The British isles can expect an increase in stormy winter weather in the years ahead, according to Professor Len Shaffrey from the University of Reading. A warmer atmosphere is able to hold more moisture and produce more rainfall, he said at a conference, entitled The Wind That Shakes the Island, on Friday night at the Royal Dublin Society.“In a warmer climate one of the things we expect is that the atmosphere will be able to hold more moisture. For every degree the atmosphere gets warmer we expect moisture and, therefore, extreme rainfall to go up by 7%.”