Active Weather Alerts
River Flood Warning
Issued: 3:15 PM Jun. 18, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT FROM FRIDAY AFTERNOON TO LATE TUESDAY MORNING... * WHAT...Minor flooding is forecast. * WHERE...Iowa River at Marengo. * WHEN...From Friday afternoon to late Tuesday morning. * IMPACTS...At 16.0 feet, Water affects agricultural land along the river. Water is several feet deep in places. * ADDITIONAL DETAILS... - At 10:00 AM CDT Thursday the stage was 13.5 feet and rising. - Forecast...The river is expected to rise above flood stage early tomorrow afternoon to a crest of 15.8 feet Sunday morning. It will then fall below flood stage early Tuesday morning. - Flood stage is 15.0 feet. &&
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