Headline:
Flash Flood Warning issued September 17 at 7:51AM CDT until September 17 at 11:00AM CDT by NWS Chicago IL
Event:
Flash Flood Warning
Urgency:
Immediate
Effective:
September 17, 2026 - 5:51am
Expires:
September 17, 2026 - 9:00am
Description:
At 751 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between 3
and 5 inches of rain have fallen. Additional rainfall amounts up to 1
inch are possible in the warned area. Flash flooding is already
occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
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...
Sandwich, Mendota, Amboy, Sheridan, Lake Holiday, Somonauk,
Earlville, Leland, Paw Paw, Sublette, Woodhaven Lakes, Millington,
Compton and West Brooklyn.
Instruction:
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.
Area Description:
De Kalb, IL; La Salle, IL; Lee, IL
Forcast Office:
NWS Chicago IL
Sender:
w-nws.webmaster@noaa.gov