Illinois Minor Flood Advisory | Effective 09/20/2026 02:30
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Boone County in north central Illinois...
Winnebago County in north central Illinois...
McHenry County in northeastern Illinois...
* WHEN...Until 800 AM CDT.
* 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...
- At 428 AM CDT, Doppler radar indicated heavy rain due to