The featured chart displays the combination of recent monthly precipitation departures for Ames along with the monthly El Nino 3.4 index value. Many scientists believe that the El Nino index, which determines if we are in La Nina or El Nino condition, is correlated with longer timescale temperature and precipitation in the United States and elsewhere. The chart nicely shows the drought periods of the past two years and the wet periods of 2008 and 2010. This October looks to turn wet for the rest of the week with showers arriving late this evening.

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Tags:   elnino