Hurricane forecasters give up

American's top hurricane experts have admitted defeat and abandoned efforts to make a December forecast of the number of hurricanes the following year.
William Gray and Phil Klotzbach are famous for their advance predictions of how many storms are likely to hit during the following hurricane season, which runs from June to November.
But the pair, from Colorado State University, have now announced that a look back at the past 20 years of forecasts shows that their methods do not actually work.