Don't ask for whom the bell tolls, it tolls for Weather Underground. In starting to do research into data alternatives--I wanted to go back to the WU API forums to see what services folks were recommending there. Guess WU had other ideas, because it looks like they've taken down the forums completely. While this may have been planned all along, I'm guessing that they weren't too keen on hosting their own evisceration. The main API page doesn't even provide a link to the docs anymore, although those pages can still be reached through Google.
Right now, I'm leaning towards Dark Sky, which seems to be the best global alternative. It has a largely similar structure and would allow me to continue to support some important features like language. I'll do some leg work into determining what a port would require. There would certainly be some feature loss, but that's to be expected.
I surely don't mean for this to be any kind of competition with Perry's excellent Cynical Weather plugin or to imply that it's somehow lacking.One thing you can count on for sure. If I do come up with an alternative plugin, it will have a new name.