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	Low pressure area - Wikipedia, the free encyclopedia
		A low pressure area, or a low for short, is a region where the atmospheric pressure is lowest with relation to the surrounding area.
		Frontal lows are temperate zone phenomena, and develop along the polar front as a result of the interaction between cold and warm surface air masses.
		Surface low pressure systems will tend to be smaller in area and have stronger surface winds than a given high pressure system, due to the addition of surface friction to the pressure gradient force, centrifugal force and coriolis effect that drive the circulation.
	en.wikipedia.org /wiki/Low_pressure_area (467 words)

	USATODAY.com (Site not responding. Last check: 2007-10-21)
		The centers of all storms are areas of low air pressure.
		If the low pressure area is the center of a Northern Hemisphere extratropical storm, a steady rain or snow can fall to the north of the warm front as warm moist air from the south rises up and over the cold air ahead of the warm front.
		Due to the counterclockwise circulation around low pressure areas in the Northern Hemisphere, cold air will likely be found to the north and west of low pressure areas while warm air is most often found to the south and east of low pressure areas.
	www.usatoday.com /weather/tg/wlowpres/wlowpres.htm (235 words)

	High and Low Pressure Systems
		Low pressure systems that travel across the Northern Hemisphere (better known as mid-latitude cyclones and more loosely known as lows, cyclones or storm systems) typically develop, intensify and dissipate over periods of 3 to 4 days.
		High pressure systems, on the other hand, tend to be of two types: either the semi-permanent systems that occupy the central portions of the Pacific and Atlantic Oceans, or the large systems that represent the large domes of cold (cool) air that invade southern latitudes following the passage of lows.
		If a low pressure area were to move eastward along the Texas and Oklahoma border, winds over Oklahoma would be light east to northeast, would become stronger northeasterly, gradually shift to the north before becoming strong northwesterly.
	okfirst.ocs.ou.edu /train/meteorology/HiLowSystems.html (663 words)

	Divergence and Formation of Surface Pressure Systems
		We can trace the development of the continental low pressure areas in the summer and the development of the tropical cyclones initially to divergence aloft which is the ultimate result of heating of the air columns over the warmer surface (land or ocean).
		The surface low pressure area linked to the main heating pattern of the globe (warmer equatorial region) is called the Equatorial Low.
		The high pressure area found on average at either pole linked to the average chilling patterns of the globe is known as the Polar High.
	tornado.sfsu.edu /geosciences/classes/m302/Divergence.html (1427 words)

	National Weather Service Fort Worth Glossary (Site not responding. Last check: 2007-10-21)
		Cutoff lows may remain nearly stationary for days, or on occasion may move westward opposite to the prevailing flow aloft (i.e., retrogression).
		However, not all closed lows are completely removed from the influence of the basic westerlies.
		Therefore, the recommended usage of the terms is to reserve the use of "cutoff low" only to those closed lows which clearly are detached completely from the westerlies.
	www.srh.noaa.gov /fwd/glossary/def/cutofflow.htm (100 words)

	Pressure Systems
		As mentioned earlier in the course, air flows from high pressure areas to low pressure areas.
		Low pressure areas are known to produce the bad weather.
		A Low Pressure system normally moves at about 20 MPH from South West to North East across the United Kingdom.
	www.avsim.com /geoffschool/pressure_systems.htm (723 words)

	Horizontal Pressure Variation - Meteorology Self Instructions - [Meteorological Service of Canada - The Green Lane]
		When a bulge occurs in the side of a LOW pressure area, it indicates the presence of a valley of low pressure which is known as a TROUGH.
		Similarly, when isobars are closely spaced or the pressure gradient is steep, a pressure change of 4 millibars occurs in a relatively short distance and when isobars are widely spaced or the pressure gradient is flat a pressure change of 4 millibars occurs in a relatively long distance.
		Diurnal pressure fluctuations are due to a rhythmic expansion and contraction of the atmosphere caused by alternate daytime heating and nighttime cooling.
	www.msc-smc.ec.gc.ca /education/msi/m3/3B032_e.cfm (3688 words)

	Chicagoland Mopar Connection Forums - Got a cooling problem at highway speeds?
		Normally the area behind the radiator core is at a lower pressure than the area in front of the radiator.
		The area from the bottom of the bumper down to the ground is where this big column of air blows by at highway speeds.
		The manufacturers rule of thumb was usually 1/2 again as much exit area as entrance area, and that area was usually located down and out on ether side of the engine along the firewall so it would carry the exhaust heat out also.
	www.chicagolandmopar.com /forums/topic.asp?TOPIC_ID=924 (1308 words)

	Air Pressure (Site not responding. Last check: 2007-10-21)
		The change in pressure measured across a given distance is called a "pressure gradient".
		The pressure gradient results in a net force that is directed from high to low pressure.
		A large difference in pressure combined with pressure areas that are close to each other will cause a huge pressure gradient which produces a strong wind.
	www1.fccj.cc.fl.us /pacrews/wind.htm (1450 words)

	low pressure \| Directory of Givmi (Site not responding. Last check: 2007-10-21)
		How low pressure systems affect weather By Chad Palmer, USATODAY.com When forecasters say a low pressure area or storm is moving toward your region, this usually means cloudy weather and precipitation...
		LOW PRESSURE SYSTEM An area of a relative pressure minimum that has converging winds and rotates in the same direction as the earth.
		Ideal for boosting low water pressure in homes where the incoming municipal water supply pressure is inadequate Increase water pressure from underground or surface water supplies Automatic water...
	www.givmi.com /s-low+pressure.html (235 words)

	The Telegraph - Calcutta : Nation (Site not responding. Last check: 2007-10-21)
		During an active period, depressions or low pressure areas form in the Bay of Bengal and move westwards over the Indian landmass, attracting moisture-bearing winds from the Arabian Sea and bringing rain.
		The unprecedented heavy rain over Mumbai last week was due to the combined effect of an earlier low pressure area over Madhya Pradesh and a vortex, a whirling system of winds and moisture in the northern suburbs of the city.
		The IMD said it has also spotted a fresh low pressure zone forming in the Bay of Bengal, but it is still too early to say whether it will have any impact on Mumbai.
	www.telegraphindia.com /1050802/asp/nation/story_5064011.asp (422 words)

	AccuHelp - The AccuWeather FAQ and Help Site (Site not responding. Last check: 2007-10-21)
		In order for the pressure to stay high, more air must be drawn into the high pressure area at somehigher altitude.
		Low pressure areas tend to form along the boundaries separating air masses with different temperatures.
		In a strengthening low pressure area, air is being removed at the top of the storm faster than it is drawn in at the bottom.
	www.accuweather.com /iwxpage/adc/help/pr_weathermap.htm (901 words)

	IFO - Aerodynamics
		The highest pressure is near the earth's surface and the lowest pressures is near space.
		In both cases there is a great pressure difference and the explosion/implosion motion goes from the relative high pressure area towards the relative low pressure area.
		The surrounding air is than pushing the airstream towards the low air pressure area at such a speed that the airstream forms a circle.
	www.laesieworks.com /ifo/how/Aerodynamic.html (3021 words)

	Little Flyers aircraft maintenance - engine cooling
		The high pressure air is typically produced at the front of the engine (on an aircraft of standard design) by the propeller forcing air in the cowling air inlets.
		One type is when air from high pressure area is forced down between the cylinders to a low pressure area; this type is called "downdraft".
		The low pressure area is due to gaps (intentional) at the bottom of cowling.
	www.littleflyers.com /engcool.htm (464 words)

	Mr. Burns' Science Page: Low Pressure Systems (Site not responding. Last check: 2007-10-21)
		Low pressure systems are important in understanding our weather in the Poconos.
		When the variation in pressure is lower than the surrounding areas, we have a low pressure system.
		Because of this difference in pressure, winds begin to move from the higher pressure areas to the lower.
	home.epix.net /~tgburns/lowpres.html (558 words)

	Gold mining definitions provided by HMMC. (Site not responding. Last check: 2007-10-21)
		HIGH PRESSURE AREA: A "high pressure area" is a general term referring to a place where water is moving fast, in comparison to the main flow of water.
		"Low and back pressure areas" are often found together and formed in the same manner; because of some major change off to one side of the waterway, change in the bedrock floor, or where the waterway changes direction.
		LOW PRESSURE AREA: A "low pressure area" is a general term, referring to a place where water slows down or even stops, in comparison to the main flow of water.
	www.goldminershq.com /FRAME/FORMS/DEF2.HTM (3078 words)

	Low - Wikipedia, the free encyclopedia
		Look up low in Wiktionary, the free dictionary.
		Low (complexity), a relationship between complexity classes in computational complexity theory
		Low pressure area, a region where the atmospheric pressure is lowest with relation to the surrounding area
	en.wikipedia.org /wiki/Low (129 words)

	Weather One - Let the Winds Blow
		If a high and low pressure area are close to each other a strong wind will develop, because a natural circulation of air will occur (see diagram below.) The greater the difference in pressure is, the stronger the wind.
		As large areas of land heat up during the summer (like on the Asian continent), a large area of low pressure will be formed.
		Winds at ground level are produced from low and high-pressure areas at or near the ground.
	www.urbanext.uiuc.edu /weather/4.html (558 words)

	7b. Hurricanes - Background Activities
		This low pressure area acts and is acted upon the same way the major areas respond: air from the surrounding area flows toward that point.
		Air flows toward the rising column at the center of the low pressure area from both the north and the south.
		As the air rushes toward the center of the low area, it is heated by the warm water (and the sun), and rises.
	www.usm.maine.edu /maps/lessons/nr07b.htm (1126 words)

	Low pressure - Low Pressure (Site not responding. Last check: 2007-10-21)
		But unusually low oil pressure in an engine, regardless of mileage, is often an indication Adding oil may temporarily remedy the low pressure condition,
		A low pressure center is where the pressure has been measured to be the A low pressure center is indicated on a weather map by a red "L" and winds flow
		Low Pressure Sodium light has a number of very unique properties arising from this A final advantage is that being a low pressure discharge lamp,
	etoplink.com /et/low-pressure.html (219 words)

	How a low-pressure system affects weather (Site not responding. Last check: 2007-10-21)
		Often, you hear weather forecasters refer to a storm or low-pressure area moving toward your region.
		Usually, when forecasters say a low-pressure area is moving toward your region, cloudy weather and precipitation often result as the low-pressure area approaches.
		Due to the counterclockwise circulation around low-pressure areas in the northern hemisphere, cold air will likely be found to the north and west of low-pressure areas while warm air is most often found to the south and east of low-pressure areas.
	www.usatoday.com /weather/wlowpres.htm (188 words)

	Location of corrosion coupon - Corrosionsource Discussion Boards
		I feel it shall be low pressure area where corrosion coupon be installed.
		Hi, I believe that the corrosion coupon should be installed at the high pressure side of the line since this will give the maximum corrosion rate possible in the line.
		If it is a closed system the pressure should not be that much of an issue but the flow is, you do not want the water around the cupon to become stagnent because this will alter your corrosion rates.
	www.corrosionsource.com /discuss2/ubb/Forum6/HTML/000109.html (460 words)

	Physics 137, Assignment 9 key
		Because the low is to the left when you face in the direction the wind is blowing the low pressure will be in the southeast and the high pressure will be in the northwest.
		However, as the winds continue around the low friction slows the winds so the Coriolis force is slightly smaller than the pressure gradient force resulting in a centripetal force which curves the wind around the low pressure area in a counter-clockwise direction.
		Between points 3 and 4 the pressure gradient is PG = (1012 mb - 1000 mb)/(1057 km) = 11.4 mb/1000 km = 0.0114 mb/km.
	maxwell.byu.edu /~spencerr/phys137/Assignment9key.html (939 words)

	[No title]
		A low pressure area (rising counter clockwise circulating air) will move into far western Minnesota late this afternoon.
		A widespread area of 1" to 2" of snow is possible across most of western Minnesota (Moorhead, Fergus Falls, Alexandria, Morris areas) this evening and then eastern Minnesota (St.Cloud, Twin Cities Metro, Mankato areas) during the overnight hours.
		Low temperatures will be near 20 degrees at sunrise Thursday with East-southeast winds at 4 - 8 mph.
	www.kare11.com /weather/wx_forecast.aspx?storyid=75899 (462 words)

	Bill's Antique Gas Engines Fuel System Tips
		(what we call "suction" is actually high pressure trying to equalize by PUSHING into an area of lower pressure, just as a high pressure area in the atmosphere creates wind by pushing air into the low pressure area in an attempt to equalize pressures).
		Since we are trying to push the same number of molecules through a tiny area as we are through the larger area, they must move faster in the smaller area to maintain the same rate of flow.
		In an attempt to equalize, or fill in that low pressure area created by the "venturi effect", air pushes up the tube, pushing up on the liquid that is in its way.
	www.oldengine.org /members/billd/fuel.htm (1015 words)

	Synopsis of the Storm of January 26, 1998 through January 29, 1998 (Site not responding. Last check: 2007-10-21)
		On January 26, 1998, a weak area of low pressure formed in eastern Texas in association with a rapidly developing upper-level trough (Figure 2).
		By 7:00 AM on January 27, the area of low pressure had moved to a point along the panhandle of Florida and had begun to strengthen.
		As the storm began its movement to the northeast along the Atlantic Coast, strong east and northeast winds buffeted the Delmarva Peninsula in association with the counterclockwise circulation around the area of low pressure.
	www.udel.edu /dgs/Publications/pubsonline/OFR40/1998janstorm.htm (320 words)

	Class 16: Atmospheric Conditions and Weather
		At the poles, a high pressure area exists because cold air is sinking and flowing along the surface toward the equator.
		Air circulation around low pressure centers: The general term cyclone is used for an area of low pressure in the atmosphere that displays circular inward movement of air.
		The coupled sea and land breeze is typically found along coastlines adjacent to large bodies of water and results from differences between the heating or cooling of the water and the adjacent land.
	www.unc.edu /depts/ed/cite/samples/class16/pressure.htm (1075 words)

	Re: Cloud when breaking soundbarrier - Jets Forums
		What is happening is that the cloud is created in the low pressure area, the low pressure area moves forward, and the cloud dissappears.
		The mechanism is completely different, but this is also a low pressure area where the moisture in the air condenses.
		A large area above the wing becomes a low pressure area and a "cloud" forms during the duration of the maneuver, usually only a second or less.
	www.jets.dk /forums/ShowPost.aspx?PostID=2829 (437 words)

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