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GasMotion |
Any Motion where the patient is a Gas. This class would cover, in particular, the motion of Air, e.g. a breeze or wind.
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WeatherProcess |
WeatherProcess is the broadest class of processes that involve weather, including weather seasons (not to be confused with instances of SeasonOfYear), weather systems, and short-term weather events.
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AnabaticWind | AnabaticWind is a warm wind which blows up a steep slop or mountain side, driven by heating of slope through insolation. It typically occurs during the daytime in calm sunny weather. A hill or mountain top will be radiatively warmed by the Sun which in turn heats the air just above it. Air at a similar altitude over an adjacent valley or plain does not get warmed so much because of the greater distance to the ground below it.[Wikipedia] |
| | ChinookWind | ChinookWinds, or simply Chinooks, are two types of prevailing warm, generally westerly winds in western North America: Coastal Chinooks and interior Chinooks. The coastal Chinooks were the original term, used along the northwest coast, and the term in the interior of North America is later and derives from the coastal term. [Wikipedia] |
| | FohnWind | A FohnWind is a type of dry, relatively warm downslope wind in the lee of a mountain range. It is a rain shadow wind that results from the subsequent adiabatic warming of air that has dropped most of its moisture on windward slopes. As a consequence of the different adiabatic lapse rates of moist and dry air, the air on the leeward slopes becomes warmer than equivalent elevations on the windward slopes.[Wikipedia] |
| | HarmattanWind | HarmattanWind is a dry and dusty northeasterly trade wind, which blows from the Sahara over West Africa into the Gulf of Guinea. The name is related to the word haramata in the Twi language. The HarmattanWind blows during the dry season, which occurs during the months with the lowest sun. On its passage over the Sahara, the Harmattan picks fine dust and sand particles (between 0.5 and 10 microns). HarmattanWind blows in the season of Harmattan, of the same name, in West Aftica that occurs between end of November and middle of March.The HarmattanWind brings desert-like weather conditions: it lowers the humidity, dissipates cloud cover, prevents rainfall formation and sometimes creates big clouds of dust which can result in dust storms or sandstorms.[Wikipedia] |
| | KatabaticWind | KatabaticWind is a downslope wind caused by the flow of an elevated, high-density air mass into a lower-density air mass below under the force of gravity. A katabatic wind originates from the difference of density of two air masses located above a slope. This density difference usually comes from temperature difference, even if humidity may also play a role. Schematically katabatic winds can be divided into two types for which the mechanisms are slightly different: the katabatic winds due to radiative cooling (the most common) and the fall winds.[Wikipedia] |
| | Khamsin | Khamsin is a dry, hot, sandy local wind affecting Egypt and the Levant. From the Arabic word for fifty, these dry, sand-filled windstorms blow sporadically in Egypt typically after fifty days from the start of spring, hence the name. When the storm passes over an area, lasting for several hours, it carries great quantities of sand and dust from the deserts, with a speed up to 140 kilometers per hour (87 mph; 76 knots), and the humidity in that area drops below 5%. [Wikipedia] |
| | Mistral | The Mistral is a strong, cold, northwesterly wind that blows from southern France into the Gulf of Lion in the northern Mediterranean.[Wikipedia] |
| | PuelcheWind | PuelcheWind is a dry foehn-like eastern wind that occurs in south-central Chile. The wind owns its name from the Puelche people who inhabited the eastern slopes of the Andes.[Wikipedia] |
| | Sirocco | Sirocco or scirocco is a Mediterranean wind that comes from the Sahara and can reach hurricane speeds in North Africa and Southern Europe, especially during the summer season. Siroccos arise from warm, dry, tropical air masses that are pulled northward by low-pressure cells moving eastward across the Mediterranean Sea, with the wind originating in the Arabian or Sahara deserts.The hotter, drier continental air mixes with the cooler, wetter air of the maritime cyclone, and the counter-clockwise circulation of the low propels the mixed air across the southern coasts of Europe.The sirocco causes dusty dry conditions along the northern coast of Africa, storms in the Mediterranean Sea, and warm wet weather in Southern Europe. The sirocco does not affect other parts of Europe.[Wikipedia] |
| | Squall | A Squall is a sudden, sharp increase in wind speed lasting minutes, as opposed to a wind gust, which lasts for only seconds. In 1962 the World Meteorological Organization (WMO) defined that to be classified as a squall, the wind must increase at least 8 metres per second (29 km/h; 18 mph) and must attain a top speed of at least 11 metres per second (40 km/h; 25 mph), lasting at least one minute in duration.[Wikipedia] |
| | StrongWind | StrongWind consists of damaging winds, often originating from thunderstorms, that are classified as exceeding 58 mph. [FEMA, USA] |
| | WindGust | A WindGust is a sudden increase in the wind speed. It usually lasts for less than 20 seconds, briefer than a squall, which lasts minutes. A gust is followed by a lull (or slackening) in the wind speed. The average value of wind speed is generally measured over a period of 2 minutes before the meteorological observation according to the World Meteorological Organization. It is generally reported in METAR when the peak wind speed reaches at least 16 knots (30 km/h; 18 mph) and the variation in wind speed between the peaks and average wind is at least 9 to 10 knots (17 to 19 km/h; 10 to 12 mph).[Wikipedia] |