A weather model is one of the most important tools in making a weather forecast. Now you can make your own weather forecasts using weather models from the National Weather Service!
It's one thing to look up at the lcouds from the ground. It's another to know how high those clouds are and how many layers of clouds are up there. You can figure that out with a quick glance at a cool weather chart called a SkewT.
Do you know the differences between high air pressure vs. low air pressure? Here's a simple explanation of high pressure vs low pressure in terms of weather