The highest AQ index in Indiana (as of 14:00 CDT) is currently the Hammond-Gary area. Ozone (OZONE) is measuring at 108 (Unhealthy for Sensitive Groups). This means members of sensitive groups may experience health effects. The general public is less likely to be affected.
Over the next few days, the highest Particle Pollution (PM2.5) will be in the Evansville area. It is forecasted to be Moderate, meaning air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Values for ozone were good Tuesday and PM2.5 was a mix of good and moderate. In SW Indiana, showers and thunderstorms are possible as a low pressure system passes to the south. Otherwise conditions are forecast to be partly sunny with a light and variable wind. Shower and thunderstorm chances are possible Thursday as well with SW winds 0-10 MPH. Rain chances become more widespread as we end out the workweek. Temperatures are forecast to be in the upper 80's Wednesday and low 90's Thursday. Dew points are forecast to be in the low to mid-70's Wednesday and Thursday. The NOAA 06Z BC model for PM2.5 forecasts moderate levels for the upcoming days. The Canadian model for PM2.5 forecasts good levels. I think moderate is more likely due to observations this morning, warmer temperatures, high dewpoints, and rain not yet being widespread. The NOAA 06Z BC model for ozone predicts good Wednesday and a mix of good and moderate levels Thursday. The Canadian model predicts good Wednesday and high-end moderate Thursday. Given yesterday's observations, a mix of good and moderates are possible with otherwise good, it is unlikely to see widespread moderate with the dewpoints in the 70's and the cloud cover. SW Indiana especially likely to be good with rainfall chances. Mixing heights are forecast to be around 4,000 ft. Wednesday and 5,000 ft. Thursday.
| Range | 0 - 50 | 51 - 100 | 101 - 150 | 151 - 200 | 201 - 300 | 301 - 500 |
| Color | ||||||
| Category | Good | Moderate | Unhealthy for Sensitive Groups | Unhealthy | Very Unhealthy | Hazardous |
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Below is a list of counties in Indiana. Click on any county below and you'll get a list of cities where we provide AQ index forecasts.