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Same problem here - even after deleting and reinstalling the app immediately crashes back to the home screen.
 
Same also...

Rush Limbaugh actually called Weather Underground out on the air about it.

I didn't see any updates come through - so what has changed which would cause it to load, then crash?
 
Possibly something on Weather Undergorund's side or a service they are using (and not handling those exceptions all that well in the apps).
 
Well, it is back to working now. Guess they resolved whatever issue was occurring on their end.
 
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