Active Weather Alerts
Flood Watch
Issued: 6:47 PM Sep. 18, 2026 – National Weather Service
...FLOOD WATCH IN EFFECT FROM 1 AM CDT SATURDAY THROUGH SATURDAY MORNING... * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of north central and northeast Illinois, including the following counties, in north central Illinois, Boone, Ogle and Winnebago. In northeast Illinois, McHenry. * WHEN...From 1 AM CDT Saturday through Saturday morning. * IMPACTS...Creeks and streams may rise out of their banks. Roads and streets may be flooded. * ADDITIONAL DETAILS... - Showers and thunderstorms overnight into Saturday morning may produce widespread rainfall rates up to 2 inches per hour that could lead to flash flooding. Additional thunderstorms Saturday evening into early Sunday morning have the potential to produce torrential rainfall that results in flash flooding, though the exact placement of this rainfall remains unclear. A second Flood Watch for flash flooding may be needed during this period. - 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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