• Question: Why do clouds turn grey just before it is about to rain

    Asked by forrestgump to Alex, Jools, Lynz, Matt, Rika on 22 Jun 2011.
    • Photo: Julie Greensmith

      Julie Greensmith answered on 22 Jun 2011:

      As the water vapour in clouds turns to rain drops (geographers call it precipitation) the grey colour you see is dust particles and other impurities being trapped in the raindrops I think…..though I’m not an expert in this subject.

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