This third buoy, known affectionately as Chuoy, joins IISG buoys in the nearshore waters of Michigan City, Indiana and Wilmette, Illinois. Together, these three, along with two University of Illinois buoys closer to the Wisconsin border, paint a comprehensive picture of coastal lake conditions in the two states. 

This buoy is based in the busy waters off Navy Pier, approximately a mile due east of the pier. This new buoy with its flow of in-the-moment data is helping the National Weather Service (NWS) Chicago develop more accurate forecasts and warnings, especially related to nearshore wave heights and wind speeds. In addition to meteorologists, the data is used by scientists, boaters, anglers and beach goers.