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Whenever we decide to go out, we always check the forecast for the day. We usually do this on the news channels or with the help of our mobile phones. It helps us decide if we need an umbrella for the day or if we need our sunglasses. The weather forecast even notifies people of certain weather events well into the future so that they can prepare themselves for it. It has made our lives so easy, but have you ever wondered how the news channels know what the weather is going to be like? How does it work? The answer to this timeless question lies in mathematics and observational data. Various sources, such as weather stations, satellites, sea buoys, commercial airliners and ships gather data all around the world. Yes, even your airplane is a source of data! In total, billions of observations are made every single day. Regular PCs or the laptop I used to type this article
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