This event is no longer active — it's kept here as a record. Recovery may still be underway; the guidance below applies.
Part of: Shelby County Area Flooding — August 2026 →
Flood Warning issued August 14 at 8:16AM CDT until August 15 at 1:00PM CDT by NWS Chicago IL
This is a severe-significance flood warning event affecting Cook, IL, tracked from official feeds (NOAA / National Weather Service). We update this page as the situation develops.
- Type
- Flood Warning
- Extent
- ≈ 14,860 acres
- Began
- To end
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Affected area map
The shaded area is the affected-area perimeter reported for this event by NOAA / National Weather Service (Cook, IL), colored by hazard type. Pan and zoom to explore the map; when more than one observation exists, use the slider below to step through how the reported area changed.
Interactive affected-area map
Cook, IL · ≈ 23 sq mi reported extent · Enable JavaScript to explore the map.
Shown as reported by our sources — not an official product. For current advisories and the authoritative map, see NOAA / National Weather Service ↗.
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Latest updates
Official updates and news coverage for this event, newest first — National Weather Service products, local storm reports, incident updates and press headlines. Official items are verbatim government text; news headlines link out to the original outlet.
- Forecast discussion NWS LOT
Area Forecast Discussion
Significant flash flooding is possible tonight, particularly in areas south of Interstate 80.
Show full text Hide full text
000 FXUS63 KLOT 141830 AFDLOT
Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 130 PM CDT Fri Aug 14 2026
.KEY MESSAGES...
- There is a threat for significant flash flooding tonight primarily near and south of Interstate 80.
- There is a trend toward less coverage of showers and storms Saturday night into Sunday morning, but no guarantees yet.
- A brief break in the stormy pattern is expected Monday into Tuesday before another series of storm systems move through the region during the middle of the week.
&&
.DISCUSSION... Issued at 130 PM CDT Fri Aug 14 2026
...THREAT FOR SIGNIFICANT FLASH FLOODING TONIGHT...
Early afternoon surface charts depict an elongated stationary front extending from central Virginia along the Ohio River northwestward toward Kansas City, Missouri. A series of mid- level perturbations are riding along and north as the front as evident by festering areas of showers and thunderstorms from Omaha, Nebraska to Indianapolis, Indiana. The western-most perturbation (near Omaha) is the strongest in the region, as demonstrated by broad anticyclonic upper-level venting depicted in mid-level water vapor imagery as well as a clear cyclonic…
- News ABC7 Chicago
Chicago weather: Cook County Flood Warning, NIPSCO power outages after Illinois, northwest Indiana tornadoes cause storm damage
- Bulletin NWS Chicago IL
Flood Warning issued
Cook, IL
- Storm report NWS LOT storm report
FLASH FLOOD — 3 SW Woodworth, IL
IL Route 49 was reportedly flooded near E 1000N Rd north of Cissna Park.
Show 1 earlier update
- Hometown Stations News
Heavy rain and quarter-size hail hit Lima as storms move through region
Updates are captured automatically from official and news sources, and may lag the live source. For the very latest, see NOAA / National Weather Service ↗.