Weather forecasting is like predicting what the weather will be like tomorrow or the next day. To figure out what the weather will be like, special people called meteorologists look at all the data about the atmosphere to make their prediction. They look at things like temperature, humidity, wind speed and direction, and pressure. They also use satellites to look at clouds and other signs in the sky. All of this information helps the meteorologists make a guess about what the weather will be like. Sometimes meteorologists are very accurate, but sometimes they're wrong. It all depends on what the atmosphere is like at the time.