Data source: National Weather Service (NWS) Last verified: July 17, 2026

Flooding

Flood Warning (WARNING) - expires July 17, 2026 at 1:30 PM EDT

Areas affected: Cass, IL; Fulton, IL; Mason, IL

Flood Warning issued July 16 at 8:29PM CDT until July 18 at 7:00PM CDT by NWS Lincoln IL

...The Flood Warning continues for the following rivers in Illinois...

Illinois River at Beardstown affecting Brown, Morgan, Schuyler and Cass Counties.

Illinois River at Havana affecting Cass, Fulton and Mason Counties.

.The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. River levels will continue to slowly fall.

• WHAT...Minor flooding is occurring and minor flooding is forecast.

• WHERE...Illinois River at Havana.

• WHEN...Until Saturday evening.

• ADDITIONAL DETAILS...

• At 7:45 PM CDT Thursday the stage was 14.9 feet.

• Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM CDT Thursday was 15.1 feet.

• Forecast...The river is expected to fall below flood stage early Saturday afternoon and continue falling to 11.4 feet Thursday, July 23.

• Flood stage is 14.0 feet.

What to do: Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation.

Additional information is available at www.weather.gov.

Source: NWS Lincoln IL

Flood Warning (WARNING) - expires July 17, 2026 at 1:30 PM EDT

Areas affected: Brown, IL; Cass, IL; Morgan, IL; Schuyler, IL

Flood Warning issued July 16 at 8:29PM CDT until July 19 at 1:00PM CDT by NWS Lincoln IL

...The Flood Warning continues for the following rivers in Illinois...

Illinois River at Beardstown affecting Brown, Morgan, Schuyler and Cass Counties.

Illinois River at Havana affecting Cass, Fulton and Mason Counties.

.The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. River levels will continue to slowly fall.

• WHAT...Minor flooding is occurring and minor flooding is forecast.

• WHERE...Illinois River at Beardstown.

• WHEN...Until early Sunday afternoon.

• ADDITIONAL DETAILS...

• At 7:45 PM CDT Thursday the stage was 15.2 feet.

• Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM CDT Thursday was 15.5 feet.

• Forecast...The river is expected to fall below flood stage Sunday morning and continue falling to 11.7 feet Thursday, July 23.

• Flood stage is 14.0 feet.

What to do: Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation.

Additional information is available at www.weather.gov.

Source: NWS Lincoln IL

Air Quality

Air Quality Alert (ADVISORY) - expires July 18, 2026 at 1:00 AM EDT

Areas affected: Jo Daviess; Stephenson

Air Quality Alert issued July 16 at 1:54PM CDT by NWS Quad Cities IA IL

The Illinois Environmental Protection Agency has issued a Red Forecast Air Pollution Action Day for Friday July 17th for the AirNow AQI forecast sectors of Rockford and all 6 Chicago area forecast sectors. This is in addition to downgrade of the ongoing action day to a Purple Forecast Air Pollution Action Day in effect today.

These Purple and Red Forecast Air Pollution Action Days are declared due to a forecast of Very Unhealthy-Purple category particulates on Thursday July 16th and a forecast of Unhealthy-Red category particulates on Friday July 17th.

Northern IL is on the edge of a thick plume of surface smoke blanketing the Great Lakes and Northeast U.S. While some models do suggest minor decreases in smoke/PM2.5 levels are possible today, they also suggest that the smoke wont significantly decrease until between mid-morning and mid-afternoon Friday. Forecasts for 24-hour AQI will remain in poor categories Friday even though condition may eventually improve. With this in mind, those with air quality concerns or outdoor plans are encouraged to check current NowCast readings or sign up for EnviroFlash alerts on AirNow.gov to aid in both identifying periods of poor AQI and periods of improving AQI.

AQI Category Guidance

Unhealthy - Everyone should reduce prolonged activities or heavy exertion outdoors. Active children, older adults, and people with pulmonary or respiratory disease such as asthma should avoid prolonged activities or heavy exertion outdoors.

Very Unhealthy - Sensitive groups: Avoid all physical activity outdoors. Reschedule to a time when air quality is better or move activities indoors. Everyone else: Avoid long or intense activities. Consider rescheduling or moving activities indoors. Note: If you don't have an air conditioner, staying inside with the windows closed may be dangerous in extremely hot weather.

Source: NWS Quad Cities IA IL

Air Quality Alert (ADVISORY) - expires July 18, 2026 at 1:00 AM EDT

Areas affected: Winnebago; Boone; McHenry; Lake; Ogle; Lee; De Kalb; Kane; DuPage; La Salle; Kendall; Grundy; Northern Cook; Central Cook; Southern Cook; Northern Will; Southern Will; Eastern Will

Air Quality Alert issued July 16 at 1:28PM CDT by NWS Chicago IL

The Illinois Environmental Protection Agency has issued a Red Forecast Air Pollution Action Day for Friday July 17th for the AirNow AQI forecast sectors of Rockford and all 6 Chicago area forecast sectors. This is in addition to downgrade of the ongoing action day to a Purple Forecast Air Pollution Action Day in effect today.

These Purple and Red Forecast Air Pollution Action Days are declared due to a forecast of Very Unhealthy-Purple category particulates on Thursday July 16th and a forecast of Unhealthy-Red category particulates on Friday July 17th.

Northern IL is on the edge of a thick plume of surface smoke blanketing the Great Lakes and Northeast U.S. While some models do suggest minor decreases in smoke/PM2.5 levels are possible today, they also suggest that the smoke wont significantly decrease until between mid-morning and mid-afternoon Friday. Forecasts for 24-hour AQI will remain in poor categories Friday even though condition may eventually improve. With this in mind, those with air quality concerns or outdoor plans are encouraged to check current NowCast readings or sign up for EnviroFlash alerts on AirNow.gov to aid in both identifying periods of poor AQI and periods of improving AQI.

AQI Category Guidance

Unhealthy - Everyone should reduce prolonged activities or heavy exertion outdoors. Active children, older adults, and people with pulmonary or respiratory disease such as asthma should avoid prolonged activities or heavy exertion outdoors.

Very Unhealthy - Sensitive groups: Avoid all physical activity outdoors. Reschedule to a time when air quality is better or move activities indoors. Everyone else: Avoid long or intense activities. Consider rescheduling or moving activities indoors. Note: If you don't have an air conditioner, staying inside with the windows closed may be dangerous in extremely hot weather.

Source: NWS Chicago IL

Source

Alert data provided by the National Weather Service (NWS). This page shows active alerts only and is refreshed daily. For real-time updates, visit weather.gov.