Ozone and PM2.5 Air Quality Index (AQI) Forecast
Issued: Wednesday, April 29, 2026, 2:32 PM
Wednesday, as a weak cold front slowly moves southward into the Bayou State, increasing clouds and periods of rain will limit ozone formation. However, southerly winds will carry thin-density smoke from the western Gulf into the western and northern portions of Louisiana. These conditions will yield Good to low-Moderate AQI levels. Thursday, as the cold front gradually advances through southern Louisiana, clouds and showers will continue to inhibit ozone production. Furthermore, periods of moderate northeasterly winds will disperse pollutants and bring cleaner air into northern and central portions of the state, leading to Good to high-Good AQI levels. However, across southern Louisiana, lighter northeasterly winds limit dispersion and gradually recirculate thin smoke into the area, leading to high-Good to low-Moderate AQI levels. Friday, a low-pressure system over southern Texas will produce moderate northeasterly winds in Louisiana, effectively dispersing pollutants and bringing cleaner, cooler air into the state. Therefore, AQI levels will be Good statewide.
| Ozone |
47 - Good |
44 - Good |
39 - Good |
| PM25 |
50 - Good |
53 - Moderate |
44 - Good |
| Ozone |
37 - Good |
34 - Good |
31 - Good |
| PM25 |
53 - Moderate |
44 - Good |
39 - Good |
| Ozone |
33 - Good |
32 - Good |
30 - Good |
| PM25 |
56 - Moderate |
53 - Moderate |
44 - Good |
| Ozone |
33 - Good |
39 - Good |
33 - Good |
| PM25 |
50 - Good |
50 - Good |
44 - Good |
| Ozone |
29 - Good |
31 - Good |
28 - Good |
| PM25 |
56 - Moderate |
39 - Good |
33 - Good |
| Ozone |
49 - Good |
46 - Good |
39 - Good |
| PM25 |
39 - Good |
44 - Good |
39 - Good |
| Ozone |
28 - Good |
31 - Good |
29 - Good |
| PM25 |
56 - Moderate |
44 - Good |
39 - Good |
| Ozone |
37 - Good |
38 - Good |
34 - Good |
| PM25 |
33 - Good |
44 - Good |
39 - Good |