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Home Return to list Areal Flood Watch 0011 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-08-09 17:03:57
718
WGUS63 KLOT 092203
FFALOT
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
503 PM CDT Sun Aug 9 2026
ILZ005-006-011>013-020-021-023-103>108-INZ001-002-010-011-100615-
/O.NEW.KLOT.FA.A.0011.260810T0200Z-260810T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McHenry-Lake IL-De Kalb-Kane-DuPage-Kendall-Grundy-Kankakee-
Northern Cook-Central Cook-Southern Cook-Northern Will-Southern
Will-Eastern Will-Lake IN-Porter-Newton-Jasper-
Including the cities of Park Forest, Aurora, Crystal Lake,
Schaumburg, Oak Forest, Joliet, Merrillville, Kankakee, Chesterton,
Algonquin, La Grange, Chicago, Manhattan, Lemont, Buffalo Grove,
Oswego, DeKalb, Palatine, Hammond, Cicero, Minooka, Downers Grove,
Channahon, Sycamore, Portage, DeMotte, Yorkville, Morris, Wilmington,
Bradley, Beecher, Gurnee, Morocco, Oak Lawn, Calumet City,
Bourbonnais, Plano, Bolingbrook, Elgin, Crete, Waukegan, Rensselaer,
Evanston, Orland Park, Coal City, Mokena, Naperville, Carol Stream,
Oak Park, Lombard, Peotone, Woodstock, Des Plaines, Gary, Northbrook,
Plainfield, McHenry, Roselawn, Wheaton, Mundelein, Valparaiso, and
Kentland
503 PM CDT Sun Aug 9 2026
...FLOOD WATCH IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH EARLY
MONDAY MORNING...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of Illinois, including the following areas,
Central Cook, De Kalb, DuPage, Eastern Will, Grundy, Kane,
Kankakee, Kendall, Lake IL, McHenry, Northern Cook, Northern Will,
Southern Cook and Southern Will and northwest Indiana, including
the following areas, Jasper, Lake IN, Newton and Porter.
* WHEN...From 9 PM CDT this evening through early Monday morning.
* 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.
* ADDITIONAL DETAILS...
- The potential exists for repeated rounds of showers and
thunderstorms developing along a stalled surface front. Localized
rainfall rates may exceed 2 inches per hour over portions of
northeast Illinois and northwest Indiana late this evening
through tonight. Portions of the watch area received 1 to 3
inches of rainfall earlier today and will be more susceptible to
flooding with any additional heavy rainfall.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Watch for flash flooding means rapid-onset flooding is
possible, but not yet certain, based upon the latest forecasts. Flash
flooding is a dangerous situation. Persons with interests along area
rivers, creeks, and other waterways should monitor the latest
forecasts and be prepared to take action should flooding develop.
&&
$$
Petr
Action: Continued Issued At: 2026-08-09 21:03:05
346
WGUS63 KLOT 100202
FFALOT
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
902 PM CDT Sun Aug 9 2026
ILZ003-004-008-010-019-032-033-039-INZ019-101200-
/O.EXA.KLOT.FA.A.0011.000000T0000Z-260810T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-Ogle-Lee-La Salle-Livingston-Iroquois-Ford-Benton-
Including the cities of Paxton, Pontiac, Dixon, Rockford, Rochelle,
Gilman, Streator, Mendota, Byron, Marseilles, Watseka, Belvidere,
Dwight, Ottawa, Fairbury, Fowler, La Salle, Gibson City, Oxford, and
Oregon
902 PM CDT Sun Aug 9 2026 /1002 PM EDT Sun Aug 9 2026/
...FLOOD WATCH IN EFFECT UNTIL 7 AM CDT /8 AM EDT/ MONDAY...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of Illinois, including the following counties,
Boone, Ford, Iroquois, La Salle, Lee, Livingston, Ogle and
Winnebago and northwest Indiana, including the following county,
Benton.
* WHEN...Until 7 AM CDT /8 AM EDT/ Monday.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Roads and streets may
be flooded.
* ADDITIONAL DETAILS...
- Showers and thunderstorms are developing along a stalled surface
front. Atmospheric conditions are favorable for heavy rainfall
with localized rainfall rates exceeding 2 inches per hour late
this evening through the overnight. Slow storm motion and the
potential for multiple rounds of rainfall will increase the
threat for flooding in some areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Watch for flash flooding means rapid-onset flooding is
possible, but not yet certain, based upon the latest forecasts. Flash
flooding is a dangerous situation. Persons with interests along area
rivers, creeks, and other waterways should monitor the latest
forecasts and be prepared to take action should flooding develop.
&&
$$
ILZ005-006-011>013-020-021-023-103>108-INZ001-002-010-011-101200-
/O.CON.KLOT.FA.A.0011.000000T0000Z-260810T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McHenry-Lake IL-De Kalb-Kane-DuPage-Kendall-Grundy-Kankakee-
Northern Cook-Central Cook-Southern Cook-Northern Will-Southern
Will-Eastern Will-Lake IN-Porter-Newton-Jasper-
Including the cities of Wheaton, Mundelein, Des Plaines, Northbrook,
Hammond, Chicago, Elgin, DeKalb, Lombard, Crystal Lake, Oak Forest,
Orland Park, Roselawn, Carol Stream, Waukegan, Park Forest, McHenry,
Evanston, Oswego, Bourbonnais, Aurora, Kankakee, Crete, Yorkville,
Plainfield, Joliet, Kentland, Morocco, Portage, Cicero, Buffalo
Grove, Bradley, Schaumburg, DeMotte, Oak Lawn, Chesterton,
Bolingbrook, Palatine, Sycamore, Merrillville, Channahon, Mokena,
Minooka, Beecher, Plano, Gurnee, Calumet City, Lemont, Manhattan,
Coal City, Valparaiso, Rensselaer, La Grange, Gary, Peotone,
Woodstock, Downers Grove, Morris, Naperville, Wilmington, Algonquin,
and Oak Park
902 PM CDT Sun Aug 9 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Illinois, including the following areas,
Central Cook, De Kalb, DuPage, Eastern Will, Grundy, Kane,
Kankakee, Kendall, Lake IL, McHenry, Northern Cook, Northern Will,
Southern Cook and Southern Will and northwest Indiana, including
the following areas, Jasper, Lake IN, Newton and Porter.
* WHEN...Until 7 AM CDT Monday.
* 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.
* ADDITIONAL DETAILS...
- Showers and thunderstorms are developing along a stalled surface
front. Atmospheric conditions are favorable for heavy rainfall
with localized rainfall rates exceeding 2 inches per hour late
this evening through the overnight. Slow storm motion and the
potential for multiple rounds of rainfall will increase the
threat for flooding in some areas. Portions of northeastern
Illinois received 1 to 3 inches of rainfall earlier today which
also increases the threat for additional flooding.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Watch for flash flooding means rapid-onset flooding is
possible, but not yet certain, based upon the latest forecasts. Flash
flooding is a dangerous situation. Persons with interests along area
rivers, creeks, and other waterways should monitor the latest
forecasts and be prepared to take action should flooding develop.
&&
$$
WSL
Action: Area Extended Issued At: 2026-08-09 21:03:05
346
WGUS63 KLOT 100202
FFALOT
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
902 PM CDT Sun Aug 9 2026
ILZ003-004-008-010-019-032-033-039-INZ019-101200-
/O.EXA.KLOT.FA.A.0011.000000T0000Z-260810T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-Ogle-Lee-La Salle-Livingston-Iroquois-Ford-Benton-
Including the cities of Paxton, Pontiac, Dixon, Rockford, Rochelle,
Gilman, Streator, Mendota, Byron, Marseilles, Watseka, Belvidere,
Dwight, Ottawa, Fairbury, Fowler, La Salle, Gibson City, Oxford, and
Oregon
902 PM CDT Sun Aug 9 2026 /1002 PM EDT Sun Aug 9 2026/
...FLOOD WATCH IN EFFECT UNTIL 7 AM CDT /8 AM EDT/ MONDAY...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of Illinois, including the following counties,
Boone, Ford, Iroquois, La Salle, Lee, Livingston, Ogle and
Winnebago and northwest Indiana, including the following county,
Benton.
* WHEN...Until 7 AM CDT /8 AM EDT/ Monday.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Roads and streets may
be flooded.
* ADDITIONAL DETAILS...
- Showers and thunderstorms are developing along a stalled surface
front. Atmospheric conditions are favorable for heavy rainfall
with localized rainfall rates exceeding 2 inches per hour late
this evening through the overnight. Slow storm motion and the
potential for multiple rounds of rainfall will increase the
threat for flooding in some areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Watch for flash flooding means rapid-onset flooding is
possible, but not yet certain, based upon the latest forecasts. Flash
flooding is a dangerous situation. Persons with interests along area
rivers, creeks, and other waterways should monitor the latest
forecasts and be prepared to take action should flooding develop.
&&
$$
ILZ005-006-011>013-020-021-023-103>108-INZ001-002-010-011-101200-
/O.CON.KLOT.FA.A.0011.000000T0000Z-260810T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McHenry-Lake IL-De Kalb-Kane-DuPage-Kendall-Grundy-Kankakee-
Northern Cook-Central Cook-Southern Cook-Northern Will-Southern
Will-Eastern Will-Lake IN-Porter-Newton-Jasper-
Including the cities of Wheaton, Mundelein, Des Plaines, Northbrook,
Hammond, Chicago, Elgin, DeKalb, Lombard, Crystal Lake, Oak Forest,
Orland Park, Roselawn, Carol Stream, Waukegan, Park Forest, McHenry,
Evanston, Oswego, Bourbonnais, Aurora, Kankakee, Crete, Yorkville,
Plainfield, Joliet, Kentland, Morocco, Portage, Cicero, Buffalo
Grove, Bradley, Schaumburg, DeMotte, Oak Lawn, Chesterton,
Bolingbrook, Palatine, Sycamore, Merrillville, Channahon, Mokena,
Minooka, Beecher, Plano, Gurnee, Calumet City, Lemont, Manhattan,
Coal City, Valparaiso, Rensselaer, La Grange, Gary, Peotone,
Woodstock, Downers Grove, Morris, Naperville, Wilmington, Algonquin,
and Oak Park
902 PM CDT Sun Aug 9 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Illinois, including the following areas,
Central Cook, De Kalb, DuPage, Eastern Will, Grundy, Kane,
Kankakee, Kendall, Lake IL, McHenry, Northern Cook, Northern Will,
Southern Cook and Southern Will and northwest Indiana, including
the following areas, Jasper, Lake IN, Newton and Porter.
* WHEN...Until 7 AM CDT Monday.
* 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.
* ADDITIONAL DETAILS...
- Showers and thunderstorms are developing along a stalled surface
front. Atmospheric conditions are favorable for heavy rainfall
with localized rainfall rates exceeding 2 inches per hour late
this evening through the overnight. Slow storm motion and the
potential for multiple rounds of rainfall will increase the
threat for flooding in some areas. Portions of northeastern
Illinois received 1 to 3 inches of rainfall earlier today which
also increases the threat for additional flooding.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Watch for flash flooding means rapid-onset flooding is
possible, but not yet certain, based upon the latest forecasts. Flash
flooding is a dangerous situation. Persons with interests along area
rivers, creeks, and other waterways should monitor the latest
forecasts and be prepared to take action should flooding develop.
&&
$$
WSL
Action: Cancelled Issued At: 2026-08-10 03:06:45 338 WGUS63 KLOT 100806 FFALOT Flood Watch National Weather Service Chicago IL 306 AM CDT Mon Aug 10 2026 ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002- 010-011-019-100915- /O.CAN.KLOT.FA.A.0011.000000T0000Z-260810T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-Northern Cook- Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will- Lake IN-Porter-Newton-Jasper-Benton- Including the cities of Wheaton, Oswego, Chicago, Orland Park, Gilman, Plainfield, Manhattan, Belvidere, Sycamore, Oxford, Cicero, Algonquin, La Salle, Paxton, Minooka, Bolingbrook, Watseka, Bradley, Crete, Woodstock, Gurnee, Chesterton, Lombard, Ottawa, Portage, Valparaiso, Merrillville, Rochelle, Pontiac, DeKalb, Park Forest, Coal City, Channahon, Fowler, Bourbonnais, Schaumburg, Joliet, Byron, Naperville, Wilmington, DeMotte, Gary, Crystal Lake, Aurora, Morris, McHenry, Mundelein, Waukegan, Downers Grove, Palatine, Carol Stream, Plano, Evanston, Northbrook, Peotone, Oak Park, Elgin, Kentland, Mendota, Hammond, Morocco, Dixon, Calumet City, Kankakee, Rockford, Rensselaer, La Grange, Gibson City, Marseilles, Lemont, Buffalo Grove, Yorkville, Streator, Fairbury, Des Plaines, Mokena, Roselawn, Oak Lawn, Oak Forest, Dwight, Beecher, and Oregon 306 AM CDT Mon Aug 10 2026 /406 AM EDT Mon Aug 10 2026/ ...FLOOD WATCH IS CANCELLED... The Flood Watch is cancelled for portions of Illinois, including the following areas, Boone, Central Cook, De Kalb, DuPage, Eastern Will, Ford, Grundy, Iroquois, Kane, Kankakee, Kendall, La Salle, Lake IL, Lee, Livingston, McHenry, Northern Cook, Northern Will, Ogle, Southern Cook, Southern Will and Winnebago and northwest Indiana, including the following areas, Benton, Jasper, Lake IN, Newton and Porter. Thunderstorms are exiting the area early this morning. Outside of ongoing flood advisories and warnings, no additional flooding is expected through 7 AM. Therefore, the Flood Watch has been cancelled. Please continue to heed remaining road closures. $$ Ratzer | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||