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Home Return to list Areal Flood Advisory 0085 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-08-09 15:27:54
804
WGUS83 KLOT 092027
FLSLOT
Flood Advisory
National Weather Service Chicago IL
327 PM CDT Sun Aug 9 2026
ILC031-INC089-127-092330-
/O.NEW.KLOT.FA.Y.0085.260809T2027Z-260809T2330Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cook IL-Lake IN-Porter IN-
327 PM CDT Sun Aug 9 2026
...FLOOD ADVISORY IN EFFECT UNTIL 630 PM CDT THIS EVENING...
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Southeastern Cook County in northeastern Illinois...
Northern Lake IN County in northwestern Indiana...
Northern Porter County in northwestern Indiana...
* WHEN...Until 630 PM CDT.
* 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...
- At 325 PM CDT, Doppler radar and automated rain gauges indicated
heavy rain due to thunderstorms. Radar and observations indicate
these storms are producing a quick 1 to 1.5 inches of rain in
less than 30 minutes. This will likely result in minor flooding
shortly after thunderstorms arrive.
- Some locations that will experience flooding include...
Hammond, Gary, Tinley Park, Calumet City, Portage, Merrillville,
Valparaiso, Chicago Heights, East Chicago, Schererville, Hobart,
Lansing, Oak Forest, Harvey, Highland, Blue Island, Munster,
Dolton and Park Forest.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
LAT...LON 4171 8749 4169 8746 4169 8741 4168 8738
4166 8740 4164 8737 4164 8722 4167 8709
4172 8696 4171 8693 4141 8693 4150 8779
4167 8777 4166 8754 4171 8753
$$
Doom
Action: Continued Issued At: 2026-08-09 16:12:25
128
WGUS83 KLOT 092112
FLSLOT
Flood Advisory
National Weather Service Chicago IL
412 PM CDT Sun Aug 9 2026
ILC031-INC089-127-092330-
/O.CON.KLOT.FA.Y.0085.000000T0000Z-260809T2330Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cook IL-Lake IN-Porter IN-
412 PM CDT Sun Aug 9 2026
...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 630 PM CDT THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Southeastern Cook County in northeastern Illinois...
Northern Lake IN County in northwestern Indiana...
Northern Porter County in northwestern Indiana...
* WHEN...Until 630 PM CDT.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Underpasses may be
flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- At 410 PM CDT, Doppler radar and automated rain gauges indicated
heavy rain due to thunderstorms. Minor flooding is ongoing or
expected to begin shortly in the advisory area. Between 0.5 and
1.5 inches of rain have fallen.
- Additional rainfall amounts up to 1 inch are expected over
eastern portions of the advisory area. This additional rain will
result in minor flooding.
- Some locations that will experience flooding include...
Hammond, Gary, Tinley Park, Calumet City, Portage, Merrillville,
Valparaiso, Chicago Heights, East Chicago, Schererville, Hobart,
Lansing, Oak Forest, Harvey, Highland, Blue Island, Munster,
Dolton and Park Forest.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.
&&
LAT...LON 4171 8749 4169 8746 4169 8741 4168 8738
4166 8740 4164 8737 4164 8722 4167 8709
4172 8696 4171 8693 4141 8693 4150 8779
4167 8777 4166 8754 4171 8753
$$
Doom
Action: Continued Issued At: 2026-08-09 16:59:27
599
WGUS83 KLOT 092158
FLSLOT
Flood Advisory
National Weather Service Chicago IL
458 PM CDT Sun Aug 9 2026
ILC031-INC089-127-092330-
/O.CON.KLOT.FA.Y.0085.000000T0000Z-260809T2330Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cook IL-Lake IN-Porter IN-
458 PM CDT Sun Aug 9 2026
...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 630 PM CDT THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Southeastern Cook County in northeastern Illinois...
Northern Lake IN County in northwestern Indiana...
Northern Porter County in northwestern Indiana...
* WHEN...Until 630 PM CDT.
* 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...
- At 458 PM CDT, Doppler radar and automated rain gauges indicated
heavy rain due to thunderstorms. Minor flooding is ongoing or
expected to begin shortly in the advisory area. Between 0.5 and
1.5 inches of rain have fallen.
- Flooding impacts will continue, but no additional heavy rainfall
is expected.
- Some locations that will experience flooding include...
Hammond, Gary, Tinley Park, Calumet City, Portage, Merrillville,
Valparaiso, Chicago Heights, East Chicago, Schererville, Hobart,
Lansing, Oak Forest, Harvey, Highland, Blue Island, Munster,
Dolton and Park Forest.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
LAT...LON 4171 8749 4169 8746 4169 8741 4168 8738
4166 8740 4164 8737 4164 8722 4167 8709
4172 8696 4171 8693 4141 8693 4150 8779
4167 8777 4166 8754 4171 8753
$$
Doom
Action: Continued Issued At: 2026-08-09 17:44:58
832
WGUS83 KLOT 092244
FLSLOT
Flood Advisory
National Weather Service Chicago IL
544 PM CDT Sun Aug 9 2026
ILC031-INC089-127-092330-
/O.CON.KLOT.FA.Y.0085.000000T0000Z-260809T2330Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cook IL-Lake IN-Porter IN-
544 PM CDT Sun Aug 9 2026
...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 630 PM CDT THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Southeastern Cook County in northeastern Illinois...
Northern Lake IN County in northwestern Indiana...
Northern Porter County in northwestern Indiana...
* WHEN...Until 630 PM CDT.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Underpasses may be
flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- At 543 PM CDT, Doppler radar and automated rain gauges indicated
heavy rain due to thunderstorms. Minor flooding is ongoing or
expected to begin shortly in the advisory area. Between 0.5 and
1.5 inches of rain have fallen.
- Additional rainfall amounts up to 1 inch are expected, mainly
across far northern Lake and northern Porter counties. This
additional rain will result in minor flooding.
- Some locations that will experience flooding include...
Hammond, Gary, Tinley Park, Calumet City, Portage, Merrillville,
Valparaiso, Chicago Heights, East Chicago, Schererville, Hobart,
Lansing, Oak Forest, Harvey, Highland, Blue Island, Munster,
Dolton and Park Forest.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.
&&
LAT...LON 4171 8749 4169 8746 4169 8741 4168 8738
4166 8740 4164 8737 4164 8722 4167 8709
4172 8696 4171 8693 4141 8693 4150 8779
4167 8777 4166 8754 4171 8753
$$
Doom
Action: Expired Issued At: 2026-08-09 18:29:00
174
WGUS83 KLOT 092328
FLSLOT
Flood Advisory
National Weather Service Chicago IL
628 PM CDT Sun Aug 9 2026
ILC031-INC089-127-092338-
/O.EXP.KLOT.FA.Y.0085.000000T0000Z-260809T2330Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cook IL-Lake IN-Porter IN-
628 PM CDT Sun Aug 9 2026
...FLOOD ADVISORY WILL EXPIRE AT 630 PM CDT THIS EVENING...
The Flood Advisory will expire at 630 PM CDT this evening for
portions of northeast Illinois, including the following area, Cook
and northwest Indiana, including the following areas, Lake IN and
Porter.
The heavy rain has largely ended and new flooding impacts are not
expected to develop. A Flash Flood Warning remains in effect for far
northeastern Lake and northern Porter counties until 8 PM CDT where
flooding impacts will linger. Please continue to heed remaining road
closures.
&&
LAT...LON 4171 8749 4169 8746 4169 8741 4168 8738
4166 8740 4164 8737 4164 8722 4167 8709
4172 8696 4171 8693 4141 8693 4150 8779
4167 8777 4166 8754 4171 8753
$$
Doom
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