So the Weather Underground site has been redesigned for the first time in 16 years, which you can read more about here: Redesign Update
I found this to be entertaining:
How long will the classic site be available?
The classic site is not going anywhere. We will be running it alongside the new site but as we add new features and data the classic site will not benefit from these additions. For further reassurance, I can tell you that we are still running our Telnet site from back in 1992 before The Internet took over.