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Forecast Discussion: Air quality forecast northern Indiana issued Monday, May 20, 2013 for Tuesday, May 21 - Friday, May 24. A warm front is currently located to the north and northwest of northern Indiana across the Upper Midwest extending eastward from a surface low pressure in western Minnesota through central Minnesota to extreme northern Wisconsin and northern Michigan. A cold front extends southward from the surface low across western Iowa and eastern Kansas into southwestern Oklahoma. This weather system will be the primary surface feature which will produce strong to severe thunderstorms from the Southern Plains northward and eastward into northern Indiana and the Lake Michigan region. All of northern Indiana is in the slight risk area for severe thunderstorms on Monday and Tuesday. The impact on the air quality will be a gradual transition to good air quality with ozone concentrations reaching the good range on Tuesday and fine particulates (PM2.5) reaching the good range by Wednesday. Expect good air quality for both pollutants on Thursday for all regions of northern Indiana. The next air quality forecast update will be on Thursday. Air quality forecast provided by IDEM, Office of Air Quality. |
Air Quality Index (AQI)
observed at 13:00 EDT
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