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Topic: Tropical cyclone

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	Glossary of NHC Terms
		In comparison to tropical cyclones, such systems have a relatively broad zone of maximum winds that is located farther from the center, and typically have a less symmetric wind field and distribution of convection.
		A tropical cyclone in which the maximum sustained surface wind speed (using the U.S. 1-minute average) is 33 kt (38 mph or 62 km/hr) or less.
		A tropical cyclone in which the maximum sustained surface wind speed (using the U.S. 1-minute average) ranges from 34 kt (39 mph or 63 km/hr) to 63 kt (73 mph or 118 km/hr).
	www.nhc.noaa.gov /aboutgloss.shtml (2067 words)

	What is a tropical cyclone?
		Tropical cyclones with a maximum wind speed of less than 60 km/h are called tropical depressions; when the maximum wind speed ranges between 60 and 110 km/h, they are tropical storms, and when the maximum wind speed exceeds 110 km/h, they are called tropical cyclones.
		The centre, or eye, of a tropical cyclone is relatively calm and warm.
		Although tropical cyclones occur in definite regions of the world (see figure 3 - 713 sec to download) and generally moves in a westerly direction, their precise tracks are erratic and very difficult to predict.
	www.weathersa.co.za /References/Cyclones.jsp (854 words)

	weather.com - Glossary
		A tropical cyclone in which the maximum sustained surface winds are 38 miles per hour (33 knots) or less.
		A tropical cyclone in which the maximum sustained surface winds are from 39 miles per hour (34 knots) to 73 miles per hour (63 knots).
		This same tropical cyclone is known as a hurricane in the eastern North Pacific and North Atlantic Ocean, and as a cyclone in the Indian Ocean.
	www.weather.com /glossary/t.html (2034 words)

	1991 Bangladesh cyclone - Wikipedia, the free encyclopedia
		On the night of 29 April 1991 a powerful tropical cyclone struck the Chittagong district of southeastern Bangladesh with winds of around 155 mph.
		The tropical storm continued slowly northwestward, slowly strengthening to a cyclone-strength storm on the 27th.
		The cyclone uprooted a 100-ton crane from the Port of Chittagong, and smashed it on the Karnaphuli River Bridge, effectively breaking it into two sections.
	en.wikipedia.org /wiki/1991_Bangladesh_cyclone (578 words)

	Tropical cyclone - Wikipedia, the free encyclopedia
		Warm core: Tropical cyclones are characterized and driven by the release of large amounts of latent heat of condensation as moist air is carried upwards and its water vapor condenses.
		Tropical cyclones that cause massive destruction are fortunately rare, but when they happen, they can cause damage in the range of billions of dollars and disrupt or end thousands of lives.
		A tropical cyclone need not be particularly strong to cause memorable damage; Tropical Storm Thelma, in November 1991 killed thousands in the Philippines even though it never became a typhoon; the damage from Thelma was mostly due to flooding, not winds or storm surge.
	en.wikipedia.org /wiki/Tropical_cyclone (10043 words)

	Tropical cyclone - Simple English Wikipedia
		A tropical cyclone is a low pressure system and a cyclonic storm found in the tropics on Earth.
		Tropical cyclones usually move towards the west in the tropics.
		Tropical cyclones are usually given names, because this helps in forecasting, tracking, and reporting.
	simple.wikipedia.org /wiki/Tropical_cyclone (929 words)

	Tropical cyclone - Biocrawler (Site not responding. Last check: )
		The primary energy source of a tropical cyclone is the release of the heat of condensation from water vapor condensing at high altitudes.
		Tropical cyclones far from land are tracked by weather satellites using visible light and infrared bands.
		Tropical cyclones that cause massive destruction are fortunately rare, but when they happen, they can cause damage in the thousands of lives and the billions of dollars.
	www.biocrawler.com /encyclopedia/Typhoon (5070 words)

	Historical Tropical Cyclone Tracks
		The term "tropical cyclone" is a generic term for a low-pressure storm system that usually forms in the tropics.
		Tropical storms are classified by wind speed and by the structure of the storm and include hurricanes, other tropical cyclones, subtropical cyclones, and related storms.
		A subtropical cyclone, such as a subtropical depression or storm, is a low pressure system that develops over subtropical waters and that initially has a non-tropical circulation but in which some elements of tropical cyclone cloud structure are present.
	www.nationalatlas.gov /mld/huralll.html (713 words)

	Tropical Cyclone Summary - March 1998
		Tropical Cyclone Elsie (TC-27S) 12-17 March --------------------------------------------- JTWC issued the first warning on a rapidly developing tropical system in the central Indian Ocean at 0000 UTC on 12 Mar. The system was located about 850 nm southeast of Diego Garcia.
		Tropical Cyclone Fiona (TC-28S) 17-20 March --------------------------------------------- JTWC issued the first warning on Tropical Cyclone 28-S (to be named Fiona by the Mauritius TCWC) at 0000 UTC on 17 Mar. The center of this rapidly developing cyclone was located about 150 nm northwest of Rodrigues.
		Tropical Cyclone Yali (TC-29P) 18-27 March ------------------------------------------- A well-defined low pressure system was identified in the Southwest Pacific on 18 Mar and drifted to the west between Vanuatu and the Solomon Islands while slowly strengthening.
	www.australiasevereweather.com /cyclones/1998/summ9803.htm (2387 words)

	HURRICANE ALLEY Tropical Cyclone Glossary
		The term implies both poleward displacement of the cyclone and the conversion of the cyclone's primary energy source from the release of latent heat of condensation to baroclinic (the temperature contrast between warm and cold air masses) processes.
		A tropical cyclone in which the maximum sustained surface wind speed (using the U.S. 1-minute average) is 33 kt (38 mph or 62 kph) or less.
		A tropical cyclone in which the maximum sustained surface wind speed (using the U.S. 1-minute average) ranges from 34 kt (39 mph or 63 kph) to 63 kt (73 mph or 118 kph).
	www.hurricanealley.net /info4.htm (1550 words)

	Historical Hurricane Tracks Tropical Cyclone Definition (Site not responding. Last check: )
		"Tropical Cyclone" is a generic term for a low pressure system that usually forms in the tropics.
		The cyclone is accompanied by powerful thunderstorms, and in the Northern Hemisphere, a counterclockwise circulation of winds near the Earth's surface.
		Tropical cyclones are also called hurricanes, tropical storms, and tropical depressions, depending upon intensity.
	maps.csc.noaa.gov /hurricanes/tropical.htm (52 words)

	Tropical Cyclone Product Help
		Tropical Cyclone Discussions are issued on all Central Pacific tropical cyclones, and all Atlantic and eastern Pacific tropical and subtropical cyclones every six hours.
		Tropical Cyclone Updates are brief statements issued in lieu of or preceding special advisories to inform of significant changes in a tropical cyclone or to post or cancel watches or warnings.
		Tropical Cyclone Position Estimates are issued between 2-hourly intermdiate advisories whenever a tropical cyclone with a well-defined radar center is within 200 nautical miles of land-based radar in the United States.
	www.prh.noaa.gov /cphc/pages/abouttcprod.php (1053 words)

	Tropical Cyclone Climatology
		In the figures, curves represent the average cumulative production of all named tropical systems, all hurricanes, and those hurricanes which were Category 3 or stronger in those basins.
		The basic idea is that a population of tropical cyclones falling within the 65 nm (75 miles) circle is obtained from the best-track file.
		Since there are only a few intense tropical cyclones typically in the 100-year record for a particular site, the mathematical function helps to smooth this out and "fill in the holes" so to speak.
	www.nhc.noaa.gov /pastprofile.shtml (698 words)

	USATODAY.com (Site not responding. Last check: )
		The term "tropical cyclone" is also used in the Indian Ocean and around the Coral Sea off northeastern Australia to describe storms called "hurricanes" and "typhoons" in other areas.
		Tropical wave: A kink or bend in the normally straight flow of surface air in the tropics which forms a low pressure trough, or pressure boundary, and showers and thunderstorms.
		Tropical storm warning: A warning for tropical storm conditions including sustained winds within the range of 34 to 63 kt (39 to 73 mph or 63 to 118 kph) that are expected in a specified coastal area within 24 hours or less.
	www.usatoday.com /weather/whur16.htm (842 words)

	NWS Houston/Galveston \| Tropical Weather \| Tropical Cyclone FAQ
		A tropical disturbance is a discrete system of organized showers and thunderstorms that originates in the tropics and maintains its identity for 24 hours or more.
		A tropical depression is an organized system of clouds and thunderstorms with a defined counter-clockwise circulation with maximum sustained winds of 38 mph (33 knots) or less.
		A tropical storm is an organized system of strong thunderstorms with a defined circulation and maximum sustained winds of 39 to 73 mph (34-63 knots).
	www.srh.noaa.gov /hgx/tropical/geninfo.htm (838 words)

	Tropical Weather Information
		A tropical cyclone in which the maximum sustained wind speed is 38 mph or less (less than 33 kt or 17 m/s).
		A tropical cyclone in which the maximum sustained wind speed ranges from 39 mph (34 kt or 18 m/s) to 73 mph (63 kt or 33 m/s).
		When winds in a tropical cyclone equal or exceed 74 mph (64 kt or 34 m/s) it is called a hurricane.
	www.crownweather.com /tropical.html (913 words)

	Tropical Cyclone Program
		The CPHC, under the Director, Pacific Region, is responsible for tropical and subtropical cyclone warnings and forecasts for the Pacific Ocean north of the equator from 140 to 180 west longitude.
		When a tropical cyclone passes from the Atlantic Basin to the Pacific Basin or visa versa, it shall be renamed (or be given a new number if a depression) and a new advisory numbering sequence shall begin.
		An abnormal rise in sea level accompanying a tropical cyclone or other intense storm and whose height is the difference between the observed level of the sea surface and the level that would have occurred in the absence of the storm.
	www.nws.noaa.gov /wsom/manual/archives/NC419903.HTML (10593 words)

	Oceanweather Inc: Research: Tropical Cyclone Modeling
		Those methods have been refined and upgraded over the years and applied to all parts of the globe affected by tropical cyclones in hindcast studies to develop definitive extreme ocean response (waves, surge, currents) criteria for design of offshore and coastal structures.
		The cyclone models include a primitive equation numerical atmospheric boundary layer model specifically formulated for translating tropical cyclones (Thompson and Cardone 1996), proven first, second and third generation spectral wave hindcast models (Cardone et al., 1996) and a 2-D hydrodynamic model (e.g.
		The success of the models results from their general formulation, which unlike empirical or parametric methods, makes them applicable worldwide since the basic structure of tropical cyclones are governed by a general set of thermodynamic and dynamic constraints.
	www.oceanweather.com /research/TropicalCyclone.html (556 words)

	Met Office: Tropical cyclones
		In recent years, the Met Office has increased its effort in the areas of tropical cyclone forecast improvement and verification, dissemination and international profile of products.
		Tropical cyclones are amongst the most powerful and destructive meteorological systems on earth.
		Tropical cyclone forecast guidance is produced by the Met Office and used by various other met.
	www.metoffice.gov.uk /weather/tropicalcyclone/index.html (220 words)

	Track and Positions of Tropical Cyclones
		There is currently no tropical cyclone located within the area bounded by 7-36N and 100-140E.
		(2) Tropical cyclone warnings for shipping will be issued by the Observatory for tropical cyclones located within the area bounded by 10-30N and 105-125E.
		The forecast tracks for these tropical cyclones will be updated at 3-hourly intervals.
	www.weather.gov.hk /wxinfo/currwx/tc_pos.htm (100 words)

	Hurricanes & Tropical Cyclone Life Cycles (Site not responding. Last check: )
		Several important ingredients are needed for a tropical disturbance to become a tropical cyclone and later strengthen into a tropical storm or hurricane:
		Tropical cyclones strengthen when all of the conditions are right for them.
		Tropical cyclones can survive in tropical areas with warm seas, but when they move out over cooler waters such as the yellow and green areas of the Atlantic Ocean or along the west coast of North America, they quickly start to lose their power.
	meted.ucar.edu /hurrican/strike/text/htc_t3.htm (989 words)

	Fred's Tropical Cyclone Page
		The most active and frequent tropical cyclones are the typhoons which occasionally can develop even during the northern hemisphere winter months.
		Whenever a tropical cyclone develops somewhere in the Atlantic Basin, I'll give you a direct link to the latest advisory on that system as I already did with tropical cyclones between 1997 and 2005.
		The sea surface temperatures in the tropics and subtropics however are at their warmest during this month over the tropical Northeastern Pacific waters and the chances of tropical cyclone development therefore will be at their highest of the year.
	www.cura.net /~fcapello/html/hurricane.htm (3022 words)

	Tropical Cyclone Advisory Mailing Lists
		NHC's tropical cyclone text products are available by email.
		Tropical Cyclone Position Estimate (Infrequent...sent in Update list)
		Each list will send an advisory for each pertinent active storm, so the number of emails increases substantially with the number of tropical cyclones the NHC is currently tracking.
	www.nhc.noaa.gov /signup.shtml (729 words)

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