|
Home Return to list Areal Flood Watch 0016 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-09-18 13:47:51
997
WGUS63 KLOT 181847
FFALOT
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
147 PM CDT Fri Sep 18 2026
ILZ003>005-008-190415-
/O.NEW.KLOT.FA.A.0016.260919T0600Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Ogle-
Including the cities of Woodstock, Byron, Belvidere, Rochelle,
Rockford, McHenry, Algonquin, Oregon, and Crystal Lake
147 PM CDT Fri Sep 18 2026
...FLOOD WATCH IN EFFECT FROM 1 AM CDT SATURDAY THROUGH SATURDAY
MORNING...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of north central and northeast Illinois, including
the following counties, in north central Illinois, Boone, Ogle and
Winnebago. In northeast Illinois, McHenry.
* WHEN...From 1 AM CDT Saturday through Saturday morning.
* IMPACTS...Creeks and streams may rise out of their banks. Roads and
streets may be flooded.
* ADDITIONAL DETAILS...
- Showers and thunderstorms overnight into Saturday morning may
produce widespread rainfall rates up to 2 inches per hour that
could lead to flash flooding.
Additional thunderstorms Saturday evening into early Sunday
morning have the potential to produce torrential rainfall that
results in flash flooding, though the exact placement of this
rainfall remains unclear. A second Flood Watch for flash flooding
may be needed during this period.
- 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.
&&
$$
ILZ006-010>013-020-103>106-INZ001-002-190415-
/O.NEW.KLOT.FA.A.0016.260919T0900Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake IL-Lee-De Kalb-Kane-DuPage-Kendall-Northern Cook-Central
Cook-Southern Cook-Northern Will-Lake IN-Porter-
Including the cities of Plano, Evanston, Aurora, Waukegan, Calumet
City, Mokena, Naperville, Chicago, Yorkville, Merrillville, DeKalb,
Lemont, Elgin, Orland Park, Hammond, Northbrook, Mundelein,
Schaumburg, Des Plaines, Joliet, Gurnee, Park Forest, Plainfield,
Carol Stream, Oswego, Palatine, Cicero, Valparaiso, Downers Grove,
Oak Park, Chesterton, Sycamore, Lombard, Portage, Gary, Oak Lawn,
Bolingbrook, Buffalo Grove, Wheaton, La Grange, Oak Forest, and Dixon
147 PM CDT Fri Sep 18 2026
...FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of Illinois, including the following areas, Cook,
De Kalb, DuPage, Kane, Kendall, Lake, Lee, and Northern Will and
northwest Indiana, including the following areas, Lake and Porter.
* WHEN...From late tonight through Saturday 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...
- Showers and thunderstorms late tonight through Saturday morning
may produce widespread rainfall rates up to 2 inches per hour
that could lead to flash flooding, particularly over urban areas.
Additional thunderstorms Saturday evening into early Sunday
morning have the potential to produce torrential rainfall that
results in flash flooding, though the exact placement of this
rainfall remains unclear. A second Flood Watch for flash flooding
may be needed during this period.
- 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.
&&
$$
Kluber
Action: New Issued At: 2026-09-18 13:47:51
997
WGUS63 KLOT 181847
FFALOT
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
147 PM CDT Fri Sep 18 2026
ILZ003>005-008-190415-
/O.NEW.KLOT.FA.A.0016.260919T0600Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Ogle-
Including the cities of Woodstock, Byron, Belvidere, Rochelle,
Rockford, McHenry, Algonquin, Oregon, and Crystal Lake
147 PM CDT Fri Sep 18 2026
...FLOOD WATCH IN EFFECT FROM 1 AM CDT SATURDAY THROUGH SATURDAY
MORNING...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of north central and northeast Illinois, including
the following counties, in north central Illinois, Boone, Ogle and
Winnebago. In northeast Illinois, McHenry.
* WHEN...From 1 AM CDT Saturday through Saturday morning.
* IMPACTS...Creeks and streams may rise out of their banks. Roads and
streets may be flooded.
* ADDITIONAL DETAILS...
- Showers and thunderstorms overnight into Saturday morning may
produce widespread rainfall rates up to 2 inches per hour that
could lead to flash flooding.
Additional thunderstorms Saturday evening into early Sunday
morning have the potential to produce torrential rainfall that
results in flash flooding, though the exact placement of this
rainfall remains unclear. A second Flood Watch for flash flooding
may be needed during this period.
- 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.
&&
$$
ILZ006-010>013-020-103>106-INZ001-002-190415-
/O.NEW.KLOT.FA.A.0016.260919T0900Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake IL-Lee-De Kalb-Kane-DuPage-Kendall-Northern Cook-Central
Cook-Southern Cook-Northern Will-Lake IN-Porter-
Including the cities of Plano, Evanston, Aurora, Waukegan, Calumet
City, Mokena, Naperville, Chicago, Yorkville, Merrillville, DeKalb,
Lemont, Elgin, Orland Park, Hammond, Northbrook, Mundelein,
Schaumburg, Des Plaines, Joliet, Gurnee, Park Forest, Plainfield,
Carol Stream, Oswego, Palatine, Cicero, Valparaiso, Downers Grove,
Oak Park, Chesterton, Sycamore, Lombard, Portage, Gary, Oak Lawn,
Bolingbrook, Buffalo Grove, Wheaton, La Grange, Oak Forest, and Dixon
147 PM CDT Fri Sep 18 2026
...FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of Illinois, including the following areas, Cook,
De Kalb, DuPage, Kane, Kendall, Lake, Lee, and Northern Will and
northwest Indiana, including the following areas, Lake and Porter.
* WHEN...From late tonight through Saturday 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...
- Showers and thunderstorms late tonight through Saturday morning
may produce widespread rainfall rates up to 2 inches per hour
that could lead to flash flooding, particularly over urban areas.
Additional thunderstorms Saturday evening into early Sunday
morning have the potential to produce torrential rainfall that
results in flash flooding, though the exact placement of this
rainfall remains unclear. A second Flood Watch for flash flooding
may be needed during this period.
- 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.
&&
$$
Kluber
Action: Continued Issued At: 2026-09-18 21:50:06
795
WGUS63 KLOT 190249
FFALOT
Flood Watch
National Weather Service Chicago IL
949 PM CDT Fri Sep 18 2026
ILZ003>005-008-191100-
/O.CON.KLOT.FA.A.0016.260919T0600Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Ogle-
Including the cities of Byron, Belvidere, McHenry, Algonquin, Crystal
Lake, Woodstock, Rochelle, Oregon, and Rockford
949 PM CDT Fri Sep 18 2026
...FLOOD WATCH REMAINS IN EFFECT FROM 1 AM CDT SATURDAY THROUGH
SATURDAY AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of north central and northeast Illinois, including
the following counties, in north central Illinois, Boone, Ogle and
Winnebago. In northeast Illinois, McHenry.
* WHEN...From 1 AM CDT Saturday through Saturday afternoon.
* IMPACTS...Creeks and streams may rise out of their banks. Roads and
streets may be flooded.
* ADDITIONAL DETAILS...
- Showers and thunderstorms overnight into Saturday morning may
produce widespread rainfall rates up to 2 inches per hour that
could lead to flash flooding.
Additional thunderstorms Saturday evening into early Sunday
morning have the potential to produce torrential rainfall that
results in flash flooding, though the exact placement of this
rainfall remains unclear. A second Flood Watch for flash flooding
may be needed during this period.
- 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.
&&
$$
ILZ006-010>013-020-103>106-INZ001-002-191100-
/O.CON.KLOT.FA.A.0016.260919T0900Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake IL-Lee-De Kalb-Kane-DuPage-Kendall-Northern Cook-Central
Cook-Southern Cook-Northern Will-Lake IN-Porter-
Including the cities of Carol Stream, Buffalo Grove, DeKalb, Oak
Forest, Naperville, Park Forest, Lombard, Des Plaines, Hammond,
Chesterton, Plainfield, Oswego, Mokena, La Grange, Cicero, Wheaton,
Northbrook, Portage, Valparaiso, Plano, Oak Lawn, Bolingbrook, Oak
Park, Sycamore, Chicago, Calumet City, Orland Park, Merrillville,
Gurnee, Schaumburg, Gary, Joliet, Palatine, Downers Grove, Elgin,
Lemont, Dixon, Aurora, Mundelein, Evanston, Yorkville, and Waukegan
949 PM CDT Fri Sep 18 2026
...FLOOD WATCH REMAINS IN EFFECT FROM 4 AM CDT SATURDAY THROUGH
SATURDAY AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Illinois, including the following areas,
Central Cook, De Kalb, DuPage, Kane, Kendall, Lake IL, Lee,
Northern Cook, Northern Will and Southern Cook and northwest
Indiana, including the following areas, Lake IN and Porter.
* WHEN...From 4 AM CDT Saturday through Saturday afternoon.
* 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 late tonight through Saturday morning
may produce widespread rainfall rates up to 2 inches per hour
that could lead to flash flooding, particularly over urban areas.
Additional thunderstorms Saturday evening into early Sunday
morning have the potential to produce torrential rainfall that
results in flash flooding, though the exact placement of this
rainfall remains unclear. A second Flood Watch for flash flooding
may be needed during this period.
- 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.
&&
$$
Ogorek
Action: Continued Issued At: 2026-09-18 21:50:06
795
WGUS63 KLOT 190249
FFALOT
Flood Watch
National Weather Service Chicago IL
949 PM CDT Fri Sep 18 2026
ILZ003>005-008-191100-
/O.CON.KLOT.FA.A.0016.260919T0600Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Ogle-
Including the cities of Byron, Belvidere, McHenry, Algonquin, Crystal
Lake, Woodstock, Rochelle, Oregon, and Rockford
949 PM CDT Fri Sep 18 2026
...FLOOD WATCH REMAINS IN EFFECT FROM 1 AM CDT SATURDAY THROUGH
SATURDAY AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of north central and northeast Illinois, including
the following counties, in north central Illinois, Boone, Ogle and
Winnebago. In northeast Illinois, McHenry.
* WHEN...From 1 AM CDT Saturday through Saturday afternoon.
* IMPACTS...Creeks and streams may rise out of their banks. Roads and
streets may be flooded.
* ADDITIONAL DETAILS...
- Showers and thunderstorms overnight into Saturday morning may
produce widespread rainfall rates up to 2 inches per hour that
could lead to flash flooding.
Additional thunderstorms Saturday evening into early Sunday
morning have the potential to produce torrential rainfall that
results in flash flooding, though the exact placement of this
rainfall remains unclear. A second Flood Watch for flash flooding
may be needed during this period.
- 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.
&&
$$
ILZ006-010>013-020-103>106-INZ001-002-191100-
/O.CON.KLOT.FA.A.0016.260919T0900Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake IL-Lee-De Kalb-Kane-DuPage-Kendall-Northern Cook-Central
Cook-Southern Cook-Northern Will-Lake IN-Porter-
Including the cities of Carol Stream, Buffalo Grove, DeKalb, Oak
Forest, Naperville, Park Forest, Lombard, Des Plaines, Hammond,
Chesterton, Plainfield, Oswego, Mokena, La Grange, Cicero, Wheaton,
Northbrook, Portage, Valparaiso, Plano, Oak Lawn, Bolingbrook, Oak
Park, Sycamore, Chicago, Calumet City, Orland Park, Merrillville,
Gurnee, Schaumburg, Gary, Joliet, Palatine, Downers Grove, Elgin,
Lemont, Dixon, Aurora, Mundelein, Evanston, Yorkville, and Waukegan
949 PM CDT Fri Sep 18 2026
...FLOOD WATCH REMAINS IN EFFECT FROM 4 AM CDT SATURDAY THROUGH
SATURDAY AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Illinois, including the following areas,
Central Cook, De Kalb, DuPage, Kane, Kendall, Lake IL, Lee,
Northern Cook, Northern Will and Southern Cook and northwest
Indiana, including the following areas, Lake IN and Porter.
* WHEN...From 4 AM CDT Saturday through Saturday afternoon.
* 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 late tonight through Saturday morning
may produce widespread rainfall rates up to 2 inches per hour
that could lead to flash flooding, particularly over urban areas.
Additional thunderstorms Saturday evening into early Sunday
morning have the potential to produce torrential rainfall that
results in flash flooding, though the exact placement of this
rainfall remains unclear. A second Flood Watch for flash flooding
may be needed during this period.
- 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.
&&
$$
Ogorek
Action: Continued Issued At: 2026-09-19 03:40:03
052
WGUS63 KLOT 190839
FFALOT
Flood Watch
National Weather Service Chicago IL
339 AM CDT Sat Sep 19 2026
ILZ003>005-008-191645-
/O.CON.KLOT.FA.A.0016.000000T0000Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Ogle-
Including the cities of Woodstock, Rockford, Oregon, Crystal Lake,
Belvidere, Algonquin, Byron, McHenry, and Rochelle
339 AM CDT Sat Sep 19 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of north central and northeast Illinois, including
the following counties, in north central Illinois, Boone, Ogle and
Winnebago. In northeast Illinois, McHenry.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Creeks and streams may rise out of their banks. Roads and
streets may be flooded.
* ADDITIONAL DETAILS...
- Showers and thunderstorms will produce heavy rain this morning
which may cause localized flash flooding. Additional showers and
thunderstorms may produce heavy rain and localized flash flooding
tonight when another flood watch for flash flooding may be
needed.
- 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.
&&
$$
ILZ006-010>013-020-103>106-INZ001-002-191645-
/O.CON.KLOT.FA.A.0016.260919T0900Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake IL-Lee-De Kalb-Kane-DuPage-Kendall-Northern Cook-Central
Cook-Southern Cook-Northern Will-Lake IN-Porter-
Including the cities of Wheaton, Cicero, Merrillville, Orland Park,
Gary, Downers Grove, Mokena, Plainfield, Hammond, Sycamore, DeKalb,
Calumet City, Schaumburg, La Grange, Oak Park, Buffalo Grove,
Northbrook, Waukegan, Dixon, Aurora, Oak Forest, Gurnee, Park Forest,
Palatine, Carol Stream, Valparaiso, Mundelein, Lombard, Chesterton,
Evanston, Yorkville, Bolingbrook, Portage, Elgin, Oak Lawn, Chicago,
Plano, Des Plaines, Lemont, Naperville, Joliet, and Oswego
339 AM CDT Sat Sep 19 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Illinois, including the following areas,
Central Cook, De Kalb, DuPage, Kane, Kendall, Lake IL, Lee,
Northern Cook, Northern Will and Southern Cook and northwest
Indiana, including the following areas, Lake IN and Porter.
* WHEN...Until 1 PM CDT this afternoon.
* 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 will produce heavy rain this morning
which may cause localized flash flooding. Additional showers and
thunderstorms may produce heavy rain and localized flash flooding
tonight when another flood watch for flash flooding may be
needed.
- 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.
&&
$$
Action: Continued Issued At: 2026-09-19 03:40:03
052
WGUS63 KLOT 190839
FFALOT
Flood Watch
National Weather Service Chicago IL
339 AM CDT Sat Sep 19 2026
ILZ003>005-008-191645-
/O.CON.KLOT.FA.A.0016.000000T0000Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Ogle-
Including the cities of Woodstock, Rockford, Oregon, Crystal Lake,
Belvidere, Algonquin, Byron, McHenry, and Rochelle
339 AM CDT Sat Sep 19 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of north central and northeast Illinois, including
the following counties, in north central Illinois, Boone, Ogle and
Winnebago. In northeast Illinois, McHenry.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Creeks and streams may rise out of their banks. Roads and
streets may be flooded.
* ADDITIONAL DETAILS...
- Showers and thunderstorms will produce heavy rain this morning
which may cause localized flash flooding. Additional showers and
thunderstorms may produce heavy rain and localized flash flooding
tonight when another flood watch for flash flooding may be
needed.
- 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.
&&
$$
ILZ006-010>013-020-103>106-INZ001-002-191645-
/O.CON.KLOT.FA.A.0016.260919T0900Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake IL-Lee-De Kalb-Kane-DuPage-Kendall-Northern Cook-Central
Cook-Southern Cook-Northern Will-Lake IN-Porter-
Including the cities of Wheaton, Cicero, Merrillville, Orland Park,
Gary, Downers Grove, Mokena, Plainfield, Hammond, Sycamore, DeKalb,
Calumet City, Schaumburg, La Grange, Oak Park, Buffalo Grove,
Northbrook, Waukegan, Dixon, Aurora, Oak Forest, Gurnee, Park Forest,
Palatine, Carol Stream, Valparaiso, Mundelein, Lombard, Chesterton,
Evanston, Yorkville, Bolingbrook, Portage, Elgin, Oak Lawn, Chicago,
Plano, Des Plaines, Lemont, Naperville, Joliet, and Oswego
339 AM CDT Sat Sep 19 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Illinois, including the following areas,
Central Cook, De Kalb, DuPage, Kane, Kendall, Lake IL, Lee,
Northern Cook, Northern Will and Southern Cook and northwest
Indiana, including the following areas, Lake IN and Porter.
* WHEN...Until 1 PM CDT this afternoon.
* 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 will produce heavy rain this morning
which may cause localized flash flooding. Additional showers and
thunderstorms may produce heavy rain and localized flash flooding
tonight when another flood watch for flash flooding may be
needed.
- 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.
&&
$$
Action: Time Extended Issued At: 2026-09-19 10:34:46
380
WGUS63 KLOT 191534
FFALOT
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
1034 AM CDT Sat Sep 19 2026
ILZ003-005-192345-
/O.EXT.KLOT.FA.A.0016.000000T0000Z-260920T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-McHenry-
Including the cities of McHenry, Rockford, Crystal Lake, Algonquin,
and Woodstock
1034 AM CDT Sat Sep 19 2026
...FLOOD WATCH NOW IN EFFECT THROUGH SUNDAY MORNING...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of north central and northeast Illinois, including
the following counties, in north central Illinois, Winnebago. In
northeast Illinois, McHenry.
* WHEN...Through early Sunday 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...
- An additional round of showers and thunderstorms, some with very
heavy rainfall, are expected this evening and overnight which may
result in areas of flash flooding, particularly over urban or
areas of poor drainage.
- 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.
&&
$$
ILZ004-006-008-010>013-020-103>106-INZ001-002-192345-
/O.EXT.KLOT.FA.A.0016.000000T0000Z-260920T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-Kendall-Northern Cook-
Central Cook-Southern Cook-Northern Will-Lake IN-Porter-
Including the cities of Chicago, Cicero, Evanston, Park Forest,
Chesterton, Rochelle, Belvidere, Oak Lawn, Naperville, Wheaton,
Aurora, Gurnee, La Grange, Carol Stream, Joliet, Elgin, Merrillville,
Plano, Oak Forest, Schaumburg, Plainfield, Lombard, Oswego, Waukegan,
Lemont, Buffalo Grove, Downers Grove, Orland Park, Valparaiso,
Mokena, Northbrook, Calumet City, Bolingbrook, Portage, Gary,
Yorkville, Hammond, Byron, Sycamore, Dixon, Des Plaines, Oregon, Oak
Park, Mundelein, DeKalb, and Palatine
1034 AM CDT Sat Sep 19 2026
...FLOOD WATCH NOW IN EFFECT THROUGH EARLY SUNDAY MORNING...
* 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, Kane, Kendall, Lake IL, Lee,
Northern Cook, Northern Will, Ogle and Southern Cook and northwest
Indiana, including the following areas, Lake IN and Porter.
* WHEN...Through early Sunday 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...
- An additional round of showers and thunderstorms, some with very
heavy rainfall, are expected this evening and overnight which may
result in areas of flash flooding, particularly over urban or
areas of poor drainage.
- 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.
&&
$$
Action: Time Extended Issued At: 2026-09-19 10:34:46
380
WGUS63 KLOT 191534
FFALOT
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
1034 AM CDT Sat Sep 19 2026
ILZ003-005-192345-
/O.EXT.KLOT.FA.A.0016.000000T0000Z-260920T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-McHenry-
Including the cities of McHenry, Rockford, Crystal Lake, Algonquin,
and Woodstock
1034 AM CDT Sat Sep 19 2026
...FLOOD WATCH NOW IN EFFECT THROUGH SUNDAY MORNING...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of north central and northeast Illinois, including
the following counties, in north central Illinois, Winnebago. In
northeast Illinois, McHenry.
* WHEN...Through early Sunday 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...
- An additional round of showers and thunderstorms, some with very
heavy rainfall, are expected this evening and overnight which may
result in areas of flash flooding, particularly over urban or
areas of poor drainage.
- 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.
&&
$$
ILZ004-006-008-010>013-020-103>106-INZ001-002-192345-
/O.EXT.KLOT.FA.A.0016.000000T0000Z-260920T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-Kendall-Northern Cook-
Central Cook-Southern Cook-Northern Will-Lake IN-Porter-
Including the cities of Chicago, Cicero, Evanston, Park Forest,
Chesterton, Rochelle, Belvidere, Oak Lawn, Naperville, Wheaton,
Aurora, Gurnee, La Grange, Carol Stream, Joliet, Elgin, Merrillville,
Plano, Oak Forest, Schaumburg, Plainfield, Lombard, Oswego, Waukegan,
Lemont, Buffalo Grove, Downers Grove, Orland Park, Valparaiso,
Mokena, Northbrook, Calumet City, Bolingbrook, Portage, Gary,
Yorkville, Hammond, Byron, Sycamore, Dixon, Des Plaines, Oregon, Oak
Park, Mundelein, DeKalb, and Palatine
1034 AM CDT Sat Sep 19 2026
...FLOOD WATCH NOW IN EFFECT THROUGH EARLY SUNDAY MORNING...
* 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, Kane, Kendall, Lake IL, Lee,
Northern Cook, Northern Will, Ogle and Southern Cook and northwest
Indiana, including the following areas, Lake IN and Porter.
* WHEN...Through early Sunday 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...
- An additional round of showers and thunderstorms, some with very
heavy rainfall, are expected this evening and overnight which may
result in areas of flash flooding, particularly over urban or
areas of poor drainage.
- 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.
&&
$$
Action: Continued Issued At: 2026-09-19 15:57:55
882
WGUS63 KLOT 192057
FFALOT
Flood Watch
National Weather Service Chicago IL
357 PM CDT Sat Sep 19 2026
ILZ003>006-008-010>013-020-103>106-INZ001-002-200500-
/O.CON.KLOT.FA.A.0016.000000T0000Z-260920T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
Kendall-Northern Cook-Central Cook-Southern Cook-Northern Will-
Lake IN-Porter-
Including the cities of Chicago, Cicero, Evanston, Park Forest,
Chesterton, Rochelle, Belvidere, Oak Lawn, Naperville, Wheaton,
Aurora, Gurnee, La Grange, Rockford, Carol Stream, Joliet, Algonquin,
Elgin, Merrillville, Plano, Oak Forest, Schaumburg, Plainfield,
Waukegan, Lombard, Oswego, Lemont, Buffalo Grove, Downers Grove,
Orland Park, Valparaiso, Mokena, Northbrook, Calumet City, Woodstock,
Bolingbrook, Portage, Gary, McHenry, Yorkville, Hammond, Crystal
Lake, Byron, Sycamore, Dixon, Des Plaines, Oregon, Oak Park,
Mundelein, DeKalb, and Palatine
357 PM CDT Sat Sep 19 2026
...FLOOD WATCH REMAINS IN EFFECT THROUGH EARLY SUNDAY MORNING...
* 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, Kane, Kendall, Lake IL, Lee,
McHenry, Northern Cook, Northern Will, Ogle, Southern Cook and
Winnebago and northwest Indiana, including the following areas,
Lake IN and Porter.
* WHEN...Through early Sunday 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...
- Showers and thunderstorms, some with torrential rainfall with
hourly rates around 2 inches per hour, are expected to redevelop
across the watch area this evening and overnight. Repeated rounds
of heavy rainfall may result in areas of flash flooding and rapid
rises on area rivers.
- 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.
&&
$$
Carlaw
Action: Continued Issued At: 2026-09-19 20:23:51
930
WGUS63 KLOT 200123
FFALOT
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
823 PM CDT Sat Sep 19 2026
ILZ019-021-023-107-108-200930-
/O.EXA.KLOT.FA.A.0016.000000T0000Z-260920T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
La Salle-Grundy-Kankakee-Southern Will-Eastern Will-
Including the cities of Bourbonnais, Manhattan, Wilmington, Peotone,
Beecher, Ottawa, Channahon, Bradley, Minooka, Marseilles, Crete,
Streator, Kankakee, La Salle, Mendota, Coal City, and Morris
823 PM CDT Sat Sep 19 2026
...FLOOD WATCH IN EFFECT UNTIL 7 AM CDT SUNDAY...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of north central and northeast Illinois, including
the following areas, in north central Illinois, La Salle. In
northeast Illinois, Eastern Will, Grundy, Kankakee and Southern
Will.
* WHEN...Until 7 AM CDT Sunday.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Underpasses may be
flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- Another round of showers and thunderstorms is expected late this
evening and overnight. Swaths of heavy to very heavy rainfall
with 2+ inch per hour rainfall rates are likely to occur within
the watch area and may result in areas of flash flooding and
cause rapid rises on area rivers, creeks, and streams.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Watch for flash flooding means rapid-onset flooding is
possible, but not yet certain, based upon the latest forecasts. Flash
flooding is a dangerous situation. Persons with interests along area
rivers, creeks, and other waterways should monitor the latest
forecasts and be prepared to take action should flooding develop.
&&
$$
ILZ003>006-008-010>013-020-103>106-INZ001-002-200930-
/O.CON.KLOT.FA.A.0016.000000T0000Z-260920T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
Kendall-Northern Cook-Central Cook-Southern Cook-Northern Will-
Lake IN-Porter-
Including the cities of Lemont, Chesterton, Calumet City, Mokena,
Hammond, Plainfield, Chicago, Rochelle, Joliet, Belvidere, Plano,
Downers Grove, Valparaiso, Crystal Lake, Cicero, Byron, Naperville,
Carol Stream, Yorkville, Algonquin, Mundelein, Woodstock, Rockford,
Oak Forest, DeKalb, Oregon, Oswego, Orland Park, Schaumburg, Des
Plaines, Merrillville, Park Forest, Gurnee, Waukegan, Elgin, Lombard,
Palatine, Northbrook, Aurora, Wheaton, Oak Lawn, Portage, Evanston,
Buffalo Grove, Dixon, La Grange, McHenry, Oak Park, Bolingbrook,
Sycamore, and Gary
823 PM CDT Sat Sep 19 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 AM CDT SUNDAY...
* 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, Kane, Kendall, Lake IL, Lee,
McHenry, Northern Cook, Northern Will, Ogle, Southern Cook and
Winnebago and northwest Indiana, including the following areas,
Lake IN and Porter.
* WHEN...Until 7 AM CDT Sunday.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Underpasses may be
flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- Another round of showers and thunderstorms is expected late this
evening and overnight. Swaths of heavy to very heavy rainfall
with 2+ inch per hour rainfall rates are likely to occur within
the watch area and may result in areas of flash flooding and
cause rapid rises on area rivers, creeks, and streams.
- 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.
&&
$$
Ogorek
Action: Area Extended Issued At: 2026-09-19 20:23:51
930
WGUS63 KLOT 200123
FFALOT
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
823 PM CDT Sat Sep 19 2026
ILZ019-021-023-107-108-200930-
/O.EXA.KLOT.FA.A.0016.000000T0000Z-260920T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
La Salle-Grundy-Kankakee-Southern Will-Eastern Will-
Including the cities of Bourbonnais, Manhattan, Wilmington, Peotone,
Beecher, Ottawa, Channahon, Bradley, Minooka, Marseilles, Crete,
Streator, Kankakee, La Salle, Mendota, Coal City, and Morris
823 PM CDT Sat Sep 19 2026
...FLOOD WATCH IN EFFECT UNTIL 7 AM CDT SUNDAY...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of north central and northeast Illinois, including
the following areas, in north central Illinois, La Salle. In
northeast Illinois, Eastern Will, Grundy, Kankakee and Southern
Will.
* WHEN...Until 7 AM CDT Sunday.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Underpasses may be
flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- Another round of showers and thunderstorms is expected late this
evening and overnight. Swaths of heavy to very heavy rainfall
with 2+ inch per hour rainfall rates are likely to occur within
the watch area and may result in areas of flash flooding and
cause rapid rises on area rivers, creeks, and streams.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Watch for flash flooding means rapid-onset flooding is
possible, but not yet certain, based upon the latest forecasts. Flash
flooding is a dangerous situation. Persons with interests along area
rivers, creeks, and other waterways should monitor the latest
forecasts and be prepared to take action should flooding develop.
&&
$$
ILZ003>006-008-010>013-020-103>106-INZ001-002-200930-
/O.CON.KLOT.FA.A.0016.000000T0000Z-260920T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
Kendall-Northern Cook-Central Cook-Southern Cook-Northern Will-
Lake IN-Porter-
Including the cities of Lemont, Chesterton, Calumet City, Mokena,
Hammond, Plainfield, Chicago, Rochelle, Joliet, Belvidere, Plano,
Downers Grove, Valparaiso, Crystal Lake, Cicero, Byron, Naperville,
Carol Stream, Yorkville, Algonquin, Mundelein, Woodstock, Rockford,
Oak Forest, DeKalb, Oregon, Oswego, Orland Park, Schaumburg, Des
Plaines, Merrillville, Park Forest, Gurnee, Waukegan, Elgin, Lombard,
Palatine, Northbrook, Aurora, Wheaton, Oak Lawn, Portage, Evanston,
Buffalo Grove, Dixon, La Grange, McHenry, Oak Park, Bolingbrook,
Sycamore, and Gary
823 PM CDT Sat Sep 19 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 AM CDT SUNDAY...
* 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, Kane, Kendall, Lake IL, Lee,
McHenry, Northern Cook, Northern Will, Ogle, Southern Cook and
Winnebago and northwest Indiana, including the following areas,
Lake IN and Porter.
* WHEN...Until 7 AM CDT Sunday.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Underpasses may be
flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- Another round of showers and thunderstorms is expected late this
evening and overnight. Swaths of heavy to very heavy rainfall
with 2+ inch per hour rainfall rates are likely to occur within
the watch area and may result in areas of flash flooding and
cause rapid rises on area rivers, creeks, and streams.
- 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.
&&
$$
Ogorek
Action: Time Extended Issued At: 2026-09-20 01:33:41
675
WGUS63 KLOT 200633
FFALOT
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
133 AM CDT Sun Sep 20 2026
ILZ003>006-008-010>013-019>021-023-103>108-INZ001-002-201445-
/O.EXT.KLOT.FA.A.0016.000000T0000Z-260920T1800Z/
/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 Downers Grove, Sycamore, Plano, Kankakee,
Minooka, Schaumburg, Dixon, Oak Lawn, Calumet City, Valparaiso,
Bolingbrook, Bourbonnais, Oak Forest, Yorkville, Gurnee, Buffalo
Grove, Chicago, Manhattan, Carol Stream, Belvidere, Lombard, La
Salle, Palatine, Merrillville, Crete, Hammond, Elgin, DeKalb,
Chesterton, Cicero, Plainfield, La Grange, Naperville, Wheaton,
Portage, Bradley, Mendota, Crystal Lake, McHenry, Channahon, Lemont,
Morris, Park Forest, Woodstock, Joliet, Mokena, Byron, Coal City,
Rochelle, Gary, Peotone, Mundelein, Rockford, Marseilles, Oregon,
Ottawa, Waukegan, Des Plaines, Streator, Wilmington, Beecher,
Evanston, Algonquin, Northbrook, Orland Park, Aurora, Oswego, and Oak
Park
133 AM CDT Sun Sep 20 2026
...FLOOD WATCH NOW IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...
* 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 1 PM CDT this afternoon.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Underpasses may be
flooded. Roads and streets may be flooded. Basement flooding may
occur.
* ADDITIONAL DETAILS...
- Periods of showers and thunderstorms are expected through midday.
Swaths of torrential rain with 2 inch per hour rainfall rates, or
higher are likely to occur within the watch area and may result
in areas of flash flooding and cause rapid rises on area rivers,
creeks, and streams.
- 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.
&&
$$
Action: Continued Issued At: 2026-09-20 10:17:49
688
WGUS63 KLOT 201517
FFALOT
Flood Watch
National Weather Service Chicago IL
1017 AM CDT Sun Sep 20 2026
ILZ003>006-201630-
/O.CAN.KLOT.FA.A.0016.000000T0000Z-260920T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Lake IL-
Including the cities of Algonquin, McHenry, Belvidere, Rockford,
Crystal Lake, Woodstock, Waukegan, Buffalo Grove, Mundelein, and
Gurnee
1017 AM CDT Sun Sep 20 2026
...FLOOD WATCH IS CANCELLED...
The Flood Watch is cancelled for portions of north central and
northeast Illinois, including the following areas, in north central
Illinois, Boone and Winnebago. In northeast Illinois, Lake IL and
McHenry.
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
$$
ILZ008-010>013-019>021-023-103>108-INZ001-002-201800-
/O.CON.KLOT.FA.A.0016.000000T0000Z-260920T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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 Hammond, Minooka, Kankakee, Joliet, Mokena,
Plano, Beecher, Park Forest, Byron, Lombard, Portage, Valparaiso,
Evanston, Elgin, Cicero, Merrillville, Morris, La Salle, Oswego, La
Grange, Northbrook, Chesterton, Orland Park, Coal City, Ottawa,
Wilmington, Naperville, Channahon, Oak Lawn, DeKalb, Manhattan,
Downers Grove, Oak Forest, Sycamore, Aurora, Rochelle, Bourbonnais,
Schaumburg, Carol Stream, Streator, Plainfield, Chicago, Peotone,
Mendota, Lemont, Yorkville, Palatine, Oregon, Dixon, Marseilles,
Crete, Bradley, Gary, Bolingbrook, Wheaton, Calumet City, Des
Plaines, and Oak Park
1017 AM CDT Sun Sep 20 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...
* 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, La Salle, Lee, Northern Cook, Northern Will,
Ogle, Southern Cook and Southern Will and northwest Indiana,
including the following areas, Lake IN and Porter.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Underpasses may be
flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- The threat for widespread heavy rainfall is ending. However,
continued moderate to isolated heavy rainfall may lead to a
continued localized flood threat.
- 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.
&&
$$
Action: Cancelled Issued At: 2026-09-20 10:17:49
688
WGUS63 KLOT 201517
FFALOT
Flood Watch
National Weather Service Chicago IL
1017 AM CDT Sun Sep 20 2026
ILZ003>006-201630-
/O.CAN.KLOT.FA.A.0016.000000T0000Z-260920T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Lake IL-
Including the cities of Algonquin, McHenry, Belvidere, Rockford,
Crystal Lake, Woodstock, Waukegan, Buffalo Grove, Mundelein, and
Gurnee
1017 AM CDT Sun Sep 20 2026
...FLOOD WATCH IS CANCELLED...
The Flood Watch is cancelled for portions of north central and
northeast Illinois, including the following areas, in north central
Illinois, Boone and Winnebago. In northeast Illinois, Lake IL and
McHenry.
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
$$
ILZ008-010>013-019>021-023-103>108-INZ001-002-201800-
/O.CON.KLOT.FA.A.0016.000000T0000Z-260920T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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 Hammond, Minooka, Kankakee, Joliet, Mokena,
Plano, Beecher, Park Forest, Byron, Lombard, Portage, Valparaiso,
Evanston, Elgin, Cicero, Merrillville, Morris, La Salle, Oswego, La
Grange, Northbrook, Chesterton, Orland Park, Coal City, Ottawa,
Wilmington, Naperville, Channahon, Oak Lawn, DeKalb, Manhattan,
Downers Grove, Oak Forest, Sycamore, Aurora, Rochelle, Bourbonnais,
Schaumburg, Carol Stream, Streator, Plainfield, Chicago, Peotone,
Mendota, Lemont, Yorkville, Palatine, Oregon, Dixon, Marseilles,
Crete, Bradley, Gary, Bolingbrook, Wheaton, Calumet City, Des
Plaines, and Oak Park
1017 AM CDT Sun Sep 20 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...
* 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, La Salle, Lee, Northern Cook, Northern Will,
Ogle, Southern Cook and Southern Will and northwest Indiana,
including the following areas, Lake IN and Porter.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Underpasses may be
flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- The threat for widespread heavy rainfall is ending. However,
continued moderate to isolated heavy rainfall may lead to a
continued localized flood threat.
- 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.
&&
$$
Action: Expired Issued At: 2026-09-20 13:17:56 997 WGUS63 KLOT 201817 FFALOT Flood Watch National Weather Service Chicago IL 117 PM CDT Sun Sep 20 2026 ILZ008-010>013-019>021-023-103>108-INZ001-002-201930- /O.EXP.KLOT.FA.A.0016.000000T0000Z-260920T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ 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 Hammond, Minooka, Kankakee, Joliet, Mokena, Plano, Beecher, Park Forest, Byron, Lombard, Portage, Valparaiso, Evanston, Elgin, Cicero, Merrillville, Morris, La Salle, Oswego, La Grange, Northbrook, Chesterton, Orland Park, Coal City, Ottawa, Wilmington, Naperville, Channahon, Oak Lawn, DeKalb, Manhattan, Downers Grove, Oak Forest, Sycamore, Aurora, Rochelle, Bourbonnais, Schaumburg, Carol Stream, Streator, Plainfield, Chicago, Peotone, Mendota, Lemont, Yorkville, Palatine, Oregon, Dixon, Marseilles, Crete, Bradley, Gary, Bolingbrook, Wheaton, Calumet City, Des Plaines, and Oak Park 117 PM CDT Sun Sep 20 2026 ...FLOOD WATCH HAS EXPIRED... The Flood Watch has expired for portions of Illinois, including the following areas, Central Cook, De Kalb, DuPage, Eastern Will, Grundy, Kane, Kankakee, Kendall, La Salle, Lee, Northern Cook, Northern Will, Ogle, Southern Cook and Southern Will and northwest Indiana, including the following areas, Lake IN and Porter. The flash flooding threat has ended. Therefore, the Flood Watch has expired. $$ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||