Severe Flood ● Closed
Flood Watch issued September 20 at 10:17AM CDT until September 20 at 1:00PM CDT by NWS Chicago IL, United States of America
Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Illinois, including the following areas,
Central Cook, De Kalb, DuPage, Eastern Will, Grundy, Kane,
Kankakee, Kendall, La Salle, Lee, Northern Cook, Northern Will,
Ogle, Southern Cook and Southern Will and northwest Indiana,
including the following areas, Lake IN and Porter.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Underpasses may be
flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- The threat for widespread heavy rainfall is ending. However,
continued moderate to isolated heavy rainfall may lead to a
continued localized flood threat.
- http://www.weather.gov/safety/flood
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Ogle; Lee; De Kalb; Kane; DuPage; La Salle; Kendall; Grundy; Kankakee; Northern Cook; Central Cook; Southern Cook; Northern Will; Southern Will; Eastern Wi |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Future |
| Cap Certainty | Possible |
| Cap Expires | 2026-09-20T13:00:00-05:00 |
Official source
Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.
This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.
Severity as published by WMO Alert Hub (national weather services).
View original reportThis event as JSON · API and licence
Source updated 29 days ago (Sep 20, 2026 16:12 UTC) · we last heard from WMO Alert Hub (national weather services) 24 seconds ago
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About this location
The agency did not publish coordinates for this warning. The pin is the centre of the country, not the location of the event — read the area name, not the map, for where it applies.
Area as the agency stated it: Ogle; Lee; De Kalb; Kane; DuPage; La Salle; Kendall; Grundy; Kankakee; Northern Cook; Central Cook; Southern Cook; Northern Will; Southern Will; Eastern Wi
Official authorities in United States
If you are there, these are the bodies whose instructions apply. This site is not an emergency service and does not issue warnings.
More for United States →What to do
Follow the instructions issued by WMO Alert Hub (national weather services) and your local emergency services. The guidance below is background.
Flood preparation, evacuation decisions, and the dangers of driving or walking through floodwater.
Open Flood Safety Guide →Earlier flood events in United States
Severe and extreme events of the same kind, before this one. Listed for scale, not because they are connected to it.
Nearby & related events
Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.