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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 shelf cloud, such as this one, can be a sign that a squall is imminent.. A mesoscale convective system (MCS) is a complex of thunderstorms that becomes organized on a scale larger than the individual thunderstorms but smaller than extratropical cyclones, and normally persists for several hours or more.
Aviation weather briefing service [6] Available at designated FSS's AWG American Wire Gage: The larger the size number, the smaller the wire diameter. AWIS Aviation weather information service [6] Available at FSS: AWO All weather operations AWOS Automated weather observation system [6] Automated METAR reporting system AWWS Aviation weather web ...
A Skew-T diagram with important features labeled. Convective inhibition (CIN or CINH) [1] is a numerical measure in meteorology that indicates the amount of energy that will prevent an air parcel from rising from the surface to the level of free convection.
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. The 19th century saw modest progress in the field after weather ...
The probability for severe weather is highest in the early stages of formation, during the afternoon. The MCC persists at its mature and strongest stage overnight and into the early morning in which the rainfall is characterized as stratiform rainfall (rather than convective rainfall which occurs with thunderstorms).
WX: weather; among pilots, “WX” is used for routine forecasts. More widely, if an aviation worker blames “weather”, they mean the kind that disrupts operations.
The emergence of weather radar in the mid-1900s and an improved understanding of thunderstorm behavior led to a increased recognition of a need to study phenomena between the scales studied in the extant disciplines of microscale and synoptic-scale meteorology. [2] The term "mesoscale" originated from M. G. H. Ligda at the Massachusetts ...