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Weather forecasting is the application of science and technology to predict the state of the atmosphere for a particular location.
Human beings have tried to predict weather unofficially for millennia, and formally since the 19th century.
Weather forecasts are made by collecting quantitative data on the current state of the atmosphere in a given position, derived from so-called numerical weather models, and by using scientific understanding of atmospheric processes, we try to understand how the atmosphere will change. , and what effects it will have on humans.
Thus human endeavor is mainly to observe changes in barometric pressure, current weather conditions, and a brief picture of the sky.