Areal Flood Watch for McHenry Co., IL until 4:00 AM CDT 8/19

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WGUS63 KLOT 190224
FFALOT

Flood Watch
National Weather Service Chicago IL
924 PM CDT Mon Aug 18 2025


/O.CON.KLOT.FA.A.0009.000000T0000Z-250819T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La
Salle-Kendall-Grundy-Kankakee-Northern Cook-Central Cook-Southern
Cook-Northern Will-Southern Will-Eastern Will-Lake IN-Porter-
Including the cities of Wheaton, Yorkville, Streator, Waukegan,
Mokena, Chesterton, DeKalb, Belvidere, Crystal Lake, Peotone,
Oregon, Woodstock, Plano, Bradley, Calumet City, Bolingbrook,
Aurora, McHenry, Evanston, Byron, Cicero, Channahon, Oswego, Oak
Lawn, Oak Forest, La Grange, Rockford, Gurnee, Oak Park,
Bourbonnais, Lemont, Park Forest, Morris, Hammond, Merrillville,
Northbrook, Rochelle, Valparaiso, Marseilles, Orland Park,
Buffalo Grove, Schaumburg, Manhattan, Ottawa, Kankakee, Downers
Grove, Palatine, Naperville, Elgin, Mundelein, Wilmington,
Sycamore, Crete, Beecher, Gary, Lombard, Algonquin, Joliet,
Chicago, Portage, Dixon, Carol Stream, Mendota, Minooka, Des
Plaines, Coal City, Plainfield, and La Salle
924 PM CDT Mon Aug 18 2025

...FLOOD WATCH REMAINS IN EFFECT UNTIL 4 AM CDT TUESDAY...

* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.

* WHERE...Portions of Illinois, including the following areas,
Boone, Central Cook, De Kalb, DuPage, Eastern Will, Grundy, Kane,
Kankakee, Kendall, La Salle, Lake IL, Lee, McHenry, Northern Cook,
Northern Will, Ogle, Southern Cook, Southern Will and Winnebago
and northwest Indiana, including the following areas, Lake IN and
Porter.

* WHEN...Until 4 AM CDT Tuesday.

* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Roads and streets may
be flooded. Area creeks and streams are already elevated,
increasing the risk of flooding due to additional rainfall.
Exte...

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