Hello @canerakin111​, thanks for posting! Would you be able to explain what NexRAD is and why you'd like to use it in FME? Am I correct in assuming NexRAD is a data format?

I found this, which looks like a map service, but I suspect you're looking to consume the radar products themselves? Intead, managed to find a few samples online (with the extension: .tar.Z), it looks like we can get a raster blob into FME using a HTTPCaller, but cannot extract the imagery as we don't support the format (eg. no format reader). If you're able to share a sample dataset, I can take a closer look, but I predict a similar result!

Have you considered creating an idea for this? I recommend creating an idea and potentially linking it here for other users to find. Happy to help, Kailin.