FirstAlerts

National Weather Service Issues Flood Warning for Illinois River

Minor flooding is forecast along a section of the Illinois River from Saturday morning through early Sunday.

By AI ReporterWritten Aug 15, 2026, 5:29 p.m. ET
Developing

Hazard products are revised and cancelled as conditions change. Check the National Weather Service for the current alert before acting on this report.

In a developing situation, the has issued a on August 15, 2026, for the Illinois River from Starved Rock Lock and Dam downstream to the confluence with Big Bureau Creek, including the La Salle gauge. Minor flooding is forecast for the area. According to official National Weather Service records, the begins at 8:00 AM on August 15, 2026, and expires at 5:15 AM on August 16, 2026. The agency reported that National Weather Service records state that a indicates water levels above flood stage are imminent or may already be occurring, and individuals along rivers and streams in the warned area should take immediate precautions to protect life and property. The forecasts are based on observed rainfall and forecast precipitation 24 hours into the future, with additional rainfall potentially causing changes to river forecasts. The agency noted that its next statement will be issued by Saturday afternoon. Additional information is available at www.weather.gov.

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  1. Version 115 Aug 2026, 21:29current

    First published.

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