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Meteorology is a branch of the atmospheric sciences (which include atmospheric chemistry and physics) with a major focus on weather forecasting. The study of meteorology dates back millennia , though significant progress in meteorology did not begin until the 18th century.
Extratropical cyclone – a low-pressure weather system occurring in the middle latitudes of the Earth having neither tropical nor polar characteristics; Weather front – a boundary separating two masses of air of different densities; the principal cause of meteorological phenomena
In meteorology, an air mass is a volume of air defined by its temperature and humidity. Air masses cover many hundreds or thousands of square miles , and adapt to the characteristics of the surface below them.
Severe weather can occur under a variety of situations, but three characteristics are generally needed: a temperature or moisture boundary, moisture, and (in the event of severe, precipitation-based events) instability in the atmosphere.
A weather front is the boundary of two air masses with different characteristics. Frontal precipitation is the result of frontal systems surrounding extratropical cyclones or lows, which form when warm and tropical air meets cooler, subpolar air. Frontal precipitation typically falls out from nimbostratus clouds. [5]
A mesoscale convective complex (MCC) is a unique kind of mesoscale convective system which is defined by characteristics observed in infrared satellite imagery. Their area of cold cloud tops exceeds 100,000 square kilometres (39,000 sq mi) with temperature less than or equal to −32 °C (−26 °F); and an area of cloud top of 50,000 square ...
Also actiniform. Describing a collection of low-lying, radially structured clouds with distinct shapes (resembling leaves or wheels in satellite imagery), and typically organized in extensive mesoscale fields over marine environments. They are closely related to and sometimes considered a variant of stratocumulus clouds. actinometer A scientific instrument used to measure the heating power of ...
A weather front is a boundary separating air masses for which several characteristics differ, such as air density, wind, temperature, and humidity.Disturbed and unstable weather due to these differences often arises along the boundary.