Met Office boss John Hurst claims that the new £41million super computer is capable of delivering accurate weather forecasts up to a century in advance.
He claims that this will help us to be better prepared for extreme weather - such as the floods that affected northern England last week - so that preventative action can be taken.
He said that taxpayers would be well-served by the computer because it would ensure that Britain leads the world in climate science.
The Express reports that £20.7million was invested in the project last year alone, and said that this "will enable the Met Office to deliver more accurate forecasts, from hours to a century ahead."
The Met Office has now completed the third phase of its IBM super computer project, having spent £30million.
An additional £11million from Whitehall was announced earlier this year, after the Commons Science and Technology committee urged the Government to release more money.
The computer is so powerful that the Met Office has installed solar panels on its Exeter headquarters to lesson its huge carbon footprint.