Throughout early to mid-January in the United States, there was isolated tornado activity, centered primarily in the South. Map of the tracks of all tornadoes in the United States in 2013Įntering 2013, the Oceanic Niño Index (ONI) for the three-month period lasting from November 2012 to January 2013 based on sea surface temperature (SST) anomalies was -0.3, denoting cooler than normal SSTs in areas of the Pacific. On April 1, Canada began utilizing the Enhanced Fujita scale to rate tornadoes with minor modifications to better suit the region's tornadoes.
Despite the high death toll along with several large outbreaks, the year was below average in terms of the number of tornadoes that occurred. One of these tornadoes was the largest ever at 2.6 miles wide. A total of 115 fatalities were confirmed worldwide in 2013: 55 in the United States, 36 in Bangladesh, 24 in China, three in Turkey and two in Brazil. There were 916 tornadoes confirmed in the United States in 2013. Tornadoes also appear regularly in neighboring southern Canada during the Northern Hemisphere's summer season, and somewhat regularly in Europe, Asia, and Australia. Strong and destructive tornadoes form most frequently in the United States, Bangladesh, Brazil and Eastern India, but they can occur almost anywhere under the right conditions. This page documents the tornadoes and tornado outbreaks of 2013.
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