TOKYO - Japan is planning ultra long-range 30-year weather forecasts that will predict typhoons, storms, blizzards, droughts and other inclement weather, an official said Tuesday.

The project, to start next year, will harness the powers of one of the world's fastest supercomputers and is an offshoot of ongoing research by the country's science ministry to map global warming trends for the next 300 years.

Using the Earth Simulator supercomputer, housed in a hangar-sized building in Yokohama, just south of Tokyo, Japan's science ministry hopes to calculate long-term patterns in the interaction of atmospheric pressure, air temperatures, ocean currents and sea temperatures, said Tomonori Otake, an official with the ministry's earth environment bureau.

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