Science: The Weatherman Goes to War

Reconnaissance flyers reported snow over the Leipzig area. But the big bombers took off on schedule that February morning. By the time they began their target runs over Leipzig's aircraft plants, it was sparklingly clear. For five more days the skies around Leipzig were blue and the ground was blackened by Allied bombs. The Air Forces weatherman had been dead right.

Analogues. This up-to-the-minute forecasting of weather 400 miles from the nearest Allied observation stations was not done by aching joints or a wet finger to the wind. It was done by long looking at past weather maps — called analogues —...

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