Just saw this…
Your Weather Centered: Weather Underground Introduces the Radius App for iPhone
This looks decent and it is a separate app, rather than yet another deviation of their primary app.
Weather Underground needs to dial back their app design changes. Their user community content providers have been extraordinarily unhappy with them since the NBC buyout and the Weather Channelization of Weather Underground.
There was nothing but vitriol when they released the beta web interface, recently.