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	Weather Fronts (Site not responding. Last check: 2007-11-02)
		Cold fronts tend to be associated with cirrus well ahead of the front, strong thunderstorms along and ahead of the front, and a broad area of clouds immediately behind the front (although fast moving fronts may be mostly clear behind the front).
		Cold fronts almost always are easier to locate on a weather map than are warm fronts, primarily because of the strength of the high pressure system to the north and west of the cold front compared to that north of a warm front.
		Warm fronts are associated with a frontal inversion (warm air overrunning cooler air).
	okfirst.ocs.ou.edu /train/meteorology/Fronts.html (864 words)

	NWS LOUISVILLE: Basic Weather Discussion
		Relatively cool or cold air is present ahead of a warm front with warmer air behind the front, i.e., the opposite from that of cold fronts.
		A stationary front is similar to a warm front, i.e., warm air is present behind it (to its south) with cool air ahead of it (to its north).
		Warm air is located ahead of the cold front and behind the warm front (the so-called "warm sector"), while cool air exists ahead of the warm front and cold air is present behind the cold front.
	www.crh.noaa.gov /lmk/soo/docu/basicwx.php (1430 words)

	Migratory Lows: Hawaii Weather Patterns
		The front is a transition between warm and cold air masses, so a typical sequence would be: warm, humid conditions, heavy weather at the transition, cold, clear conditions.
		The difference in temperature between air masses at a warm front in the vicinity of Hawai'i is generally very small and, thus, associated heavy weather is rare.
		Most warm fronts pass north of the Islands, but if they do pass over, the Hawai'i may experience increased cloudiness and instability, followed by hot, humid weather, and southerly winds.
	apdl.kcc.hawaii.edu /~earth/front.htm (666 words)

	USATODAY.com (Site not responding. Last check: 2007-11-02)
		A warm front is the boundary between warm and cool, or cold, air when the warm air is replacing the cold air.
		The warm front symbol on a weather map marks the warm-cold boundary at the earth's surface.
		Since warm air is lighter and less dense than cold air, the cold air ahead of a warm front at the surface must retreat before warm air can move in.
	www.usatoday.com /weather/tg/wwfront/wwfront.htm (316 words)

	Warm Front: transition zone from cold air to warm air
		A warm front is defined as the transition zone where a warm air mass is replacing a cold air mass.
		Warm fronts generally move from southwest to northeast and the air behind a warm front is warmer and more moist than the air ahead of it.
		Symbolically, a warm front is represented by a solid line with semicircles pointing towards the colder air and in the direction of movement.
	ww2010.atmos.uiuc.edu /(Gh)/guides/mtr/af/frnts/wfrnt/def.rxml (258 words)

	7(r) Air Masses and Frontal Transitional Zones
		A cold front is the transition zone in the atmosphere where an advancing cold, dry stable air mass displaces a warm, moist unstable subtropical air mass.
		A warm front is the transition zone in the atmosphere where an advancing warm subtropical, moist air mass replaces a retreating cold, dry polar air mass.
		Warm type occlusions are common on the west coast of continents and generally form when maritime polar air collides with continental polar or arctic air.
	www.physicalgeography.net /fundamentals/7r.html (794 words)

	Air Masses, Fronts, Cyclones, and Anticyclones
		Fronts are also associated with a trough of low pressure, thus as the front approaches, pressure falls.
		The air behind the cold front is warmer than the cold air ahead of the warm front.
		Occluded fronts are typically “diffuse” at the surface, which means they are difficult for a meteorologist to locate, since temperature and moisture differences may be small, and the precipitation shield is broad.
	www.missouri.edu /~lupoa/atms10512.htm (706 words)

	Weather_Frontal Systems
		Warm air will always rise over cooler air so both the cold and warm fronts are inclined toward the warm air mass.
		Warm air is pushed up and over the advancing cold front, causing relatively rapid cooling and condensation that results in the development of tall cumulonimbus clouds that host heavy but relatively short-lived precipitation.
		Warm air is forced to rise above the more gently sloping warm front, resulting in the formation of a series of low to high clouds.
	www.mhhe.com /earthsci/geology/mcconnell/weather_systems/front.htm (793 words)

	Precipitation Along a Warm Front: warm moist air overriding colder air
		Warm air rides along the front (up and over the cold air mass), cooling as it rises, producing clouds and precipitation in advance of the surface warm front.
		The lighter warm moist air behind the front is lifted upward and "overrides" the colder air.
		Because the frontal surface gently slopes up and over the cold air mass ahead of it, the upward motions associated with warm fronts are typically not as strong as the vigorous upward motions that occur ahead of a cold front.
	ww2010.atmos.uiuc.edu /(Gh)/guides/mtr/af/frnts/wfrnt/prcp.rxml (256 words)

	AS 3 Lecture Screens (Site not responding. Last check: 2007-11-02)
		In a middle latitude cyclone, a warm front and a cold front are spinning around a surface low.
		An occluded front is essentially a cold front that is overtaking a warm front.
		In a warm occlusion, the weather preceding and following the front looks like warm front weather, except the precipitation is more intense and the winds are more gusty and variable while the front is passing.
	www.atmos.ucla.edu /AS3/scrns/airmassfront/Note06.html (335 words)

	THE ATMOSPHERE (Site not responding. Last check: 2007-11-02)
		Occluded fronts are very complex fronts that occur when one (usually cold) front overtakes another, slower moving, (usually warm) front.
		eventually all warm sector is forced aloft and cold air surrounds bottom of cyclone, and pressure gradients weakens and cyclone dissipates.
		Goes from surface warm sector ascends up sloping warm front (cooling produces clouds and precipitation) then turns and is incorporated with upper level westerlies.
	www.jhu.edu /~eps/faculty/waugh/fluid_earth/fe_3w.htm (1388 words)

	Surface weather analysis - Wikipedia, the free encyclopedia
		Cold fronts are often closely associated with low pressure systems, normally lying at the leading edge of high pressure systems and, in the case of the polar front, at approximately the equatorward edge of the high-level polar jet.
		In a warm occlusion, the air mass overtaking the warm front is not as cool as the cold air ahead of the warm front, and rides over the colder air mass while lifting the warm air.
		Fronts are the principal cause of significant weather.
	en.wikipedia.org /wiki/Warm_front (2583 words)

	Meteorology- Online
		Fronts are often the scene of the most dramatic weather changes can stay in place or move.
		Fronts normally are parts of larger weather systems centered on areas of low atmospheric pressure.
		Warm air begins advancing on the east side¢wcreating a warm front.
	library.thinkquest.org /C0112425/stu_stormsfronts.htm (1103 words)

	The Weather Network · Glossary Index (Site not responding. Last check: 2007-11-02)
		A warm front is the leading edge of a milder or warmer air mass.
		A warm front travels in such a way that it results in warm air replacing colder air.
		As the warm air travels upwards, it begins to mix with the cold air aloft and condenses to form clouds.
	www.theweathernetwork.com /inter/help/glossary/pages/warmfront.htm (95 words)

	Air Masses and Fronts (Site not responding. Last check: 2007-11-02)
		Fronts are drawn as lines on a map, but really they are more like zones of transition between two different air masses.
		In general, cold fronts are associated with abrupt, short-lived weather, and warm fronts are associated with gentle, long-lived weather.
		Another "front" that sometimes appears on surface weather maps is the dryline or dew-point front.
	www.geog.umn.edu /faculty/klink/geog1425/front_airmass.html (484 words)

	Weather Systems - Frontal Systems
		Cold fronts and warm fronts are associated with the interaction of continental polar and maritime tropical air masses over the central U.S. Heavy rainfall, decreasing temperatures, decreasing humidity, and changing wind directions are associated with passage of a cold front.
		The cold front is pictured as steep in Figure 11 but its actual inclination is ~1 degree toward the warm air (not much, but twice as steep as a warm front).
		Warm air is pushed up and over the advancing cold front, causing relatively rapid cooling and condensation that results in the development of tall cumulonimbus clouds that host heavy but relatively short-lived precipitation (Fig.
	www.mhhe.com /earthsci/geology/mcconnell/wea/front.htm (841 words)

	7(s) The Mid-Latitude Cyclone
		In their mature stage, mid-latitude cyclones have a warm front on the east side of the storm's center and a cold front to the west.
		Behind the surface position of the cold front, forward moving cold dense air causes the uplift of the warm lighter air in advance of the front.
		As a result, the late stages of cyclogenesis occur when the cold front overtakes the warm front causing the air in the warm sector to be lifted into the upper atmosphere (Stages 6 and 7).
	www.physicalgeography.net /fundamentals/7s.html (1275 words)

	Warm Advection Wins Again
		is incorrect because "cold advection" relates directly to the strength of a cold front and, more explicitly, to the strength of the mesoscale solenoidal lifting of the warm air ahead of the front.
		Warm advection into an air column increases thicknesses locally, and raises the heights aloft (e.g., 300 mb level).
		The forecaster alludes to the "enhancement of the clouds" and connects that with the divergence associated with the left-front quadrant of a jet strteak and "upper diffluence." As an aside, I remind students that "diffluence" is definitely NOT the same thing as divergence.
	home.earthlink.net /~montever/warmadv/qg2.html (1205 words)

	Weather Fronts (Site not responding. Last check: 2007-11-02)
		Cold fronts move faster than their warm counterparts because they are denser, and so they gather momentum.
		A warm front is in blue, and the semi-circles serve the same function as the triangles.
		A stationary front is marked with alternating triangles and semi-circles, both pointing in opposite directions, and is shown alternating between red and blue.
	www.jessefriedman.com /writings/weatherfronts.shtml (695 words)

	Warm Fronts
		A warm front exists when warm air is rising over cold air.
		When the surface warm front arrives, there may be a burst of rather heavier rain, and this offers a hopeful sign that a drier interlude is on the way.
		On synoptic (weather) charts a warm front is represented by a solid line with semicircles pointing towards the colder air and in the direction of movement.
	www.ace.mmu.ac.uk /eae/Weather/Older/Warm_Fronts.html (261 words)

	Weather Fronts
		This is followed by the cold front behind it over to the left we see near the top a warm front and then in purple an Occluded Front.
		Warm fronts have vast areas of layer cloud which in the last 150 miles low cloud base poor visibility icing followed by mist and humidity and persistent drizzle rain sleet or snow.
		Cold fronts are short in length but have massive air instability causing turbulence and heavy short shows visibility better than the warm front.
	www.avsim.com /geoffschool/weather_fronts.htm (1530 words)

	FRONTS and STORMS
		At the front, cold polar air is moving eastward while warm, moist Pacific air is flowing to the west.
		The Midwest is especially vulnerable in the spring because of the clash between cold polar air and warm Gulf air.
		They feed from the warm, moist water requiring a surface T of +80 degrees F, and can not be sustained over land or cold water.
	geology.csupomona.edu /drjessey/class/Gsc101/Fronts.html (679 words)

	Warm Fronts
		A warm air front is the place where a warm air mass replaces a cool air mass.
		The air behind a warm front is warmer than the air ahead of it.
		We said before that the temperature ahead of the warm front is usually colder than the temperature behind the warm front.
	www.ecn.ac.uk /Education/warm_fronts.htm (379 words)

	Warm Front
		A warm front is located where a warm air mass is replacing a cold air mass.
		Warm fronts possess a gentle slope to their frontal surface.
		Stratus-type clouds are typically found along a warm front.
	www.uwsp.edu /geo/faculty/ritter/glossary/V_Z/warm_front.html (58 words)

	What are cold fronts and warm fronts?
		Fronts are the boundaries between air masses of different temperature.
		Usually, a cold front will be associated with a warm front, with a low pressure center, connecting them (see above).
		This frontal "system" can be thought of as separating a cold air mass from a warm air mass, and the two different types of fronts simply indicate which direction those portions of the different air masses are moving.
	www.weatherquestions.com /What_are_fronts.htm (254 words)

	Front
		A front is the boundary line of the mass of cold air, and a warm air mass.
		There are four kinds of fronts, a warm front, a cold front, a occluded front, and a stationary front.
		Because warm air is lighter than cold air, it climbs on cold air slowly.
	library.thinkquest.org /C0125863/weather/front.html (182 words)

	Eaga Group \| Apply for a Grant \| Warm Front - England
		The Warm Front Grant was originally introduced in 2000 and was amended in June 2005 to include Central Heating for all clients and oil central heating for those not on the gas distribution network.
		The Warm Front Grant provides a package of energy efficiency and heating measures up to the value of £2,700 (except where oil central heating is installed or repaired where a maximum grant of £4,000 is available).
		If the property has previously received any measures under Warm Front, the value of the grant available to the existing householder under Warm Front will be the balance of £2,700 or £4,000 if oil central heating is involved, less the value of all works previously completed in the property under Warm Front since June 2000.
	www.eagagroup.com /grants/warmfront/index.htm (274 words)

	Fronts---don't even think about saying Low Front!! (Site not responding. Last check: 2007-11-02)
		Fronts are commonly associated with a moisture gradient, a pressure trough, a wind shift and/or various sensible weather phenomena.
		- Warm fronts are marked by red lines with half circles penetrating the cold air and indicating the direction of motion.
		However if the air on the warm side of the front is unstable, thunderstorms and showers are possible.
	weather.cod.edu /sirvatka/fronts.html (338 words)

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