Weather forecast

A weather forecast is a prediction of what the weather will be in the future. Weather stations measure things such as temperature, air pressure and cloud cover. Meteorologists use these measurements and fluid dynamics and other methods to predict the weather. A forecast for many days in the future is less trustworthy than one for tomorrow or the next day.

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Weather Forecast Media

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  Forecast of surface pressures five days into the future for the North Pacific, North America, and the North Atlantic Ocean

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  The Royal Charter sank in an October 1859 storm, stimulating the establishment of modern weather forecasting.

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  Weather map of Europe, December 10, 1887

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  The difference between the forecast and the actual weather outcome for forecasts 3, 5, 7, and 10 days in advance.

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  BBC television weather chart for November 13, 1936

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  An example of 500 mbar geopotential height and absolute vorticity prediction from a numerical weather prediction model

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  Modern weather predictions aid in timely evacuations and potentially save lives and prevent property damage

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  Marestail shows moisture at high altitude, signalling the later arrival of wet weather.

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  An example of 500 mbar geopotential height prediction from a numerical weather prediction model

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  An example of a two-day weather forecast in the visual style that an American newspaper might use. Temperatures are given in Fahrenheit.