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For any modeling the five most recently available years should be used. The Office of Air Quality has 2008 to 2012 data for the following National Weather Service Sites: Covington, Evansville, Fort Wayne, Indianapolis, Louisville and South Bend. This data is combined with the upper air stations of Wilmington, Ohio and Lincoln, Illinois.
For archived historical meteorological data please call IDEM’s Office of Air Quality (OAQ) at (317) 233-0178.