Wallpaper always 1/2 hour or more out of date

I use the US North Carolina AccuWx Radar/Satellite map as may wallpaper. It is always at least 1/2 hour, but usually one hour or so, out of date. What do I need to do to get a timelier map as my wallpaper?

The maps are updated by the 3rd party sources that own them. I don’t know of any maps that update in real-time. The best you can do is try switching to a map that’s maintained by a different 3rd party to see if it’s being updated more often.