Severe · Flood WatchActive alert
Flood Watch issued September 18 at 9:49PM CDT until September 19 at
Affecting Lake; Lee; De Kalb; Kane; DuPage; Kendall; Northern Cook; Central Cook; Southern Cook; Northern Will; Lake; Porter
In effect until: Sep 19, 2026, 11:00 AM
Lake; Lee; De Kalb; Kane; DuPage; Kendall; Northern Cook; Central Cook; Southern Cook; Northern Will; Lake; Porter
Possible impact zone; conditions develop through 11:00 AM.
Avoid flooded areas. Move to higher ground if water is rising near you.
Read the original bulletin (official text)
* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Central Cook, De Kalb, DuPage, Kane, Kendall, Lake IL, Lee, Northern Cook, Northern Will and Southern Cook and northwest Indiana, including the following areas, Lake IN and Porter. * WHEN...From 4 AM CDT Saturday through Saturday afternoon. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Roads and streets may be flooded. * ADDITIONAL DETAILS... - Showers and thunderstorms late tonight through Saturday morning may produce widespread rainfall rates up to 2 inches per hour that could lead to flash flooding, particularly over urban areas. 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
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™