Some areas experienced historic floods, others saw historic droughts. Is climate change to blame?
Natural Resources Defense Council
A once-in-five-hundred-year flood inundated the Mississippi River valley. A once-in-a-century drought in Texas shriveled the summer's crops and sparked sweeping forest fires. The deadliest tornado season on record tore communities to splinters. 2011 was clearly a year of extreme weather.
Two of the most consequential weather stories of the year were the drought in Texas and the tornado season in the Midwest. For most of the spring, summer, and fall, the Lone Star state was plagued by exceptional drought -- the highest level recorded by the U.S. drought monitor. The situation has eased somewhat in recent weeks, but climatologists say that because of the persistent pattern of La Niña (cooling off the coast of South America influencing the jet stream over North America), the drought is likely to linger into the new year.
ReutersWhile it is hard to blame all of this meteorological activity on global warming, 2011 provides evidence of a planet with a wilder climate.
"This year we had three weather events that matched or exceeded three U.S. weather extremes," Jeff Masters, a meteorologist and founder of The Weather Underground blog, says. The Mississippi flood was higher than any other, the Texas drought was drier than any other, and the tornado season was deadlier than any other. "It boggles my mind."
Additionally, Masters finds the records broken this year to be indicative of a more extreme planet. "Fifty-six percent of the U.S. had a top 10 percent wettest or driest year. That's a record." That divergent pattern is to be expected with climate change -- the wet areas will grow wetter, the dry areas drier.