Wednesday, September 16, 2026

Air Pollution Alert

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THURSDAY NIGHT: Clouds fill back in. Seasonable temperatures. Light northeast winds. Low: 59.   

Friday will feature similar conditions to those observed on Thursday, with clouds and mixed hazy sunshine at times. 

A  slow moving surface high to the north will encourage a weak northeasterly flow to bring more wildfire smoke to the surface. The “Air Quality Alert” has been extended until midnight Friday night and it may be extended into part of the weekend if current trends continue to hold. 




Wildfire smoke is expected to continue to have an impact on particulate levels with daily 24-hour AQI (Air Quality Index) at “Unhealthy for sensitive groups” or higher. 

Friday Temperatures

High temperatures Friday will look very similar Thursday with low to middle 70s expected inland and middle 60s closer to the lake as a pesky northeast wind will continue to deliver cooling breezes for areas in close proximity to Lake Michigan. 


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Next Few Hours


Looking Ahead

Chicago’s rain chances

The weekend opens quiet under partly sunny skies but the next chance for showers arrives Saturday night and again at times on Sunday afternoon otherwise it looks dry. 

Forecast next 7 days: Tracking weather systems moving across the country 

The heaviest precipitation is likely to fall across the southern-tier states as a moist, southerly flow brings  periodic thunderstorms. 

Forecast rainfall next 7 days

Sub-par rains are expected across the Chicago area with the heaviest amounts falling well south across portions of southern Kansas, Missouri, southern Illinois and the Ohio Valley.    

Chicago forecast highs and the departure from normal

Expect a brief spike on Sunday in an otherwise slightly below normal temperature regime.  

Upper level weather pattern next 10 days

Persistent trough/northwesterly flow forced by a strong Pacific Northwest ridge will continue to deliver cooler/dry air across the Midwest and Great Lakes into next week, but also more smoke from Canadian Wildfires. 

Forecast average temperature anomaly in 5- day intervals

Forecast temperature anomaly overall through June 13 shows a below normal temperature regime continuing across the Midwest and southern Plains while early season heat dominates the Pacific Northwest

Forecast June 14 through 18 

A shift in the jet stream allows some of the western heat to shift east resulting in above normal temperatures from the Rockies to the Northeast.


Climate and Environment news: WGN Weather Center blog

Conclusion

The weather forecast for the next few days indicates a mix of clouds and sunshine, with a chance of showers on Saturday night and Sunday afternoon. The air quality alert has been extended until midnight Friday night due to the presence of wildfire smoke. The temperature is expected to be slightly below normal

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