The highest AQ index in Indiana (as of 1:00 EST) is currently the Bloomington area. Ozone (OZONE) is measuring at 31 (Good). This means air quality is satisfactory, and air pollution poses little or no risk.
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 12Z surface analysis depicts a stalled frontal boundary across northern Indiana. There’s a chance a few showers may reach the area thanks to this feature, mainly over the north. This boundary lingers over the area into tonight as a cold front from the west approaches the state. The cold front moves across the area during the day Tuesday and conditions then dry out for Tuesday night. Then a surface low pressure system moves across the Great Lakes region through midweek causing some deep troughiness over Indiana. Several different waves will move through this and cause various types of precipitation, from rain to snow. Well above normal temperatures and rain early this week will give way too much colder conditions and additional showers, with potential for the first snowflakes of the year Wednesday night into Thursday night. Gusty winds of around 25 to 30 mph can be expected much of the week thanks to the strong gradient. A robust 500 mb jet initially dives south of Indiana, however later Thursday it inches northward over the state with steering level winds more than 110 kt. 24 hours later the strongest portion of the jet has made it way to over the Carolina’s with much lower winds. Vorticity at 700 mb shows a strong vorticity maximum from out west move into the Mid-West and eventually over the Great Lakes before moving off to New England late in the week. 850 mb temperatures start out quite warm in the beginning of the period, then begin to break down too much colder temperatures by mid-week. By Wednesday afternoon the area is looking at around -2C, and -8C by Thursday morning. For the duration of this period, sky conditions will be cloudy to mostly cloudy, even through Friday. Friday has some chances of rain in the afternoon due to a weak wave moving through the area. Generally used a blend of the EURO/GFS and partly the NAM for the beginning of the period. Air Quality model analysis and decision Fine Particulate: Canadian model is showing a mixture of Good and Moderate, mainly Moderate at the beginning of the period. 06Z NOAA Model guidance indicates Moderate for today for both sites, and then Good for the rest of the period through Wednesday. This is some pretty good model consensus, so going with Moderate for today (both sites) and Good for the rest of the forecast period through Friday due to the variable weather pattern and strong gusty winds.
| 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 8 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.