Illinois Severe Flood Watch | Effective 09/19/2026 01:39

Headline: 
Flood Watch issued September 19 at 3:39AM CDT until September 19 at 1:00PM CDT by NWS Chicago IL
Event: 
Flood Watch
Urgency: 
Future
Effective: 
September 19, 2026 - 1:39am
Expires: 
September 19, 2026 - 9:45am
Description: 
* WHAT...Flash flooding caused by excessive rainfall continues to be 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...Until 1 PM CDT this afternoon. * IMPACTS...Creeks and streams may rise out of their banks. Roads and streets may be flooded. * ADDITIONAL DETAILS... - Showers and thunderstorms will produce heavy rain this morning which may cause localized flash flooding. Additional showers and thunderstorms may produce heavy rain and localized flash flooding tonight when another flood watch for flash flooding may be needed. - http://www.weather.gov/safety/flood
Instruction: 
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.
Area Description: 
Winnebago; Boone; McHenry; Ogle
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov