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Grundy County IL Emergency Management Agency
Sunday August 17th, 2025 :: 04:20 a.m. CDT

Alert

Flash Flood Warning until 07:15AM

FFWLOT The National Weather Service in Chicago has issued a

* Flash Flood Warning for... Northern Iroquois County in east central Illinois... Northeastern Grundy County in northeastern Illinois... Kankakee County in northeastern Illinois... Southern Kendall County in northeastern Illinois... Southwestern Will County in northeastern Illinois...

* Until 715 AM CDT.

* At 420 AM CDT, Doppler radar indicated thunderstorms producing torrential rainfall across much of the warned area. Between 1 and 2 inches of rain have fallen. The expected rainfall rate is 2 to 3 inches in 1 hour. Additional rainfall amounts of 2 to 3 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding. SOURCE...Radar. IMPACT...Rapid-onset flooding of creeks, streams, drainage ditches, streets, underpasses, low-lying areas, and other poor drainage areas.

* Some locations that will experience flash flooding include... Kankakee, Bourbonnais, Bradley, Morris, Channahon, Minooka, Manteno, Braidwood, Wilmington, Coal City, Momence, Herscher, Clifton, Shorewood, Diamond, Elwood, Limestone and Gardner.

* AFFECTED AREAS: GRUNDY, IL ... IROQUOIS, IL ... KANKAKEE, IL ... KENDALL, IL ... WILL, IL

Instructions:

A Flash Flood Warning means rapid-onset flooding is imminent or may already be occurring. Persons along creeks, drainage ditches, and other waterways should take immediate precautions to protect life and property. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

Address/Location
Grundy County IL Emergency Management Agency
1320 Union St
Morris, IL 60450

Contact
Emergency: 9-1-1
Non-emergencies: 815-941-3212

Submit an anonymous web tip

Alert Details

Severity:
Severe - Significant threat to life or property
Urgency:
Immediate - Responsive action SHOULD be taken immediately
Certainty:
Likely (p > ~50%)
Category:
Meteorological (inc. flood)
Event:
Flash Flood Warning

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