Headline:
Flood Watch issued September 18 at 1:47PM CDT until September 19 at 1:00PM CDT by NWS Chicago IL
Event:
Flood Watch
Urgency:
Future
Effective:
September 18, 2026 - 11:47am
Expires:
September 18, 2026 - 9:15pm
Description:
* WHAT...Flash flooding caused by excessive rainfall is 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 morning.
* 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
produce widespread rainfall rates up to 2 inches per hour that
could lead to flash flooding.
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
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