As Chicago celebrates Independence Day, residents are faced with mixed weather conditions and concerns over air quality. According to the National Weather Service, there's a chance of showers and thunderstorms today, particularly before 4 pm, followed by clearing skies and a high near 90. Winds may gust as high as 20 mph, and the chance of precipitation stands at 40%.
Tonight, the city should see partly cloudy skies with a mild southeast wind. Looking ahead, Saturday promises mostly sunny skies with temperatures edging higher, reaching near 94 degrees. However, there is a slight 20 percent chance of showers and thunderstorms come Saturday night. A substantial rise in humidity levels is also expected this weekend, which, coupled with the sweltering temperatures, could push heat index values close to 100 degrees.
Concerns extend beyond the unsettled weather. The Illinois EPA has issued an Air Quality Alert, in effect until midnight. With the mercury climbing and humidity building, stagnant air is set to increase ozone pollution levels to a point that is deemed 'Unhealthy for Sensitive Groups.' This designation suggests that while the majority will not be affected, those with respiratory issues should take precautions. The details regarding the alert were reported by CBS News Chicago.
The later part of the weekend does not offer much reprieve. The best chance for showers and thunderstorms develops late Saturday night into Sunday, with heavy rain and potential flooding being main concerns. From a cooler lakeside Monday to possible few storms on Wednesday, the week rounds out with temperatures forecast in the mid-80s, which could feel cooler by the lake.
