Headline:
Flood Advisory issued September 20 at 12:16AM CDT until September 20 at 3:15AM CDT by NWS Chicago IL
Event:
Flood Advisory
Urgency:
Expected
Effective:
September 19, 2026 - 10:16pm
Expires:
September 20, 2026 - 1:15am
Description:
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Southern De Kalb County in north central Illinois...
Northern La Salle County in north central Illinois...
Lee County in north central Illinois...
* WHEN...Until 315 AM CDT.
* IMPACTS...Creeks and streams may rise out of their banks. Roads and
streets may be flooded.
* ADDITIONAL DETAILS...
- At 1213 AM CDT, Doppler radar indicated heavy rain due to
training thunderstorms. Minor flooding is ongoing or expected to
begin shortly in the advisory area. Up to 2 inches of rain have
fallen.
- Additional rainfall amounts in excess of 1 to 3 inches are
possible over the area overnight which may result in additional
flooding.
- Some locations that will experience flooding include...
Sandwich, Mendota, Amboy, Sheridan, Shabbona, Lake Holiday,
Hinckley, Somonauk, Earlville, Waterman, Serena, Leland, Paw Paw,
Sublette, Woodhaven Lakes, Millington, Lee, Compton, Troy Grove,
Nelson, West Brooklyn, Harmon, Triumph, Prairie Center and Lee
Center.
- http://www.weather.gov/safety/flood
Instruction:
A Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Area Description:
De Kalb, IL; La Salle, IL; Lee, IL
Forcast Office:
NWS Chicago IL
Sender:
w-nws.webmaster@noaa.gov