Active Weather Alerts
River Flood Warning
Issued: 11:06 PM Jun. 17, 2026 – National Weather Service
...FLOOD WARNING IN EFFECT FROM THIS EVENING TO EARLY FRIDAY MORNING... * WHAT...Minor flooding is forecast. * WHERE...Thorn Creek from Near Glenwood downstream to confluence with Little Calumet River, including the Thornton gauge. * WHEN...From this evening to early Friday morning. * IMPACTS...At 9.0 feet, Water begins to be diverted through Thorn Creek Diversion Tunnel. At 11.0 feet, 187th Street threatened in Glenwood. * ADDITIONAL DETAILS... - At 5:45 PM CDT Wednesday the stage was 6.7 feet and rising rapidly. - Forecast...The river is expected to crest near 10.5 feet just after midnight tonight. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood &&
Flash Flood Warning
Issued: 10:49 PM Jun. 17, 2026 – National Weather Service
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING FOR SOUTHEASTERN COOK AND NORTHERN LAKE IN COUNTIES... At 549 PM CDT, Doppler radar indicated that rain had ended across the warned area. According to radar and automated gauges, up to 2 inches of rain fell. Recent traffic reports indicated lingering standing water on some roadways. HAZARD...Flash flooding. SOURCE...Radar and automated gauges. 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... Hammond, Gary, Tinley Park, Calumet City, Portage, Merrillville, Chicago Heights, East Chicago, Schererville, Hobart, Lansing, Oak Forest, Harvey, Highland, Munster, Dolton, Park Forest, Homewood, Matteson and Frankfort. 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...RADAR AND GAUGE INDICATED
River Flood Warning
Issued: 9:47 PM Jun. 17, 2026 – National Weather Service
...FLOOD WARNING IN EFFECT FROM THIS AFTERNOON TO TOMORROW EVENING... * WHAT...Minor flooding is forecast. * WHERE...Little Calumet River from IN-912 in Hammond downstream to confluence with Thorn Creek in South Holland, including the Munster (Hohman Avenue) gauge. * WHEN...From this afternoon to tomorrow evening. * IMPACTS...At 12.5 feet, Most areas outside of the levee-protected area are inundated in Hammond and Munster. * ADDITIONAL DETAILS... - At 4:00 PM CDT Wednesday the stage was 10.3 feet. - Forecast...The river is expected to crest of near 13 feet late this evening. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood &&
Beach Hazard Statement
Issued: 8:22 PM Jun. 17, 2026 – National Weather Service
...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH LATE TONIGHT... * WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 5 to 8 ft expected. * WHERE...Lake IL, Northern Cook and Central Cook Counties. * WHEN...Through late tonight. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures. &&
Small Craft Advisory
Issued: 8:16 PM Jun. 17, 2026 – National Weather Service
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 AM CDT THURSDAY... ...GALE WARNING IS CANCELLED... * WHAT...West winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Illinois and Indiana nearshore from Winthrop Harbor IL to Michigan City IN. * WHEN...Until 9 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. &&
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