The La Nina of the past several months as determined by the 90-day average Southern Oscillation Index (SOI) has ended. The SOI is a measure of the atmospheric pressure deviation from normal and directly influences meteorological conditions in numerous distant locations. The SOI diminished to 0.8 standard deviations on May 19, 2008.
Iowa State University
Taylor, S. Elwynn, "La Nina Diminishes" (2008). Integrated Crop Management News. 920.
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