January 19, 2021: Intense Evening Snow Squall Impacts Parts of Chicago Metro

News Headlines

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Radar Loop from 8:08 PM to 10:21 PM CST 1/19

KLOT Radar Loop and Snowfall Reports

Fast Facts
Snow/Ice Totals
Storm Reports
Additional

Fast Facts

An intense snow squall associated with an Alberta clipper rushed through northeast Illinois during the evening hours.

Snowfall amounts ranged from 1-4" in a narrow band from Boone County to Cook County to parts of northwest Indiana.

Official snowfall total for Chicago, at O'Hare International Airport, was 1.5" with the snow squall and 1.7" total for January 19th.

Highest amount reported from a volunteer observer was 3.4" in Bull Valley (east central McHenry County).

Snow/Ice Totals

Snowfall Map as of the Morning of Wednesday January 20th

Text Listing of Snowfall Reports from Volunteer Observers

Storm Reports

Map of Snowfall Local Storm Reports

    
                        

163

NWUS53 KLOT 170149

LSRLOT



Preliminary Local Storm Report

National Weather Service Chicago IL

849 PM CDT Mon Mar 16 2026



..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...

..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....

            ..REMARKS..



0700 AM     Snow             1 SW Timberlane         42.32N 88.88W

03/16/2026  M6.6 Inch        Boone              IL   Cocorahs



            Cocorahs station IL-BN-19 Timberlane 1 SW.



0700 AM     Snow             4 NNE Harvard           42.48N 88.58W

03/16/2026  M6.0 Inch        McHenry            IL   Cocorahs



            Cocorahs station IL-MCH-103 Harvard 4.4 NNE.



0700 AM     Snow             Marengo                 42.26N 88.60W

03/16/2026  M6.0 Inch        McHenry            IL   Cocorahs



            Cocorahs station IL-MCH-87 Marengo.



0700 AM     Snow             Capron                  42.40N 88.74W

03/16/2026  M5.8 Inch        Boone              IL   Cocorahs



            Cocorahs station IL-BN-14 Capron.



0830 AM     Snow             1 ESE Spring Grove      42.44N 88.22W

03/16/2026  M5.7 Inch        McHenry            IL   Cocorahs



            Cocorahs station IL-MCH-108 Spring Grove 1.2

            ESE.



0100 PM     Snow             Rockford Airport        42.20N 89.10W

03/16/2026  M5.7 Inch        Winnebago          IL   Official NWS Obs



            Storm total snowfall.



0800 AM     Snow             1 SSW Genoa             42.08N 88.71W

03/16/2026  M4.6 Inch        De Kalb            IL   CO-OP Observer



            CO-OP Observer station GEOI2 Genoa.



0700 AM     Snow             5 NW Woodstock          42.36N 88.53W

03/16/2026  M4.5 Inch        McHenry            IL   CO-OP Observer



            CO-OP Observer station WODI2 Woodstock 5 NW.



0700 AM     Snow             1 SW DeKalb             41.92N 88.76W

03/16/2026  M4.0 Inch        De Kalb            IL   Cocorahs



            Cocorahs station IL-DK-28 DeKalb.



0700 AM     Snow             4 SSW Woodstock         42.26N 88.46W

03/16/2026  M3.8 Inch        McHenry            IL   CO-OP Observer



            CO-OP Observer station CRYI2 Crystal Lake 4

            NW.



0700 AM     Snow             1 NNE Palatine          42.13N 88.03W

03/16/2026  M3.0 Inch        Cook               IL   Cocorahs



            Cocorahs station IL-CK-294 Palatine 1 NNE.



0700 AM     Snow             3 S Steward             41.81N 89.02W

03/16/2026  M3.0 Inch        Lee                IL   CO-OP Observer



            CO-OP Observer station STWI2 Steward 3 S.



0700 AM     Snow             2 N Elgin               42.06N 88.29W

03/16/2026  M2.5 Inch        Kane               IL   CO-OP Observer



            CO-OP Observer station ELGI2 Elgin.



0730 AM     Snow             2 W Naplate             41.33N 88.91W

03/16/2026  M2.5 Inch        La Salle           IL   CO-OP Observer



            CO-OP Observer station OTTI2 Ottawa -

            Buffalo Rock SP.



0700 PM     Snow             NWS Chicago-Romeoville  41.60N 88.08W

03/16/2026  M2.5 Inch        Will               IL   Official NWS Obs



            Storm total snowfall.



0530 AM     Snow             Maple Park              41.91N 88.59W

03/16/2026  M2.3 Inch        Kane               IL   Cocorahs



            Cocorahs station IL-KN-125 Maple Park.



0700 AM     Snow             2 SSE Yorkville         41.62N 88.43W

03/16/2026  M2.1 Inch        Kendall            IL   Cocorahs



            Cocorahs station IL-KD-142 Yorkville 1.7

            SSE.



1200 PM     Snow             2 NNE Lisle             41.83N 88.06W

03/16/2026  M1.5 Inch        DuPage             IL   CO-OP Observer



            CO-OP Observer station GLEI2 Glen Ellyn 4S.



0700 AM     Snow             2 NNW Dwight            41.12N 88.45W

03/16/2026  M1.4 Inch        Grundy             IL   Cocorahs



            Cocorahs station IL-GY-38 Dwight 2.2 NNW.



0100 PM     Snow             Ohare Airport           41.98N 87.90W

03/16/2026  M1.3 Inch        Cook               IL   Official NWS Obs



            Storm total snowfall.





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