Listening to today's weather forecast the presenter reported that some areas had received over 100mm of rain. Why not say 10cm? Industry is no better,often quoting sizes in 1000s of mm rather than so many metres and centimetres. Is this because 100mm might sound more impressive than just 10cm,or the current media trend to "big things up". Is it perhaps a desire to be as accurate as possible in reporting? What do members think and are there any similar examples?