Illinois Flood Warning | Effective 04/20/2026 14:39

Headline: 
Flood Warning issued April 20 at 4:39PM CDT until April 29 at 1:00PM CDT by NWS Chicago IL
Event: 
Flood Warning
Urgency: 
Expected
Effective: 
April 20, 2026 - 2:39pm
Expires: 
April 29, 2026 - 11:00am
Description: 
* WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of northeast Illinois, including the following counties, Lake IL and McHenry. * WHEN...Until further notice. * IMPACTS...Numerous roads, yards, structures, and park land are expected to flood along the Fox River Chain of Lakes. * ADDITIONAL DETAILS... - At 438 PM CDT, River gauges along the Fox River Chain of Lakes indicated water levels continuing to rise slowly. Water levels exceeded moderate flood stage earlier today. The latest forecast from the Illinois Department of Natural Resources indicates that water levels may near major flood stage by the middle of this week. - Water levels are expected to remain above flood stage at least through the middle of next week, assuming no additional rainfall occurs. Impacts from this flood may be similar to those experienced in May of 1973, October of 1986, or June of 2008. - Some locations that will experience flooding include areas along the Fox River Chain of Lakes, including Nippersink Lake, Fox Lake, Pistakee Lake, Petite Lake, Lake Marie, Channel Lake, and Lake Catherine. - http://www.weather.gov/safety/flood
Instruction: 
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Area Description: 
Lake, IL; McHenry, IL
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov