November 9-10, 2025: Lake Effect Snow Event

Event Summary Graphic

Overview
Snowfall
Radar
Additional Info

Overview

An early season lake effect snow event brought locally significant snow accumulations (as high as about 1 foot) to portions of northeast Illinois and northwest Indiana.

The peak of the lake effect snow event took place between the late evening of Sunday, November 9 and the early afternoon of Monday, November 10. Prior to the arrival of the more intense lake effect snow bands, light snow accumulations (partially produced by an initial band of lake effect snow) were observed during the morning of November 9.

Snowfall rates in excess of 2 inches per hour accompanied the most intense snow bands, particularly across portions of Lake and Porter counties in Indiana and Kankakee and Lake counties in Illinois.

There were several reports of thundersnow near Lake Michigan during the early morning hours of Monday, November 10.

An unexpected separation between the two primary bands of intense lake effect snow resulted in a local minima in snowfall over Chicago and adjacent suburbs.

Official Snowfall Totals

Chicago O'Hare International Airport: 1.7".

Rockford International Airport: Trace.

3 miles SW of Chicago Midway International Airport: 2.5".

NWS Chicago Office in Romeoville: 1.7".

Snowfall

Interactive Map of Latest Snowfall Local Storm Reports

Preliminary Local Storm Report...Summary
National Weather Service Chicago IL
1253 PM CST Mon Nov 10 2025

***Additional updated totals on 11/11 in the next section***

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1200 PM     Snow             Cedar Lake              41.36N 87.44W
11/10/2025  M12.3 Inch       Lake               IN   Public

            Storm total snow. Relayed via social media.

0400 AM     Snow             Momence                 41.16N 87.66W
11/10/2025  E12.0 Inch       Kankakee           IL   Broadcast Media

            Photo relayed by broadcast media. Snowfall
            since approximately 10 PM with a duration of
            roughly 6 hours.

0600 AM     Snow             2 NNW Cedar Lake        41.39N 87.46W
11/10/2025  M11.3 Inch       Lake               IN   Cocorahs

            Cocorahs station IN-LK-109 Cedar Lake 1.4
            NW.

0700 AM     Snow             3 SSE St. John          41.42N 87.44W
11/10/2025  M10.5 Inch       Lake               IN   Cocorahs

            Cocorahs station IN-LK-99 St. John 3 SSE.

0417 AM     Snow             Lowell                  41.29N 87.42W
11/10/2025  M10.0 Inch       Lake               IN   Public

            Relayed via broadcast media.

0529 AM     Snow             Crown Point             41.42N 87.37W
11/10/2025  E10.0 Inch       Lake               IN   Public

            Photo shared on social media with ruler
            shows approximately 10 inches of snow on the
            ground.

0600 AM     Snow             Winthrop Harbor         42.48N 87.82W
11/10/2025  M10.0 Inch       Lake               IL   Public



0708 AM     Snow             4 SW Lake Village       41.10N 87.50W
11/10/2025  M10.0 Inch       Newton             IN   Public



1230 AM     Snow             3 N Valparaiso          41.52N 87.06W
11/10/2025  M9.5 Inch        Porter             IN   Public

            Total snowfall since midnight 11/9.
            Approximately 6 inches of snow has fallen
            since 10:30 PM.

0654 AM     Snow             1 N Valparaiso          41.49N 87.06W
11/10/2025  M9.5 Inch        Porter             IN   Cocorahs

            Cocorahs station IN-PT-98 Valparaiso 1 N.

0500 AM     Snow             Beaverville             40.95N 87.66W
11/10/2025  E9.0 Inch        Iroquois           IL   Broadcast Media

            Relayed via broadcast media.

0600 AM     Snow             1 WSW Valparaiso        41.47N 87.09W
11/10/2025  M8.0 Inch        Porter             IN   Cocorahs

            Cocorahs station IN-PT-3 Valparaiso.

0600 AM     Snow             2 N Crescent City       40.80N 87.86W
11/10/2025  M7.6 Inch        Iroquois           IL   Cocorahs

            Cocorahs station IL-IR-14 Crescent City 2 N.

0350 AM     Snow             Hobart                  41.53N 87.25W
11/10/2025  M6.5 Inch        Lake               IN   Public

            24 hour snowfall total.

0600 AM     Snow             1 NNW DeMotte           41.21N 87.21W
11/10/2025  M6.5 Inch        Jasper             IN   Cocorahs

            Cocorahs station IN-JS-37 DeMotte.

0600 AM     Snow             1 NNW DeMotte           41.21N 87.21W
11/10/2025  M6.5 Inch        Jasper             IN   Cocorahs

            Cocorahs station IN-JS-37 DeMotte.

0830 AM     Snow             1 SSE Wadsworth         42.42N 87.92W
11/10/2025  M6.5 Inch        Lake               IL   Cocorahs

            Cocorahs station IL-LK-120 Wadsworth 1.4 S.

0700 AM     Snow             3 S Sauk Village        41.45N 87.57W
11/10/2025  M6.1 Inch        Will               IL   Cocorahs

            Cocorahs station IL-WL-25 Crete 3 E.

0930 AM     Snow             Highland                41.55N 87.46W
11/10/2025  M5.8 Inch        Lake               IN   Public



0600 AM     Snow             Ogden Dunes             41.62N 87.20W
11/10/2025  M5.5 Inch        Porter             IN   Cocorahs

            Cocorahs station IN-PT-157 Ogden Dunes.

0700 AM     Snow             Porter                  41.62N 87.08W
11/10/2025  M5.5 Inch        Porter             IN   Cocorahs

            Cocorahs station IN-PT-69 Porter.

0800 AM     Snow             2 WSW Goodenow          41.38N 87.68W
11/10/2025  M5.5 Inch        Will               IL   Cocorahs

            Cocorahs station IL-WL-149 Monee 5 SE.

0600 AM     Snow             2 WSW Kankakee          41.11N 87.89W
11/10/2025  M5.4 Inch        Kankakee           IL   Cocorahs

            Cocorahs station IL-KK-45 Kankakee 1.4 WSW.

0808 AM     Snow             1 NNE Mundelein         42.27N 88.00W
11/10/2025  M5.1 Inch        Lake               IL   Cocorahs

            Cocorahs station IL-LK-54 Mundelein 1 NNE.

0545 AM     Snow             Watseka                 40.78N 87.73W
11/10/2025  E5.0 Inch        Iroquois           IL   Public

            Relayed via broadcast media.

0700 AM     Snow             Gurnee                  42.38N 87.94W
11/10/2025  M5.0 Inch        Lake               IL   Broadcast Media



0757 AM     Snow             1 SE Villa Park         41.88N 87.97W
11/10/2025  M5.0 Inch        DuPage             IL   Public



0700 AM     Snow             1 N Lynwood             41.54N 87.54W
11/10/2025  M4.0 Inch        Cook               IL   CO-OP Observer

            CO-OP Observer station LNSI2 Lansing.

0700 AM     Snow             4 NNE Boone Grove       41.41N 87.10W
11/10/2025  M4.0 Inch        Porter             IN   Cocorahs

            Cocorahs station IN-PT-117 Boone Grove 4
            NNE.

0700 AM     Snow             West Ridge - Chicago    42.00N 87.69W
11/10/2025  M3.5 Inch        Cook               IL   Cocorahs

            Cocorahs station IL-CK-214 Chicago - West
            Ridge.

0800 AM     Snow             2 WNW Mundelein         42.27N 88.03W
11/10/2025  M3.5 Inch        Lake               IL   Cocorahs

            Cocorahs station IL-LK-74 Mundelein 1.6 WNW.

1109 AM     Snow             1 NNW Edgewater - Chica 42.00N 87.67W
11/10/2025  M3.5 Inch        Cook               IL   Public

            Relayed via social media.

0600 AM     Snow             Paxton                  40.46N 88.10W
11/10/2025  M3.4 Inch        Ford               IL   Emergency Mngr



0800 AM     Snow             1 E Evanston            42.04N 87.68W
11/10/2025  M3.3 Inch        Cook               IL   Cocorahs

            Cocorahs station IL-CK-336 Evanston 1 E.

1038 AM     Snow             1 SW Posen              41.62N 87.69W
11/10/2025  M3.0 Inch        Cook               IL   Public



0700 AM     Snow             1 W Peotone             41.33N 87.80W
11/10/2025  M2.7 Inch        Will               IL   CO-OP Observer

            CO-OP Observer station PEOI2 Peotone.

0700 AM     Snow             2 N Buffalo Grove       42.19N 87.96W
11/10/2025  M2.6 Inch        Lake               IL   Cocorahs

            Cocorahs station IL-LK-16 Buffalo Grove 2 N.

0700 AM     Snow             Hometown                41.73N 87.73W
11/10/2025  M2.6 Inch        Cook               IL   Cocorahs

            Cocorahs station IL-CK-455 Hometown.

0600 AM     Snow             3.0 SW Midway Airport   41.74N 87.78W
11/10/2025  M2.5 Inch        Cook               IL   CO-OP Observer

            12 hour snowfall.

0635 AM     Snow             1 NNE Oak Park          41.91N 87.78W
11/10/2025  M2.5 Inch        Cook               IL   Cocorahs

            Cocorahs station IL-CK-74 Oak Park 1 NNE.

0700 AM     Snow             1 NNE Park Forest       41.49N 87.68W
11/10/2025  M2.2 Inch        Cook               IL   Cocorahs

            Cocorahs station IL-CK-69 Park Forest 1 NNE.

0700 AM     Snow             Joliet                  41.53N 88.08W
11/10/2025  M2.1 Inch        Will               IL   Trained Spotter

            Storm total snowfall. Relayed via social
            media.

0500 AM     Snow             4 SW Kentland           40.73N 87.49W
11/10/2025  M2.0 Inch        Benton             IN   Cocorahs

            Cocorahs station IN-BT-11 Earl Park 5.0 NW.

0615 AM     Snow             Mount Prospect          42.07N 87.94W
11/10/2025  M1.8 Inch        Cook               IL   Cocorahs

            Cocorahs station IL-CK-367 Mount Prospect
            0.2 NNE.

0700 AM     Snow             2 WSW Palos Park        41.65N 87.86W
11/10/2025  M1.8 Inch        Cook               IL   Cocorahs

            Cocorahs station IL-CK-50 Palos Park 2 WSW.

0600 AM     Snow             Ohare Airport           41.98N 87.90W
11/10/2025  M1.6 Inch        Cook               IL   Official NWS Obs

            Corrects previous snow report from Ohare
            Airport. 12 hour snowfall.

0600 AM     Snow             NWS Chicago-Romeoville  41.60N 88.08W
11/10/2025  M1.5 Inch        Will               IL   Official NWS Obs

            12 hour snowfall.

0700 AM     Snow             1 SE Elmhurst           41.89N 87.93W
11/10/2025  M1.5 Inch        DuPage             IL   Cocorahs

            Cocorahs station IL-DP-109 Elmhurst 0.8 ESE.


&&

Preliminary Local Storm Report
National Weather Service Chicago IL
1243 PM CST Tue Nov 11 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0700 PM     Snow             1 N Valparaiso          41.49N 87.06W
11/10/2025  M12.0 Inch       Porter             IN   Cocorahs         

            Updated storm total snowfall. Cocorahs 
            station IN-PT-98 Valparaiso 1 N. 

0700 PM     Snow             2 WNW Boone Grove       41.37N 87.16W
11/10/2025  M11.5 Inch       Porter             IN   Cocorahs         

            Updated storm total snowfall. Cocorahs 
            station IN-PT-18 Boone Grove 2 WNW. 

0700 PM     Snow             1 WSW Valparaiso        41.47N 87.09W
11/10/2025  M11.0 Inch       Porter             IN   Cocorahs         

            Updated storm total snowfall. Cocorahs 
            station IN-PT-3 Valparaiso. 

0700 PM     Snow             4 NNE Boone Grove       41.41N 87.10W
11/10/2025  M9.0 Inch        Porter             IN   Cocorahs         

            Updated storm total snowfall. Cocorahs 
            station IN-PT-117 Boone Grove 4 NNE. 

0700 PM     Snow             Porter                  41.62N 87.08W
11/10/2025  M8.3 Inch        Porter             IN   Cocorahs         

            Updated storm total snowfall. Cocorahs 
            station IN-PT-69 Porter. 

0700 PM     Snow             2 N Crescent City       40.80N 87.86W
11/10/2025  M8.1 Inch        Iroquois           IL   Cocorahs         

            Updated storm total snowfall. Cocorahs 
            station IL-IR-14 Crescent City 2 N. 

0700 PM     Snow             3 NNW Lake Station      41.62N 87.25W
11/10/2025  M7.6 Inch        Lake               IN   Cocorahs         

            Updated storm total snowfall. Cocorahs 
            station IN-LK-63 Gary 5 ENE. 

1200 PM     Snow             West Ridge - Chicago    42.00N 87.70W
11/10/2025  M5.7 Inch        Cook               IL   Cocorahs         

            Updated storm total snowfall. Cocorahs 
            station IL-CK-94 Chicago - West Ridge. 

1200 PM     Snow             1 E Evanston            42.04N 87.68W
11/10/2025  M5.2 Inch        Cook               IL   Cocorahs         

            Updated storm total snowfall. Cocorahs 
            station IL-CK-336 Evanston 1 E.

&&

Radar

Radar loop from 6:30 PM CST Sunday, November 9 through 2:30 PM CST Monday, November 10.

Click here for an interactive version of this loop (courtesy of the Iowa Environmental Mesonet).

Additional Information

Photos


Beach Park, IL. Photo courtesy of Michael Needham.	Portage, IN. Photo courtesy of INDOT.	Cedar Lake, IN. Photo courtesy of Kevin Paluch.

Links

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Additional event recaps can be found on the NWS Chicago Science & Past Events Page.

Areas of Severe Thunderstorms Monday

November 9-10, 2025: Lake Effect Snow Event