Frequency of tornadoes, hail linked to El Nino, La Nina

Columbia University

A new study links the frequency of tornadoes and hailstorms in parts of the southern United States to ENSO, a cyclic temperature pattern in the Pacific Ocean. Now, a new study shows that El Niño and La Niña conditions can also help predict the frequency of tornadoes and hail storms in some of the most susceptible regions of the United States. Credit: Allen et al., Nature Geoscience, 2015 Last year, 47 people died in tornadoes. The scientists then verified the indices using available observational records. Second, the current study shows robust correlation only in the southern states, where the ENSO signal is especially clear.

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