warm air above the ocean begins to rise, and as it rises, it condenses and forms clouds and rain droplets. The process of condensation always results in the release of heat. So when the heated air rises and releases heat during condensation, the surrounding air also becomes warm. This warm air rises further, and then gets blown away by the high altitude winds, and cold air is pushed down to the ocean. The cold air then becomes warm because of the warmth of the ocean, and rises up again and is blown away. In addition, converging winds over the ocean (winds that run into each other) also push the ocean air upwards. Since the ocean air is in any case rising when they are warmed, the converging winds make it rise even faster. Thus, due to these phenomena, the movement of air increasingly becomes more and more rapid. \n\n\nWhat are tornadoes? \n\nFar more violent than hurricanes are tornadoes. Winds surrounding tornadoes often reach speeds of 100 miles an hour, and have even reached speeds of 300 miles an hour. \n\n\nHow are tornadoes formed? \n\nTornadoes are usually formed from thunderstorms and can be defined as a violent column of air extending from the base of a thundercloud to the ground. To put it simply, thunderstorms that rage in the sky ‘drop’ what appears to be a rope, but is actually a gust of wind moving in a circular direction. When this ‘rope’ touches the ground, it wreaks havoc. \n\nTornadoes are formed in a similar manner as hurricanes. Warm, moist air rises up and condenses, releasing heat and forming a thundercloud and rain. (Tornadoes are thus often accompanied by rain, and can cause flooding.) This continuous rise of air upwards is called an ‘updraft’, and a low pressure area is created in the center. High pressure cold winds are then sucked inwards, and the colliding forces causes the thunderstorm to rage. \n\nThese clouds are often green in colour, and at times the sky too turns green – a phenomenon that scientists still don’t have an explanation for. Hurricanes and tornadoes are similar to the extent that they both have a cyclonic movement, which means that they rotate around an eye. A tornado’s movement, as we have seen, is far swifter and more centered. \n\n\nHow are tornadoes ranked? \n\nTornadoes are ranked on a six-tiered “Fujita Scale”. A rank of F0 means that the tornado is weak and has caused a minimal of damage, while a rank of F6 means that the tornado was severe and has caused many deaths and damage to property. The vortex of a tornado is a dangerous place to be because here is where there is maximum rain and hail.
761629
Hurricanes (Atlantic Ocean) and typhoons (Pacific Ocean) are both cyclonic large low pressure cells exceeding a certain sustained wind speed.  Storms are similar, but smaller and with less sustained winds.  Sailors use the Beaufort Scale to separate intensity of weather systems.
573937
Extratropical cyclones- storms that have frontal interactions, sometimes called midlatitude cyclones\nTropical cyclones- hurricanes, tropical storms; these have no frontal zones and are usually found in "source regions" during tropical season.\nCyclones and disturbances are not limited to the surface and can occur at any level in the atmosphere.
347538
To sum it up, a cyclone is cloud/storm system that spins, and a hurricane is a tropical storm in the Atlantic Ocean. Also, Cyclone is the name for Hurricane type storms that hit Australia. Confusing, I know.
341263
Wind and storm surge.
818535
Try the National Hurricane Center - http://www.nhc.noaa.gov/ - there's tons of good information on this site.
556432
Hurricanes are what scientists call "strong Tropical Cyclones". They are formed when large areas of the ocean become heated, and the air pressure over that area drops. This causes thunderstorms and strong surface winds. Cyclones develop over tropical or sub-tropical waters (for example, in the Atlantic off the coast of Africa, or in the Pacific). As they travel long distances gathering energy from the ocean, they are likely to be classified as strong Tropical Cyclones. When the winds of a tropical storm reach 74 mph, then the storm is classified as a hurricane.\n\nMore information on how hurricanes happen can be found on this good site : http://kids.earth.nasa.gov/archive/hurricane/creation.html
760551
Hurricanes, tornadoes, eathquakes, cyclones....stuff like that.
451499
cyclone: an atmospheric system characterized by the rapid inward circulation of air masses about a low-pressure center, usually accompanied by stormy, often destructive weather. Cyclones circulate counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. \n\nhurricane: a severe tropical cyclone originating in the equatorial regions of the Atlantic Ocean or Caribbean Sea or eastern regions of the Pacific Ocean, traveling north, northwest, or northeast from its point of origin, and usually involving heavy rains. \n\ntyphoon: a tropical cyclone occurring in the western Pacific or Indian oceans.
238622
it is the normal force per area...\nyou can visit this site:\nhttp://en.wikipedia.org/wiki/Pressure
834166
In meteorology, a cyclone is an area of low atmospheric pressure characterised by inward spiraling winds that spin clockwise in the northern hemisphere of the Earth, or counterclockwise in the southern hemisphere. It is a generic description covering a wide variety of different meteorological phenomena such as tropical cyclones, Extratropical cyclones and tornadoes, thus is rarely used by meteorologists without a qualifying term.\n\nThe terms hurricane and typhoon are regionally specific names for a strong tropical cyclone—a non-frontal, synoptic-scale, warm-core low-pressure system with cyclonic surface wind circulation (Holland 1993). Specifically, hurricanes generally refer to such storms in the Atlantic Basin and the Pacific Ocean east of the International Date Line. Typhoons refer to the storms in the north Pacific west of the International Date Line. The typhoon term has also been applied to tropical cyclones in the South Pacific or Indian Ocean, but this is not considered correct usage today\n\nare same
250403
They last until it hits land.\nThat's when it begins to slow down and lose its power.\n\nBut they do f-ck things up as hit makes landfall.\nRemember Katrina?
67084
By definition, a hurricane is fierce rotating storm with an intense centre of low pressure that only happens in the tropics. In south-east Asia they're known as typhoons and in the Indian Ocean, cyclones.\nThey cause high winds, huge waves, and heavy flooding. One of the most powerful of all weather systems, hurricanes are powered by the heat energy released by the condensation of water vapour. However, the conditions have to be exact for a hurricane to form, with the sea's surface temperature being above 26.5°C.\n\nStorm surge\nThis is caused by the intense low pressure at the eye of a hurricane, combining with the effect of strong winds. The sea rises 1cm for every millibar of pressure - if the pressure is 930 millibar, the sea surge will be about 80 cm. Hurricanes can raise the seas surface by as much as 4m.\n\nThe hurricane winds push the surge along in front of its path. When this surge hits low-lying coasts, the effects can be devastating. In addition to the sea surge, flooding can also result from torrential rain falling from the storm clouds.\n\nTsunamis\nA tsunami (pronounced tsoo-nah-mee) is a chain of fast moving waves caused by sudden trauma in the ocean. They can be generated by earthquakes, volcanic eruptions, or even the impact of meteorites. Tsunami are also incorrectly known as tidal waves, but unlike tidal waves they are not caused by changes in the tides.\n\nThey are most common around the edge of the Pacific, where more than half of the world's volcanoes are found. These seismic surges can assault coastlines, often with little or no warning. Rocks weighing as much as 20 metric tonnes have been plucked from sea walls and carried 180m inland. \n\nWave power\nTsunamis aren't like wind-generated waves that rhythmically roll onto a beach. A tsunami can have a wavelength (ie distance between wave crests) in excess of 100km (60 miles) and there may be an hour between them. They travel at great speeds across an ocean with hardly any energy losses and are barely noticeable out at sea.\n\nOver the deep Pacific Ocean, a tsunami travels at about 800kph (500mph). If an earthquake happened in Los Angeles, a tsunami could hit Tokyo quicker than you could fly between the cities by jet. The tsunami caused by the earthquake off the coast of Indonesia in late 2004 travelled 4,500km (2,800 miles) to Somalia in East Africa in just seven hours.\n\nAs a tsunami leaves the deep water of the open ocean and travels into the shallower water near the coast, it behaves like a normal wave - only with more muscle.\n\nShallow water slows the tsunami and its height grows. Tsunamis batter the coast with tremendous amounts of energy. They can strip sand from beaches, tearing up trees, and even obliterating whole towns. Some have been known to reach as much as 30m above sea level. \n\n\nThe only way they may be alike is that because of a Hurricane, you might have huge waves, but still, waves generated by Tsunami would be larger.
718853
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.
597906
In school, I used a CAD program to draw and design a rocket made from a soda bottle. In making this, we had to be aware of two important concepts: center of pressure and center of gravity. The center of pressure is the point at which all pressures are centered. This is basically the line at which there is an equal surface area of rocket above and below it.\nThe center of gravity is the line at which there is an equal amount of mass above and below it. For a rocket to fly properly, the center of mass needs to be situated the average diameter of the rocket above the center of pressure.