WeatherAI Analysis: Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake is currently rain at 25°C. Precipitation is likely — peak probability 80% around 10 PM. Atmospheric instability is elevated (CAPE up to 3052 J/kg) — isolated convective development possible. Sunrise: 6:35AM · Sunset: 7:40PM.
Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.