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Weather means the atmospheric conditions, including wind, temperature and precipitation, in a specific area at a specific time.

Weather refers to atmospheric conditions such as , , and , all of which have a large influence over aviation activities, especially flights. Weather is a key factor in , but also affects and , and is always included in .

National weather services usually prepare aviation-specific forecasts and other information, and there are international formats for describing weather in aviation terms. Among the most well known are s and s, which are current observations and forecasts for a specific or weather observation point.

This tag is appropriate for all questions where weather is a factor, including weather observation and forecasting (for aviation specifically), the effect of weather on aircraft and flight planning, in-flight operational considerations, etc..