National Weather Service United States Department of Commerce

Clusters of showers and some storms will gradually develop and push northward this afternoon. Severe weather is not expected, but gusty winds and brief downpours will be possible with the strongest storms. Activity should diminish through the evening.
There is a threat for scattered strong to severe thunderstorms capable of producing corridors of wind damage on Wednesday afternoon and early evening. In addition, torrential downpours may cause localized flooding. Stay tuned for the latest updates!
Periodic thunderstorm chances exist through Thursday and again over the weekend, along with typical summertime heat and humidity. Strengthening winds on Thursday will result in building waves and dangerous swim conditions on the lake into Friday.
An Air Quality Alert is now in effect through Wednesday evening for the Chicago metro area in Illinois and in northwest Indiana due to unhealthy ozone levels and some lingering effects of Canadian wildfire smoke. Air quality is expected to be at unhealthy levels for sensitive groups. Consider limiting prolonged outdoor activity. For additional air quality information: Illinois: https://www.airnow.gov/state/?name=illinois Indiana: www.SmogWatch.IN.gov and https://www.airnow.gov/state/?name=indiana