Active Weather Alerts
Small Craft Advisory
Issued: 8:12 AM Mar. 11, 2026 – National Weather Service
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CDT THURSDAY... * WHAT...Northwest winds to 30 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Winthrop Harbor to Northerly Island IL. * WHEN...Until 4 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. &&
River Flood Warning
Issued: 6:35 AM Mar. 11, 2026 – National Weather Service
...FLOOD WARNING IN EFFECT FROM THIS MORNING TO TOMORROW 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 morning to tomorrow morning. * IMPACTS...At 9.0 feet, Water begins to be diverted through Thorn Creek Diversion Tunnel. * ADDITIONAL DETAILS... - At 1:15 AM CDT Wednesday the stage was 4.4 feet. - Forecast...The river is expected to rise above flood stage late this morning to a crest of 9.9 feet this evening. It will then fall below flood stage just after midnight tonight. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood &&
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