Showers and thunderstorms are possible today, but severe weather is unlikely, and highs will be in the mid to upper 80s. A ground stop was issued at O'Hare Airport Tuesday morning as thunderstorms passed through the Chicago area. Chicago weather forecastWhat to expect:Today I’m watching an area of showers and thunderstorms approaching from the southwest. Highs however should make it into the mid 80s, which is still warmer than normal for this time of year. Pleasant weather continues on Thursday with sunshine and highs in the mid 80s.