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ORECASTS

A weather forecast is a prediction of weather conditions over a particular area, either for a few days (called a short-range forecast), or for several weeks (called a long-range forecast). The people who study the weather and make weather forecasts are called meteorologists.

WHY DO WE NEED WEATHER FORECASTS?

Weather forecasts help people to plan—what to wear, when to travel, or which products to stock in supermarkets. Forecasts are especially important for farmers, builders, sailors, and anyone else who works outdoors. Sometimes an accurate forecast may mean the difference between life and death.

HOW DO EXPERTS PREDICT THE WEATHER?

Meteorologists receive information about air temperature, wind speeds, clouds, and rainfall from over 50,000 weather stations worldwide—on land and on ships and buoys at sea. The data is fed into huge computers that produce charts and forecasts. These are used, with satellite images, to predict the weather.