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Home Return to list Areal Flood Advisory 0091 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-08-09 23:32:39
199
WGUS83 KLOT 100432
FLSLOT
Flood Advisory
National Weather Service Chicago IL
1132 PM CDT Sun Aug 9 2026
ILC037-099-100730-
/O.NEW.KLOT.FA.Y.0091.260810T0432Z-260810T0730Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
De Kalb IL-La Salle IL-
1132 PM CDT Sun Aug 9 2026
...FLOOD ADVISORY IN EFFECT UNTIL 230 AM CDT MONDAY...
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Southwestern De Kalb County in north central Illinois...
La Salle County in north central Illinois...
* WHEN...Until 230 AM CDT.
* IMPACTS...Creeks and streams may rise out of their banks. Roads and
streets may be flooded.
* ADDITIONAL DETAILS...
- At 1131 PM CDT, Doppler radar indicated slow moving thunderstorms
producing rainfall rates of 1 to 2 inches per hour. Up to 1.5
inches of rain have fallen so far near Grand Ridge. Minor
flooding is ongoing or expected to begin shortly in the advisory
area.
- Some locations that will experience flooding include...
Ottawa, Streator, Peru, La Salle, Sandwich, Mendota, Marseilles,
Sheridan, Shabbona, Lake Holiday, Oglesby, Seneca, Somonauk,
Earlville, Waterman, North Utica, Serena, Leland, Tonica and
Grand Ridge.
- 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 4131 8916 4163 8917 4163 8894 4189 8894
4176 8873 4164 8860 4150 8860 4111 8859
4111 8916
$$
WSL
Action: Cancelled Issued At: 2026-08-10 01:32:13
611
WGUS83 KLOT 100632
FLSLOT
Flood Advisory
National Weather Service Chicago IL
132 AM CDT Mon Aug 10 2026
ILC037-099-100642-
/O.CAN.KLOT.FA.Y.0091.000000T0000Z-260810T0730Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
De Kalb IL-La Salle IL-
132 AM CDT Mon Aug 10 2026
...FLOOD ADVISORY CONTINUES THROUGH THE OVERNIGHT HOURS...
The Flood Advisory is replaced by a new Flood Advisory for portions
of De Kalb and La Salle counties.
Flooding of streams, roadways, and fields may be slow to recede
overnight. See the new Flood Advisory product for additional
information.
&&
LAT...LON 4131 8916 4163 8917 4163 8894 4189 8894
4176 8873 4164 8860 4150 8860 4111 8859
4111 8916
$$
WSL
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