Ok, it looks like weather.gov is finally switching to HTTPS. I've fixed the private version; get it here:
https://my.roku.com/add/CLOCPRIIf you weren't using it before, you'll have to select it from the screensaver settings and go through the "Custom settings" again.
I'll try to update the public (channel store) version, but who knows how long that will take or if it's even possible since I haven't updated it to use the new Roku SDK (shudders).
-JT