I just learned this past summer that https://radar.weather.gov/ has a feature where you can see the doppler velocities, rather than just the reflectivity as we usually see, so you can see the red/green map meteorologists use to identify tornadoes.
If you select a local radar rather than national radar, the .gov site shows super resolution base reflectivity, super resolution base velocity, dual-polarization precipitation type, dual-polarization differential reflectivity, high resolution echo tops, one hour precipitation accumulation, storm-relative motion, digital storm total, storm total precipitation, base velocity, composite reflectivity, and high resolution VIL.
I don't know know that VIL is, but it's measured in kilograms per square meter. I don't know what differential reflectivity is, or the difference between storm total and digital storm total. I need to go back to radar school. I remember seeing the old radar, with reflectivity only, on television, and when I learned about it, all we had was reflectivity and velocity. There's a significant suite of products available. Most of them are usable only when you select a local radar, I'm guessing that's because the data is based on a single source, and compositing it from multiple sources may not work very well. You can look at an area on a different radar if you want to see another angle.
The resolution is not as high as you see on television. NWS uses high-power radars, which can see a long way and can see through a storm and detect another storm behind it, but the resolution is lower. The little radars that are being deployed in my area in a denser grid every 20 or 30 miles are low-power; they give a lot of detail, but they're easily blinded by a storm and can't see very far. As far as I know, their output is not available to the public. As I understand it, television stations use medium-power radar, which is in between. It can give a reasonable level of resolution, for nice television, and can just about cover a media market area.
