Just 
a few years ago, meteorologists regularly shared an inside joke about forecasts: Anything beyond three days is a guess.
But on the heels of this week’s disastrous tornadoes in Moore, Okla., and Hurricane Sandy last October, it has never been more critical to be able to forecast long-range events. Big data analysis is turning the guesswork of yesterday’s meteorology into a more precise and predictive science.
Chris Morris: Journalist 