Active Weather Alerts
Flash Flood Warning
Issued: 9:06 PM Aug. 12, 2025 – National Weather Service
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING FOR SOUTHEASTERN COOK AND CENTRAL WILL COUNTIES... At 405 PM CDT, Doppler radar and automated rain gauges indicated generally decreasing rainfall rates over the last half hour across the area. Multiple public reports of roadway flooding have been received due to earlier rainfall. Additional slow-moving thunderstorms are developing and moving into the area with rainfall rates up to 2 inches per hour. Additional rainfall may worsen flooding or cause water to stop receding. Up to 3.5 inches of rain have fallen so far. HAZARD...Flash flooding. SOURCE...Trained spotters. IMPACT...Rapid-onset flooding of creeks, streams, drainage ditches, streets, underpasses, low-lying areas, and other poor drainage areas. Some locations that will experience flash flooding include... Chicago, Hammond, Orland Park, Tinley Park, Oak Lawn, Calumet City, Chicago Heights, Roseland, Englewood, South Shore, Lansing, Oak Forest, Harvey, New Lenox, Homer Glen, Blue Island, Munster, Dolton, Park Forest and Homewood. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Warning means rapid-onset flooding is imminent or may already be occurring. Persons along creeks, drainage ditches, and other waterways should take immediate precautions to protect life and property. && FLASH FLOOD...OBSERVED; EXPECTED RAINFALL RATE...2 INCHES IN 1 HOUR
Flood Advisory
Issued: 8:59 PM Aug. 12, 2025 – National Weather Service
...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 645 PM CDT THIS EVENING... * WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of northeast Illinois, including the following county, Cook. * WHEN...Until 645 PM CDT. * IMPACTS...Flooding may occur in poor drainage and urban areas. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 357 PM CDT, Doppler radar indicated heavy rain due to thunderstorms with rates up to 3 inches per hour. Heaviest rainfall was located across northwestern and northern Chicago. Up to 2 inches of rain has fallen near Elmwood Park and Rogers Park area of Chicago. - Some locations that will experience flooding include... Chicago, Cicero, Evanston, Skokie, Des Plaines, Berwyn, Oak Park, Glenview, Ohare Airport, Park Ridge, Niles, Austin, Irving Park, South Lawndale, West Town, West Ridge, Lake View, Lincoln Park, Midway Airport and Bridgeport. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters. &&
Flood Advisory
Issued: 8:53 PM Aug. 12, 2025 – National Weather Service
...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 530 PM CDT THIS AFTERNOON... ...PORTIONS OF THIS ADVISORY REPLACED WITH A FLASH FLOOD WARNING... * WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of northeast Illinois, including the following counties, Cook and Will. * WHEN...Until 530 PM CDT. * IMPACTS...Flooding may occur in poor drainage and urban areas. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 351 PM CDT, Doppler radar and automated rain gauges indicated heavy rainfall continuing across the area. Most of the advisory area has been replaced with a Flash Flood Warning. - Some locations that will experience flooding include... Chicago, Hammond, Orland Park, Tinley Park, Oak Lawn, Calumet City, Woodridge, Chicago Heights, Roseland, Chicago Lawn, Englewood, South Shore, Burbank, Lansing, Oak Forest, Harvey, New Lenox, Homer Glen, Blue Island and Dolton. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters. &&
Flood Watch
Issued: 4:34 PM Aug. 12, 2025 – National Weather Service
...FLOOD WATCH IN EFFECT THROUGH THIS EVENING... * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of northeast Illinois, including the following areas, Central Cook, DuPage, Eastern Will, Northern Cook, Northern Will, Southern Cook and Southern Will and northwest Indiana, including the following area, Lake IN. * WHEN...Through this evening. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Underpasses may be flooded. Roads and streets may be flooded. * ADDITIONAL DETAILS... - Showers and thunderstorms are possible this afternoon and evening. Atmospheric conditions are favorable for rainfall rates up to 1-2 inches per hour. In addition to increased runoff potential due to urban land cover in the Chicago Metropolitan Area, near surface soil moisture in some areas is elevated due to recent rainfall. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch for flash flooding means rapid-onset flooding is possible, but not yet certain, based upon the latest forecasts. Flash flooding is a dangerous situation. Persons with interests along area rivers, creeks, and other waterways should monitor the latest forecasts and be prepared to take action should flooding develop. &&
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