Weather Forecasting

A daily weather forecast involves the work of thousands of observers and meteorologists all over the world, and the work of thousands of  machines. Modern computers make forecasts more accurate than ever, and weather satellites orbiting the earth take photographs of clouds from space.  Forecasters use the observations from ground and space, along with formulas and rules based on experience of what has happened in the past, and then make their forecast.

Observing Weather
A thermometer measures temperature.
A barometer measures air pressure.
A rain gauge measures precipitation.
An anemometer measures wind speed.
A radiosonde attached to a weather balloon measures weather high in the atmosphere.
A satellite takes pictures of clouds from space.
A radar shows where and how much rain is falling.
Eyes and ears observe clouds, precipitation, lightning, thunder.