108 
WGUS83 KLOT 111432
FLSLOT

Flood Advisory
National Weather Service Chicago IL
932 AM CDT Tue Aug 11 2026

ILC007-037-099-103-141-201-111830-
/O.NEW.KLOT.FA.Y.0097.260811T1432Z-260811T1830Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-De Kalb IL-La Salle IL-Lee IL-Ogle IL-Winnebago IL-
932 AM CDT Tue Aug 11 2026

...FLOOD ADVISORY IN EFFECT UNTIL 130 PM CDT THIS AFTERNOON...

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...Boone County in north central Illinois...
  De Kalb County in north central Illinois...
  Northern La Salle County in north central Illinois...
  Lee County in north central Illinois...
  Ogle County in north central Illinois...
  Southern Winnebago County in north central Illinois...

* WHEN...Until 130 PM CDT.

* IMPACTS...Creeks and streams may rise out of their banks. Roads and
  streets may be flooded.

* ADDITIONAL DETAILS...
  - At 931 AM CDT, Doppler radar and automated rain gauges indicated
    a line of intense thunderstorms with rainfall rates of 2 to 3
    inches per hour moving through the area. Localized flooding of
    roadways and poor drainage areas will occur shortly after the
    onset of rainfall.
  - Some locations that will experience flooding include...
    Rockford, DeKalb, Belvidere, Loves Park, Machesney Park, Ottawa,
    Sycamore, Dixon, Rochelle, Sandwich, Mendota, Poplar Grove,
    Genoa, Byron, Oregon, Mount Morris, Amboy, Polo and Sheridan.
  - 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 4193 8963 4193 8969 4220 8969 4220 8940
      4237 8939 4236 8871 4215 8871 4215 8859
      4138 8859 4137 8916 4159 8917 4158 8963


$$

WSL

976 
WGUS83 KLOT 111652
FLSLOT

Flood Advisory
National Weather Service Chicago IL
1152 AM CDT Tue Aug 11 2026

ILC007-099-141-201-111702-
/O.CAN.KLOT.FA.Y.0097.000000T0000Z-260811T1830Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-La Salle IL-Ogle IL-Winnebago IL-
1152 AM CDT Tue Aug 11 2026

...FLOOD ADVISORY IS CANCELLED...

The Flood Advisory is cancelled for a portion of north central
Illinois, including the following areas, Boone, La Salle, Ogle and
Winnebago.

Heavy rain has moved at of the area and no new flooding is expected.

&&

LAT...LON 4189 8894 4191 8881 4191 8860 4163 8860
      4163 8861 4166 8889 4177 8908 4187 8905


$$

ILC037-103-111830-
/O.CON.KLOT.FA.Y.0097.000000T0000Z-260811T1830Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
De Kalb IL-Lee IL-
1152 AM CDT Tue Aug 11 2026

...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 130 PM CDT THIS
AFTERNOON...

* WHAT...Flooding caused by excessive rainfall continues.

* WHERE...Southern De Kalb County in north central Illinois...
  Northeastern Lee County in north central Illinois...

* WHEN...Until 130 PM CDT.

* IMPACTS...Creeks and streams may rise out of their banks. Roads and
  streets may be flooded.

* ADDITIONAL DETAILS...
  - At 1150 AM CDT, Doppler radar and automated rain gauges indicated
    up to 1.5 inches of rain occurred due to earlier thunderstorms.
    Heavy rainfall has moved out of the area, but some standing water
    may be slow to recede over the next few hours.
  - Flooding impacts will continue, but no additional rainfall is
    expected.
  - Some locations that may experience flooding include...
    DeKalb, Sandwich, Shabbona, Hinckley, Somonauk, Waterman, Maple
    Park, Lee and Steward.
  - 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 4189 8894 4191 8881 4191 8860 4163 8860
      4163 8861 4166 8889 4177 8908 4187 8905


$$

WSL

976 
WGUS83 KLOT 111652
FLSLOT

Flood Advisory
National Weather Service Chicago IL
1152 AM CDT Tue Aug 11 2026

ILC007-099-141-201-111702-
/O.CAN.KLOT.FA.Y.0097.000000T0000Z-260811T1830Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-La Salle IL-Ogle IL-Winnebago IL-
1152 AM CDT Tue Aug 11 2026

...FLOOD ADVISORY IS CANCELLED...

The Flood Advisory is cancelled for a portion of north central
Illinois, including the following areas, Boone, La Salle, Ogle and
Winnebago.

Heavy rain has moved at of the area and no new flooding is expected.

&&

LAT...LON 4189 8894 4191 8881 4191 8860 4163 8860
      4163 8861 4166 8889 4177 8908 4187 8905


$$

ILC037-103-111830-
/O.CON.KLOT.FA.Y.0097.000000T0000Z-260811T1830Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
De Kalb IL-Lee IL-
1152 AM CDT Tue Aug 11 2026

...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 130 PM CDT THIS
AFTERNOON...

* WHAT...Flooding caused by excessive rainfall continues.

* WHERE...Southern De Kalb County in north central Illinois...
  Northeastern Lee County in north central Illinois...

* WHEN...Until 130 PM CDT.

* IMPACTS...Creeks and streams may rise out of their banks. Roads and
  streets may be flooded.

* ADDITIONAL DETAILS...
  - At 1150 AM CDT, Doppler radar and automated rain gauges indicated
    up to 1.5 inches of rain occurred due to earlier thunderstorms.
    Heavy rainfall has moved out of the area, but some standing water
    may be slow to recede over the next few hours.
  - Flooding impacts will continue, but no additional rainfall is
    expected.
  - Some locations that may experience flooding include...
    DeKalb, Sandwich, Shabbona, Hinckley, Somonauk, Waterman, Maple
    Park, Lee and Steward.
  - 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 4189 8894 4191 8881 4191 8860 4163 8860
      4163 8861 4166 8889 4177 8908 4187 8905


$$

WSL