4 products issued by NWS for: Northbrook IL
Hydrologic Outlook
ILC007-031-037-043-053-063-075-089-091-093-097-099-103-105-111-141-
197-201-INC007-073-089-111-127-241800-

Hydrologic Outlook
National Weather Service Chicago IL
220 PM CST Fri Jan 23 2026

...Risk for River Ice Formation and Isolated Ice Jams Will Continue
Into Next Week...

Cold temperatures this week have caused a significant increase in
river ice across the area, including multiple ice jams. Cold
temperatures are expected to continue into next week, with favorable
conditions for river ice formation. Areas of open river may see new
ice growth, while areas with existing ice cover my thicken.

No widespread flooding is expected, but ice jams will be possible in
isolated areas, especially along the Rock, Fox, and Kankakee rivers.
Ice jams may cause rises or fluctuations on area rivers with little
warning.

Persons with interests along area rivers should closely monitor the
latest forecasts.

---

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
357 AM CST Sat Jan 24 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-251000-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
357 AM CST Sat Jan 24 2026 /457 AM EST Sat Jan 24 2026/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.



Weather hazards expected...

Elevated Excessive Cold Risk this morning.
Elevated Snow Risk Tonight.

DISCUSSION...

Bitterly cold weather will persist through this morning, with wind
chills ranging from 20 to 30 below.

Lake effect snow showers will persist across parts of northern
Porter and possibly parts of northeast Lake County in northwest
Indiana early this morning. This will lead to slippery conditions
due to snow-covered roads.

Accumulating snow will spread across the region late this
afternoon and tonight, particularly near and east of I-55,
resulting in hazardous travel conditions.

Extensive ice cover on area rivers may cause localized ice jam
flooding.



Sunday...
Limited Excessive Cold Risk.
Elevated Snow Risk.
Monday...
Elevated Excessive Cold Risk in the morning.
Tuesday night through Friday...
Limited Excessive Cold Risk mainly at night.
Wednesday...
Limited Snow Risk.

DISCUSSION...

Accumulating snow will continue on Sunday, especially southeast of
a Peru to Waukegan, Illinois line. Several inches of fluffy snow
will likely lead to hazardous travel conditions.

Another period of bitterly cold conditions is expected late Sunday
night into Monday morning.

Extensive ice cover on area rivers may cause localized ice jam
flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

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URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
158 AM CST Sat Jan 24 2026

ILZ003>006-008-010>013-019>021-023-032-103-105>108-241800-
/O.EXT.KLOT.CW.Y.0002.000000T0000Z-260124T1800Z/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La
Salle-Kendall-Grundy-Kankakee-Livingston-Northern Cook-Southern
Cook-Northern Will-Southern Will-Eastern Will-
Including the cities of Buffalo Grove, Lombard, Gurnee, Sycamore,
Joliet, Manhattan, Woodstock, Naperville, Fairbury, Minooka,
Rockford, La Salle, Bolingbrook, Orland Park, Park Forest,
Belvidere, Byron, Downers Grove, Dwight, Des Plaines, Aurora,
Wheaton, Wilmington, Crete, Oswego, Morris, Rochelle, Kankakee,
Schaumburg, Pontiac, Channahon, McHenry, Mokena, Yorkville,
Streator, Bourbonnais, Plainfield, Palatine, Beecher, Waukegan,
Coal City, Calumet City, Plano, Lemont, Carol Stream, Mundelein,
Ottawa, Crystal Lake, Mendota, Bradley, Peotone, Elgin,
Northbrook, DeKalb, Marseilles, Evanston, Algonquin, Dixon, Oak
Forest, and Oregon
158 AM CST Sat Jan 24 2026



* WHAT...Very cold wind chills as low as 25 to 30 below this morning.

* WHERE...Portions of central, north central, and northeast Illinois.

* WHEN...Until noon CST today.

* IMPACTS...The dangerously cold wind chills as low as 25 to 30
below zero could cause frostbite on exposed skin in as little as
30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Dress in layers including a hat, face mask, and gloves if you must
go outside.

To prevent water pipes from freezing; wrap or drain or allow them to
drip slowly.

Keep pets indoors as much as possible.

Make frequent checks on older family, friends, and neighbors.

---

URGENT - WINTER WEATHER MESSAGE
National Weather Service Chicago IL
151 AM CST Sat Jan 24 2026

ILZ006-103-104-241800-
/O.NEW.KLOT.WW.Y.0005.260125T0000Z-260126T0000Z/
Lake IL-Northern Cook-Central Cook-
Including the cities of Waukegan, Schaumburg, Oak Lawn, Oak Park,
La Grange, Gurnee, Mundelein, Des Plaines, Cicero, Buffalo Grove,
Northbrook, Chicago, Evanston, and Palatine
151 AM CST Sat Jan 24 2026


CST SUNDAY...

* WHAT...Snow expected. Total snow accumulations between 2 and 6
inches, highest within a few miles of the lakeshore. Lower snow
totals are forecasted across western portions of Lake and northern
Cook counties.

* WHERE...Central Cook, Lake IL, and Northern Cook Counties.

* WHEN...From 6 PM this evening to 6 PM CST Sunday.

* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while
driving. If you are going outside, watch your first few steps taken
on stairs, sidewalks, and driveways. These surfaces could be icy and
slippery, increasing your risk of a fall and injury.

During lake effect snow, the weather can vary from bands of locally
heavy snow to dry weather just a few miles away. Visibilities can
also vary greatly. Be prepared for rapid changes in weather,
visibility, and road conditions.