The highest AQ index in Indiana (as of 13:00 CST) is currently the Hammond-Gary area. Particle Pollution (PM2.5) is measuring at 54 (Moderate). This means air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Over the next few days, the highest Particle Pollution (PM2.5) will be in the Evansville area. It is forecasted to be Good, meaning air quality is satisfactory, and air pollution poses little or no risk.
Weather Forecast Discussion A few light mixed showers this morning, cloudy and foggy currently. A clipper in Illinois will move southeastward on a strong jet pushing a cold front far away by evening with showers ending early afternoon. A surface high pressure system will slowly move eastward over the northern plains and Great Lakes, keeping clear, chilly and light winds. Saturday 850 temps may drop down to -10 degrees. 8 degree warmth returns by Monday. That translates up to upper-40’s at the surface. The strong upper trough in the east half of the country will move out and weaken this weekend with the ridge in the southwest will weaken as well. A trough will approach the northern Great Lakes which trigger some possible showers for Monday. A fairly active pattern into next week. Air Quality model analysis and decision Fine Particulate: The NOAA 6Z BC forecast is for clear Goods for Sunday and Monday, while the GEMMACH gives Moderate for the weekend. Once this storm system leaves for the northeast cold, clear air from Canada will move in advance of high pressure in the northern plains. The weekend will be very cold, but Sunday could be still enough for Moderate particulates. Then Monday will be Good from stronger mixing from warmer return flow around that high pressure.
| 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 |
Last Updated 13 minutes ago
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.