In the summer of 2015 Washington state had several catastrophic wildfires that led to many days of heavy smoke in eastern Washington, Oregon and northern Idaho. The Northwest_Megafires dataset contains AirNow ambient monitoring data for the Pacific Northwest from May 31 through November 01, 2015 (UTC). Data are stored as a ws_monitor object and are used in many examples in the package documentation.
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Northwest_Megafires example dataset