Climate Central: While the contiguous U.S. suffered through its second-most extreme weather year on record since 1910, with a litany of extreme events from scorching heat waves to parching drought affecting the country from coast-to-coast, there was one type of deadly and damaging severe weather that was notably missing: tornadoes. According to statistics from the Storm Prediction Center in Norman, Okla., 2012 had the fewest tornadoes since 1954, using adjusted figures to account for changes in tornado detection...