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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 ...
Severe weather terminology is different around the world, varying between regions and countries. These are articles which explain terminology in various parts of the world. Severe weather terminology (United States) Severe weather terminology (Canada) Severe weather terminology (Japan) Hong Kong tropical cyclone warning signals
Weather is the state of the atmosphere, describing for example the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy. [1] On Earth, most weather phenomena occur in the lowest layer of the planet's atmosphere, the troposphere, [2] [3] just below the stratosphere.
This article describes severe weather terminology used by the National Weather Service (NWS) in the United States, a government agency operating within the Department of Commerce as an arm of the National Oceanic and Atmospheric Administration (NOAA).
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The following terms are consistent with the classifications of United States National Weather Service and the Meteorological Service of Canada: [3] Blizzard – Characterized by sustained wind or frequent gusts of 56 kilometres per hour (35 mph) or greater and falling or blowing snow that frequently lowers visibility to less than 400 metres (0. ...
The terms relate to meteorology, the interdisciplinary scientific study of the atmosphere that focuses on weather processes and forecasting. (see also: List of meteorological phenomena ) Part of a series on
The first daily weather forecasts made by FitzRoy's Office were published in The Times newspaper in 1860. The following year a system was introduced of hoisting storm warning cones at principal ports when a gale was expected. FitzRoy coined the term "weather forecast" and tried to separate scientific approaches from prophetic ones. [79]