Meet Pizilla. This project was originally the PiClock and published in Hackaday.
I hacked the code and came up with my own design. This is perfect for a older pi just collecting dust and a monitor sitting in the back closet.
This is a excellent tutorial for those who are just starting out with the Raspberry Pi 4. The tutorial is presented by the Raspberry Pi Foundation and can be found here.
First you need Mapbox key from here. The Darksky key from here. This will tell Pizilla what you current weather and forecast should be and set up the radar on your clock. Once you have them to need to be included in the config file.