Illinois Severe Flood Watch | Effective 09/18/2026 19:49
* 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...From 1 AM CDT Saturday through Saturday afternoon.
* 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