State of the Climate in 2011
. The National Climate Data Center has released its annual State of the Climate report for 2011. The report details global climate indicators, notable weather events, and other data collected around the world through various methods. The lead characteristic of the 2011 climate picture was a double-dip La Niña, which is the cool phase of the El Niño-Southern Oscillation and usually lowers global average surface temperatures. Despite this, 2011 still ranked near the top of the hottest years on record when taken in historical context and was above the 1981-2010 global average. Notable weather events included the worst flooding in Thailand in 70 years, drought and deadly tornado outbreaks in the United States, devastating flooding in Brazil, an extreme summer heat wave in Central and Southern Europe, an unusually active Atlantic hurricane season, and drought in East Africa.