Severe Flood ● Closed
Flood Watch issued September 20 at 9:21PM CDT until September 23 at 10:00AM 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.
...The Flood Watch continues for the following rivers in Illinois...
Illinois River at La Salle affecting La Salle, Putnam and Bureau
zones.
* WHAT...Flooding is possible.
* WHERE...Illinois River from Starved Rock Lock and Dam downstream to
confluence with Big Bureau Creek, including the La Salle gauge.
* WHEN...From Monday morning to Wednesday morning.
* ADDITIONAL DETAILS...
- At 8:45 PM CDT Sunday the stage was 16.0 feet.
- Forecast...Rises on the river are possible the next few days. The
river may reach flood stage.
- Flood stage is 20.0 feet.
- http://www.weather.gov/safety/flood
Measurements
| Coordinates | 41.3167, -89.2317 |
|---|---|
| Region | Bureau; Putnam; La Salle |
| Location Precision | polygon |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Future |
| Cap Certainty | Possible |
| Cap Expires | 2026-09-21T15:30:00-05:00 |
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 28 days ago (Sep 21, 2026 02:22 UTC) · we last heard from WMO Alert Hub (national weather services) 1 minute ago
On a slow connection? Low-bandwidth version — no map, no scripts, under 14 KB.
Satellite view, before and after
The latest clear Sentinel-2 pass before this event and the earliest one after it.
4 Sep 2026, 16 days before this event. 24.1% cloud across the tile.
4 Oct 2026, 14 days after this event. 0% cloud across the tile.
The white ring marks where the event was reported.
Each image is a preview of a whole Sentinel-2 tile — an area of roughly 110 by 110 km, where one pixel is about 320 metres — not a close-up of the event, which may be a small part of it. "Clear" means under 30% cloud across the entire tile, so the exact place that matters can still be hidden. These are pictures for context, not an assessment of damage.
Contains modified Copernicus Sentinel data 2026, found through the Earth Search catalogue (Element 84) and served from the AWS Open Data Sentinel-2 archive.
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.