According to the National Weather Service, mean surface temperature in the littoral Pacific Ocean along the coasts of Chile and Equador suggest a third year of La Nina.  The current cycle of two years has produced hot summer temperatures in the U.S. corn-producing states.  Only two instances of a three-year La Nina have been recorded since 1950.

A description of the El Nino/La Nina oscillation can be retrieved from the SEARCH block by entering ‘El Nino’.