Weather front

frontal systemfrontal boundaryfrontcold frontfrontalweather frontsbaroclinic zonefrontsfrontal zonefrontal systems
A weather front is a boundary separating two masses of air of different densities, and is the principal cause of meteorological phenomena outside the tropics.wikipedia
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Air mass

air massesair streamMaritime Tropical air masses
A weather front is a boundary separating two masses of air of different densities, and is the principal cause of meteorological phenomena outside the tropics.
Weather fronts separate air masses with different density (temperature and/or moisture) characteristics.

Thunderstorm

thunderstormssevere thunderstormelectrical storm
Cold fronts may feature narrow bands of thunderstorms and severe weather, and may on occasion be preceded by squall lines or dry lines.
Thunderstorms result from the rapid upward movement of warm, moist air, sometimes along a front.

Warm front

warm sectorwarmGulf moisture
Warm fronts are usually preceded by stratiform precipitation and fog.
A warm front is a density discontinuity located at the leading edge of a homogeneous warm air mass, and is typically located on the equator-facing edge of an isotherm gradient.

Cold front

cold frontsArctic blastcold
Cold fronts may feature narrow bands of thunderstorms and severe weather, and may on occasion be preceded by squall lines or dry lines.
If instability is less, a broad shield of rain can move in behind the front, which increases the temperature difference across the boundary.

Surface weather analysis

cold frontsurface analysissurface
In surface weather analyses, fronts are depicted using various colored triangles and half-circles, depending on the type of front.
Weather maps are created by plotting or tracing the values of relevant quantities such as sea level pressure, temperature, and cloud cover onto a geographical map to help find synoptic scale features such as weather fronts.

Trough (meteorology)

troughupper-level troughtroughs
If the air mass is colder than the ground below it, it is labeled k. If the air mass is warmer than the ground below it, it is labeled w. Fronts separate air masses of different types or origins, and are located along troughs of lower pressure.
A trough is an elongated (extended) region of relatively low atmospheric pressure, often associated with fronts.

Weather map

weather chart850 mb pressure surfacemap
A surface weather analysis is a special type of weather map which provides a view of weather elements over a geographical area at a specified time based on information from ground-based weather stations.
Maps using isotherms show temperature gradients, which can help locate weather fronts.

Frontogenesis

redevelopedfrontogenetic processesfrontogenetical
However, this concept isn't an accurate description of the physical processes; upward motion is not produced because of warm air "ramping up" cold, dense air, rather, frontogenetical circulation is behind the upward forcing.
Frontogenesis is a meteorological process of tightening of horizontal temperature gradients to produce fronts.

Occluded front

occludedtrowaloccluded low
Cold fronts and occluded fronts generally move from west to east, while warm fronts move poleward.
In meteorology, an occluded front is a weather front formed during the process of cyclogenesis, when a cold front overtakes a warm front.

Synoptic scale meteorology

synoptic scalesynopticsynoptic-scale
Weather maps are created by plotting or tracing the values of relevant quantities such as sea-level pressure, temperature, and cloud cover onto a geographical map to help find synoptic scale features such as weather fronts.
Weather maps are created by plotting or tracing the values of relevant quantities such as sea level pressure, temperature, and cloud cover onto a geographical map to help find synoptic scale features such as weather fronts.

Dry line

drylinedry weather front
Cold fronts may feature narrow bands of thunderstorms and severe weather, and may on occasion be preceded by squall lines or dry lines.

Haboob

haboob (type of sandstorm)sand storm
If outflow boundaries or squall lines form over arid regions, a haboob may result.
A haboob is a type of intense dust storm carried on an atmospheric gravity current, also known as a weather front.

Mesoscale convective system

Mesoscale convective systemsdisturbancemesoscale
Organized areas of thunderstorm activity not only reinforce pre-existing frontal zones, but can outrun cold fronts in a pattern where the upper level jet splits apart into two streams, with the resultant Mesoscale Convective System (MCS) forming at the point of the upper level split in the wind pattern running southeast into the warm sector parallel to low-level thickness lines.
A mesoscale convective system's overall cloud and precipitation pattern may be round or linear in shape, and include weather systems such as tropical cyclones, squall lines, lake-effect snow events, polar lows, and Mesoscale Convective Complexes (MCCs), and generally forms near weather fronts.

Low-pressure area

area of low pressurelow pressure arealow pressure
On weather maps, the surface position of the cold front is marked with the symbol of a blue line of triangle-shaped pips pointing in the direction of travel, and it is placed at the leading edge of the cooler air mass. Cold fronts come in association with a low-pressure area.
Extratropical cyclones form as waves along weather fronts due to a passing by shortwave aloft or upper level jet streak before occluding later in their life cycle as cold-core cyclones.

Wind shear

windshearvertical wind shearshear
If the temperature differences of the two air masses involved are large and the turbulence is extreme because of wind shear and the presence of a strong jet stream, "roll clouds" and tornadoes may occur.

Extratropical cyclone

extratropicalextratropical transitionextratropical storm
In contrast with tropical cyclones, extratropical cyclones produce rapid changes in temperature and dew point along broad lines, called weather fronts, about the center of the cyclone.

Cyclogenesis

bombingCyclogenesis, extratropical cyclonesdeepening

Norwegian cyclone model

It was developed completely from surface-based weather observations, including descriptions of clouds found near frontal boundaries.

Orographic lift

orographicorographic liftingrelief precipitation
Orographic precipitation is precipitation created through the lifting action of air moving over terrain such as mountains and hills, which is most common behind cold fronts that move into mountainous areas.

Density of air

air densitydensityair
A weather front is a boundary separating two masses of air of different densities, and is the principal cause of meteorological phenomena outside the tropics.

Glossary of meteorology

meteorological phenomenameteorological phenomenonweather phenomena
A weather front is a boundary separating two masses of air of different densities, and is the principal cause of meteorological phenomena outside the tropics.

Temperature

temperaturesair temperaturewarm
Weather maps are created by plotting or tracing the values of relevant quantities such as sea-level pressure, temperature, and cloud cover onto a geographical map to help find synoptic scale features such as weather fronts. The air masses separated by a front usually differ in temperature and humidity.

Humidity

humidspecific humidityabsolute humidity
The air masses separated by a front usually differ in temperature and humidity.

Severe weather

severesevere weather warningsevere-weather
Cold fronts may feature narrow bands of thunderstorms and severe weather, and may on occasion be preceded by squall lines or dry lines.

Squall line

quasi-linear convective systemrain bandbanding
Cold fronts may feature narrow bands of thunderstorms and severe weather, and may on occasion be preceded by squall lines or dry lines.