Did you try the private version? https://my.roku.com/add/CLOCPRI
The Channel Store version may remain broken for a while until I rewrite it using the new SDK. The issue is so minor I'm not sure why weather.gov has a problem with the request for data, so it may start working again.
That fixed it.
I had the private screensaver installed, but somehow that got uninstalled in favor of the public version (must have deleted that one at least 10 times in the past) and when I loaded a new one with the link up this thread I didn't notice it was for the public version. Roku cares not about private versions apparently. When they did a sweeping upgrade my private cloc was replaced with the public cloc <--- and, of course, that one is busted.