Elyse, I think you're thinking of the Gulf building. I not sure of the code, but you can look at the top of the building and tell the weather. I think if the top was blue, it meant rain an if it flashed on and off, it means thunderstorms. Orange was for fair weather. Before the USX tower was built, the Gulf building was the tallest in Pittsburgh. Like the Empire State building, it has it's own observation deck.
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