I see people post from time to time, asking about free or inexpensive software to consume Level 2 and Level 3 radar data. With few free and/or open source options available, and being obsessed with weather for longer than I can remember, I've decided to challenge myself with developing a desktop application for tracking severe weather in my free time.
Supercell Wx is a free, open source application to visualize live NEXRAD Level 2 and Level 3 data, and severe weather alerts. It displays continuously updating weather data on top of a responsive map, providing the capability to monitor weather events using reflectivity, velocity, and other products.
You can find documentation here, including info for first-time setup:
Supercell Wx — Supercell Wx documentation
The latest release is available on GitHub:
Releases · dpaulat/supercell-wx
It's not as fully featured as many of the paid options out there, but it does provide a base level of functionality. I'm continuing to develop the application, and add new features. I've been using it myself to track some of the recent storms, and feel I'm ready to share my progress. I hope the community can benefit as well!