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Home Return to list Areal Flood Advisory 0081 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-08-09 12:43:50
350
WGUS83 KLOT 091743
FLSLOT
Flood Advisory
National Weather Service Chicago IL
1243 PM CDT Sun Aug 9 2026
ILC097-111-092045-
/O.NEW.KLOT.FA.Y.0081.260809T1743Z-260809T2045Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake IL-McHenry IL-
1243 PM CDT Sun Aug 9 2026
...FLOOD ADVISORY IN EFFECT UNTIL 345 PM CDT THIS AFTERNOON...
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Lake IL County in northeastern Illinois...
Southeastern McHenry County in northeastern Illinois...
* WHEN...Until 345 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 1243 PM CDT, Doppler radar indicated heavy rain due to
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 of 1 to 2 inches are expected over
the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include...
Waukegan, Buffalo Grove, Crystal Lake, North Chicago, Gurnee,
Mundelein, Algonquin, Highland Park, Lake in the Hills, Round
Lake Beach, McHenry, Vernon Hills, Zion, Huntley, Grayslake,
Libertyville and Lake Zurich.
- 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 4216 8842 4242 8819 4249 8790 4249 8780
4248 8780 4248 8779 4238 8779 4235 8782
4231 8781 4229 8782 4222 8779 4215 8775
$$
Carlaw
Action: Continued Issued At: 2026-08-09 14:09:52
646
WGUS83 KLOT 091909
FLSLOT
Flood Advisory
National Weather Service Chicago IL
209 PM CDT Sun Aug 9 2026
ILC097-111-092045-
/O.CON.KLOT.FA.Y.0081.000000T0000Z-260809T2045Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake IL-McHenry IL-
209 PM CDT Sun Aug 9 2026
...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 345 PM CDT THIS
AFTERNOON...
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Lake IL County in northeastern Illinois...
Southeastern McHenry County in northeastern Illinois...
* WHEN...Until 345 PM CDT.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Underpasses may be
flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- At 209 PM CDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 1 and 2 inches of rain have
fallen.
- Some locations that will experience flooding include...
Waukegan, Buffalo Grove, Crystal Lake, North Chicago, Gurnee,
Mundelein, Algonquin, Highland Park, Lake in the Hills, Round
Lake Beach, McHenry, Vernon Hills, Zion, Huntley, Grayslake,
Libertyville and Lake Zurich.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.
&&
LAT...LON 4216 8842 4242 8819 4249 8790 4249 8780
4248 8780 4248 8779 4238 8779 4235 8782
4231 8781 4229 8782 4222 8779 4215 8775
$$
Doom
Action: Continued Issued At: 2026-08-09 14:55:23
804
WGUS83 KLOT 091954
FLSLOT
Flood Advisory
National Weather Service Chicago IL
254 PM CDT Sun Aug 9 2026
ILC097-111-092045-
/O.CON.KLOT.FA.Y.0081.000000T0000Z-260809T2045Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake IL-McHenry IL-
254 PM CDT Sun Aug 9 2026
...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 345 PM CDT THIS
AFTERNOON...
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Lake IL County in northeastern Illinois...
Southeastern McHenry County in northeastern Illinois...
* WHEN...Until 345 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 254 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 1.5 and
2.5 inches of rain have fallen.
- Flooding impacts will continue, but little to no additional
rainfall is expected.
- Some locations that will experience flooding include...
Waukegan, Buffalo Grove, Crystal Lake, North Chicago, Gurnee,
Mundelein, Algonquin, Highland Park, Lake in the Hills, Round
Lake Beach, McHenry, Vernon Hills, Zion, Huntley, Grayslake,
Libertyville and Lake Zurich.
- 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 4216 8842 4242 8819 4249 8790 4249 8780
4248 8780 4248 8779 4238 8779 4235 8782
4231 8781 4229 8782 4222 8779 4215 8775
$$
Doom
Action: Expired Issued At: 2026-08-09 15:38:24
149
WGUS83 KLOT 092038
FLSLOT
Flood Advisory
National Weather Service Chicago IL
338 PM CDT Sun Aug 9 2026
ILC097-111-092048-
/O.EXP.KLOT.FA.Y.0081.000000T0000Z-260809T2045Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake IL-McHenry IL-
338 PM CDT Sun Aug 9 2026
...FLOOD ADVISORY WILL EXPIRE AT 345 PM CDT THIS AFTERNOON...
The Flood Advisory will expire at 345 PM CDT this afternoon for a
portion of northeast Illinois, including the following areas, Lake IL
and McHenry.
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
&&
LAT...LON 4216 8842 4242 8819 4249 8790 4249 8780
4248 8780 4248 8779 4238 8779 4235 8782
4231 8781 4229 8782 4222 8779 4215 8775
$$
Doom
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