Here is a short video on getting started. We need these for regional forecast work.
During the installation process, be sure to check the option to install high-resolution maps. For the Mac install, you will need to open System Preferences / Security and give the app permission to be installed. Install in the normal manner, and open the app. Choose the online installer for Mac or PC. Get the app from in the Downloads section. It also has the advantage of providing very convenient GRIB file selection and download from right within the app, including a wide range of models, and several unique European sources. We start with XyGrib because it is a free, easy to use Grib Viewer app that has both PC and Mac versions. Here we jump straight into the process by looking at a couple options for downloading and viewing the files. Methods of doing that, along with an overview of models and available weather are covered in Background on GRIB Files and Numerical Weather Forecasts. This should not be treated as a sole source of information, but it is extremely valuable once you have evaluated the forecast. A key aspect of modern weather work is the use of numerical weather model forecasts in Grib format.