How are they going to do that when the original data has been destroyed?
Moreover, why would it take three years to analyze? Its a lame excuse for three more years of funding crap science.
What they destroyed was their copy that they accumulated from multiple national sources around the world. The "original" original data is still in whatever repositories the weather offices of various nations maintain. It's a question of going out and re-collecting and re-collating all of that information. I suggest they hire Steve McIntyre to head the effort.