搜尋結果
❗ 豪雨特報
鋒面接近，今（２７）日南投、花蓮、高雄山區及屏東地區有局部大雨發生的機率，請注意瞬間大雨及強陣風，山區請慎防坍方及落石。
發布時間：05/27 18:41
美國
晴朗30°15°17°C- Monday局部多雲30°15°
- Tuesday陣雨28°16°
- Wednesday雷雨29°16°
- Thursday陰28°17°
- Friday雷雨28°17°
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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. Weather refers to day-to-day temperature ...
Arctic oscillation. The Arctic oscillation ( AO) or Northern Annular Mode / Northern Hemisphere Annular Mode ( NAM) is a weather phenomenon at the Arctic pole north of 20 degrees latitude. It is an important mode of climate variability for the Northern Hemisphere. The southern hemisphere analogue is called the Antarctic oscillation or Southern ...
In aviation, visual meteorological conditions ( VMC) is an aviation flight category in which visual flight rules (VFR) flight is permitted—that is, conditions in which pilots have sufficient visibility to fly the aircraft maintaining visual separation from terrain and other aircraft. They are the opposite of instrument meteorological ...
A whiteout is a reduction and scattering of sunlight. [4] [better source needed] Cause: Sunlight is blocked, reduced and scattered by ice crystals in falling snow, wind-blown spin-drift, water droplets in low-lying clouds or localised fog, etc. The remaining scattered light is merged and blended. Result: Due to a reduction in reflected light ...
The climate in the United Kingdom is defined as a humid temperate oceanic climate, or Cfb on the Köppen climate classification system, a classification it shares with most of north-west Europe. [1] Regional climates are influenced by the Atlantic Ocean and latitude. Northern Ireland, Wales and western parts of England and Scotland, being ...
In meteorology, the synoptic scale (also called the large scale or cyclonic scale) is a horizontal length scale of the order of 1,000 km (620 mi) or more. This corresponds to a horizontal scale typical of mid-latitude depressions (e.g. extratropical cyclones).Most high-and low-pressure areas seen on weather maps (such as surface weather analyses) are synoptic-scale systems, driven by the ...
The National Weather Service ( NWS) is an agency of the United States federal government that is tasked with providing weather forecasts, warnings of hazardous weather, and other weather-related products to organizations and the public for the purposes of protection, safety, and general information. It is a part of the National Oceanic and ...
