January 30-31, 2021: Significant Snowfall Event for Northern Illinois and Northwest Indiana

Fast Facts

• Widespread snowfall of 6" to 13" was observed across northern Illinois and northwest Indiana from the afternoon of January 30 through the early evening of January 31 (a 24-30 hour event). This heavy snowfall was produced by a potent weather system, that in particular had a significant amount of moisture for heavy snowfall rates. The system also slowed as it moved over the area, resulting in persistent snow including lake enhanced snow on January 31. This weather system continued eastward, bringing significant snowfall to portions of the Mid-Atlantic and Northeast on February 1-2.

• Road conditions were widespread hazardous to even dangerous on the night of January 30 into the early morning of January 31. This resulted in numerous auto accidents or slide-offs, relayed through partners and the public to us in the NWS.

• The official event snowfall for Chicago was 10.8" observed at Chicago O'Hare International Airport. Facts about this:
  • Largest snowfall event total in five years, since November 20-21, 2015 (11.2")
  • Second 6+" snow event in a week; the last time two in a week of 6+" occurred was early January of 2014
  • The 16.8" from January 25-31 was the snowiest week in six years, since February 1-7, 2015 (19.9")
• The official event snowfall for Rockford was 6.8" observed at Chicago Rockford International Airport.

• Other event snowfall amounts included 12.9" at the NWS Chicago in Romeoville and 11.3" observed 3 miles southwest of Chicago Midway International Airport.

• Heavy snowfall rates were key in this event, with rates of 1+" per hour for several hours during mid-evening January 30th into the early overnight. This was highlighted by Chicago O'Hare being 1/4 to 1/2SM visibility in moderate to heavy snow for five straight hours, which is rare to see such a duration!

Chicago O'Hare observations during heaviest snow.

Snow Totals

Map of final snowfall totals for the area

The below listing is sorted by magnitude. To see a listing sorted by location, see here.

Public Information Statement
National Weather Service Chicago IL
407 PM CST Mon Feb 1 2021

...STORM TOTAL SNOWFALL FROM JANUARY 30-31 2021 SORTED BY MAGNITUDE...

Location                     Amount    Time/Date       Provider
---------------------------------------------------------------
Monee 5 SE                   15.3 in   0800 AM 02/01   COCORAHS
Harwood Heights              13.8 in   0700 AM 02/01   COCORAHS
Elmhurst 1 SE                13.5 in   0700 AM 02/01   COCORAHS
Crete 3 E                    13.4 in   0700 AM 02/01   COCORAHS
Romeoville - NWS Chicago     12.9 in   0600 AM 02/01   Official NWS Obs
Downers Grove 1 NNW          12.7 in   0659 AM 02/01   COCORAHS
Thornton                     12.7 in   1100 PM 01/31   Trained Spotter
Peotone                      12.7 in   0655 PM 01/31   Trained Spotter
St. John 3 SSE               12.5 in   0700 AM 02/01   COCORAHS
Evanston 1 E                 12.4 in   0800 AM 02/01   COCORAHS
Peotone                      12.4 in   0700 AM 02/01   COOP
1 NNW Downers Grove          12.4 in   0600 PM 01/31   Cocorahs
Dyer                         12.1 in   0700 AM 02/01   COCORAHS
Morton Grove                 12.1 in   0730 PM 01/31   Broadcast Media
Forest Park 1 ENE            12.0 in   0700 AM 02/01   COCORAHS
Berwyn                       12.0 in   1200 AM 02/01   Public
Deerfield                    12.0 in   0500 PM 01/31   Public
Highwood                     11.8 in   0600 AM 02/01   COCORAHS
Park Forest 1 NNE            11.7 in   0700 AM 02/01   COCORAHS
Chicago - West Ridge         11.5 in   0700 AM 02/01   COCORAHS
Homer Glen 1 NNE             11.5 in   0600 AM 02/01   COCORAHS
Flossmoor                    11.5 in   0709 PM 01/31   Trained Spotter
Mokena 1 W                   11.4 in   0700 AM 02/01   COCORAHS
Roselle 1 NNW                11.4 in   0700 AM 02/01   COCORAHS
Lindenhurst 1 NNW            11.4 in   0700 AM 02/01   COCORAHS
Mokena                       11.4 in   1200 AM 02/01   Trained Spotter
1 NNW Lindenhurst            11.4 in   0930 PM 01/31   Cocorahs
1 NNW Roselle                11.4 in   0600 PM 01/31   Cocorahs
Long Lake                    11.3 in   0800 AM 02/01   COCORAHS
Midway 3 SW COOP             11.3 in   1200 AM 02/01   COOP
Riverwoods 1 NE              11.2 in   0700 AM 02/01   COCORAHS
Grandwood Park 1 SE          11.2 in   0700 AM 02/01   COCORAHS
St. John                     11.2 in   0600 AM 02/01   COCORAHS
DeMotte                      11.2 in   0600 AM 02/01   COCORAHS
Homewood                     11.1 in   0700 AM 02/01   COCORAHS
Algonquin 1 NNW              11.1 in   0615 AM 02/01   COCORAHS
Franklin Park 0.5 SSE        11.0 in   0800 AM 02/01   COCORAHS
Mokena 2 WSW                 11.0 in   0700 AM 02/01   COCORAHS
Lockport 2 SE                11.0 in   0700 AM 02/01   COCORAHS
Glen Ellyn 1 W               11.0 in   0700 AM 02/01   COCORAHS
Lansing                      11.0 in   1200 AM 02/01   CO-OP Observer
Morgan Park - Chicago        11.0 in   1000 PM 01/31   Public
2 N Homer Glen               11.0 in   0520 PM 01/31   Public
2 ENE Manhattan              11.0 in   0430 PM 01/31   Public
Crown Point 2 NNE            10.9 in   0800 AM 02/01   COCORAHS
Darien 2 SE                  10.9 in   0715 AM 02/01   COCORAHS
Glen Ellyn 1 SW              10.8 in   0800 AM 02/01   COCORAHS
Ohare Airport                10.8 in   1200 AM 02/01   Official NWS Obs
1 SW Medinah                 10.8 in   0800 PM 01/31   Cocorahs
Joliet                       10.7 in   0500 PM 01/31   Trained Spotter
1 NW Lowell                  10.6 in   0457 PM 01/31   Public
Oak Lawn                     10.5 in   0845 AM 02/01   COCORAHS
Bolingbrook 3 NE             10.5 in   0700 AM 02/01   COCORAHS
Libertyville                 10.5 in   0900 PM 01/31   Trained Spotter
Dyer                         10.5 in   0800 PM 01/31   Public
Oak Lawn                     10.5 in   0515 PM 01/31   Public
1 WNW Woodridge              10.5 in   0415 PM 01/31   NWS Employee
Rensselaer 2 SW              10.4 in   0730 AM 02/01   COOP
Munster 1.5 NNW              10.4 in   0715 AM 02/01   COCORAHS
Buffalo Grove 2 N            10.4 in   0700 AM 02/01   COCORAHS
1 SW Kankakee                10.3 in   0900 AM 02/01   Trained Spotter
Mundelein 1 NNE              10.3 in   0800 AM 02/01   COCORAHS
1 ESE Schaumburg             10.3 in   0630 PM 01/31   Cocorahs
Park Forest 1 WNW            10.0 in   0730 AM 02/01   COCORAHS
Plainfield 4 SW              10.0 in   0700 AM 02/01   COCORAHS
Naperville                   10.0 in   0600 AM 02/01   COCORAHS
Somonauk 2 NE                10.0 in   0500 AM 02/01   COCORAHS
DeKalb                       9.8 in    0700 AM 02/01   COOP
Park Ridge 1 SSW             9.8 in    0700 AM 02/01   COCORAHS
Antioch                      9.8 in    0930 PM 01/31   Public
Oak Lawn 2 WNW               9.6 in    0800 AM 02/01   COCORAHS
Richmond                     9.5 in    0900 AM 02/01   Public
Barrington                   9.5 in    0800 AM 02/01   COOP
Wheatfield 3 SSE             9.5 in    0700 AM 02/01   COCORAHS
Lisle 1 WSW                  9.5 in    0700 AM 02/01   COCORAHS
Elk Grove Village 1 ESE      9.5 in    0600 AM 02/01   COCORAHS
Countryside 1 ENE            9.5 in    0500 AM 02/01   COCORAHS
Kentland                     9.5 in    0830 PM 01/31   Public
Cedar Lake 2 S               9.3 in    0800 AM 02/01   COCORAHS
Waukegan 2 N                 9.1 in    0800 AM 02/01   COCORAHS
Elk Grove Village 2 WSW      9.1 in    0645 AM 02/01   COCORAHS
Remington                    9.0 in    0745 AM 02/01   COCORAHS
Palos Park 2 WSW             9.0 in    0700 AM 02/01   COCORAHS
Oak Forest 1 NNW             9.0 in    0700 AM 02/01   COCORAHS
Trout Valley                 9.0 in    0700 AM 02/01   COCORAHS
De Motte 6 S                 9.0 in    0700 AM 02/01   COCORAHS
Morton Arboretum             9.0 in    0700 AM 02/01   COOP
Collegeville                 9.0 in    0600 AM 02/01   COCORAHS
Boone Grove 4 NNE            9.0 in    0600 AM 02/01   COCORAHS
Kouts                        9.0 in    0650 PM 01/31   Public
1 N Medinah                  9.0 in    0500 PM 01/31   Cocorahs
St. Charles 1 ENE            8.8 in    0800 AM 02/01   COCORAHS
Joliet 2 N                   8.7 in    0700 AM 02/01   UCOOP
1 ENE Chicago Loop           8.6 in    0800 PM 01/31   Broadcast Media
Bridgeview 1 WNW             8.5 in    0730 AM 02/01   COCORAHS
La Grange Park 1 SSW         8.5 in    0700 AM 02/01   COCORAHS
Aurora                       8.5 in    0700 AM 02/01   COOP
St. Anne                     8.4 in    0700 AM 02/01   COOP
Valparaiso 1 N               8.4 in    0553 AM 02/01   COCORAHS
1 ENE St. Charles            8.4 in    0519 PM 01/31   Trained Spotter
Hoffman Estates              8.3 in    0700 AM 02/01   COCORAHS
Boone Grove 2 WNW            8.3 in    0700 AM 02/01   COCORAHS
Palatine 1 E                 8.2 in    0315 AM 02/01   COCORAHS
West Chicago 4 SE            8.0 in    0713 AM 02/01   COCORAHS
Elmhurst 1 SW                8.0 in    0700 AM 02/01   COCORAHS
Timberlane 1 SW              8.0 in    0700 AM 02/01   COCORAHS
Woodstock 5 NW               7.9 in    0700 AM 02/01   COOP
Chesterton                   7.8 in    1000 AM 02/01   Storm Chaser
Mount Ayr 2 NNE              7.8 in    0830 AM 02/01   COCORAHS
Bourbonnais                  7.8 in    0700 AM 02/01   COOP
Sycamore                     7.8 in    0700 AM 02/01   COCORAHS
Lake Summerset               7.8 in    0740 PM 01/31   Public
Naperville 5 SSW             7.7 in    0700 AM 02/01   COCORAHS
Cortland                     7.7 in    0700 AM 02/01   COCORAHS
Crystal Lake 1 WSW           7.6 in    0700 AM 02/01   COCORAHS
Ogden Dunes                  7.6 in    0600 AM 02/01   COCORAHS
Palatine 1 NNE               7.5 in    0700 AM 02/01   COCORAHS
Chesterton 4 ESE             7.5 in    0700 AM 02/01   COCORAHS
Rockford 2 ENE               7.4 in    0900 AM 02/01   COCORAHS
Coal City 4 NNW              7.4 in    0700 AM 02/01   UCOOP
Gary 5 ENE                   7.4 in    0700 AM 02/01   COCORAHS
Porter                       7.2 in    0700 AM 02/01   COCORAHS
Elgin 3 W                    7.1 in    0700 AM 02/01   COCORAHS
Dwight                       7.0 in    0700 AM 02/01   COOP
Elgin                        7.0 in    0700 AM 02/01   COOP
Harvard                      7.0 in    0700 AM 02/01   COOP
Pecatonica                   7.0 in    0530 PM 01/31   Public
New Milford                  7.0 in    0526 PM 01/31   Public
Valparaiso 2 NNW             6.9 in    0850 AM 02/01   COCORAHS
Carbon Hill 3 NNW            6.9 in    0700 AM 02/01   COCORAHS
Ashkum 6 E                   6.8 in    0700 AM 02/01   COCORAHS
Rockford Airport             6.8 in    1200 AM 02/01   Official NWS Obs
Carbon Hill 3 NW             6.5 in    0800 AM 02/01   COCORAHS
West Chicago 4 NNE           6.5 in    0700 AM 02/01   COCORAHS
South Beloit                 6.5 in    0526 PM 01/31   Public
Plainfield 4 NNW             6.4 in    0700 AM 02/01   COCORAHS
Geneva 1 SSW                 6.3 in    0730 AM 02/01   COCORAHS
4 NNW Rockford               6.3 in    0700 AM 02/01   COCORAHS
Boulder Hill 1 NNE           6.3 in    0700 AM 02/01   COCORAHS
Batavia                      6.3 in    0600 AM 02/01   UCOOP
Hebron 2 WSW                 6.1 in    0700 AM 02/01   UCOOP
Valparaiso 4 SW              6.1 in    0600 AM 02/01   COCORAHS
McHenry 1 ENE                6.0 in    0900 AM 02/01   COCORAHS
Aurora 4 ESE                 6.0 in    0700 AM 02/01   COCORAHS
Capron                       6.0 in    0700 AM 02/01   COCORAHS
2 SW Rockford                6.0 in    0526 PM 01/31   Public
Geneva                       5.2 in    0700 AM 02/01   COCORAHS
Geneva 2 WNW                 5.1 in    0700 AM 02/01   COCORAHS
Crescent City 2 N            4.3 in    0600 AM 02/01   COCORAHS
Earlville 3 S                4.2 in    0600 AM 02/01   COOP
Ashton                       4.1 in    0710 AM 02/01   COCORAHS
Chatsworth                   4.0 in    0500 PM 01/31   CO-OP Observer
Fairbury                     3.2 in    0700 AM 02/01   COOP
Gilman                       2.0 in    0830 PM 01/31   Public
Gibson City                  1.5 in    0830 PM 01/31   Public
1 N Milford                  1.5 in    0830 PM 01/31   Public

Observations are collected from a variety of sources with varying
equipment and exposures. We thank all volunteer weather observers
for their dedication. Not all data listed are considered official.

$$

Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO IL
400 PM CST MON FEB 1 2021

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

1000 AM     HEAVY SNOW       CHESTERTON              41.61N 87.06W
02/01/2021  M7.8 INCH        PORTER             IN   STORM CHASER

            2-DAY TOTAL.

0900 AM     HEAVY SNOW       1 SW KANKAKEE           41.11N 87.87W
02/01/2021  M10.3 INCH       KANKAKEE           IL   TRAINED SPOTTER

            2-DAY TOTAL.

0900 AM     HEAVY SNOW       RICHMOND                42.48N 88.31W
02/01/2021  M9.5 INCH        MCHENRY            IL   PUBLIC

            2-DAY TOTAL. RELAYED VIA BROADCAST MEDIA.

0900 AM     HEAVY SNOW       3 SSE LOVES PARK        42.28N 89.04W
02/01/2021  M7.4 INCH        WINNEBAGO          IL   COCORAHS

            COCORAHS STATION IL-WN-26 ROCKFORD 2 ENE.

0900 AM     HEAVY SNOW       1 ENE MCHENRY           42.35N 88.25W
02/01/2021  M6.0 INCH        MCHENRY            IL   COCORAHS

            COCORAHS STATION IL-MCH-94 MCHENRY 1 ENE.

0850 AM     HEAVY SNOW       2 NNW VALPARAISO        41.50N 87.07W
02/01/2021  M6.9 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-63 VALPARAISO 2 NNW.

0845 AM     HEAVY SNOW       OAK LAWN                41.71N 87.75W
02/01/2021  M10.5 INCH       COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-149 OAK LAWN.

0830 AM     HEAVY SNOW       2 NNE MOUNT AYR         40.97N 87.29W
02/01/2021  M7.8 INCH        NEWTON             IN   COCORAHS

            COCORAHS STATION IN-NW-1 MOUNT AYR 2 NNE.

0830 AM     HEAVY SNOW       LAKES OF THE FOUR SEASO 41.41N 87.21W
02/01/2021  M6.0 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-79 LAKES OF THE FOUR
            SEASONS.

0800 AM     HEAVY SNOW       2 WSW GOODENOW          41.38N 87.68W
02/01/2021  M15.3 INCH       WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-149 MONEE 5 SE.

0800 AM     HEAVY SNOW       1 E EVANSTON            42.04N 87.68W
02/01/2021  M12.4 INCH       COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-336 EVANSTON 1 E.

0800 AM     HEAVY SNOW       LONG LAKE               42.37N 88.12W
02/01/2021  M11.3 INCH       LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-100 LONG LAKE.

0800 AM     HEAVY SNOW       FRANKLIN PARK           41.93N 87.87W
02/01/2021  M11.0 INCH       COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-345 FRANKLIN PARK 0.5
            SSE.

0800 AM     HEAVY SNOW       2 NNE CROWN POINT       41.44N 87.35W
02/01/2021  M10.9 INCH       LAKE               IN   COCORAHS

            COCORAHS STATION IN-LK-26 CROWN POINT 2 NNE.

0800 AM     HEAVY SNOW       1 SW GLEN ELLYN         41.86N 88.08W
02/01/2021  M10.8 INCH       DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-155 GLEN ELLYN 1 SW.

0800 AM     HEAVY SNOW       1 NNE MUNDELEIN         42.27N 88.00W
02/01/2021  M10.3 INCH       LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-54 MUNDELEIN 1 NNE.

0800 AM     HEAVY SNOW       1 SSW BURBANK           41.73N 87.78W
02/01/2021  M9.6 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-211 OAK LAWN 2 WNW.

0800 AM     HEAVY SNOW       2 SSE BARRINGTON HILLS  42.12N 88.16W
02/01/2021  M9.5 INCH        COOK               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION BARI2 BARRINGTON.

0800 AM     HEAVY SNOW       2 S CEDAR LAKE          41.34N 87.44W
02/01/2021  M9.3 INCH        LAKE               IN   COCORAHS

            COCORAHS STATION IN-LK-107 CEDAR LAKE 2 S.

0800 AM     HEAVY SNOW       2 SSW BEACH PARK        42.40N 87.86W
02/01/2021  M9.1 INCH        LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-19 WAUKEGAN 2 N.

0800 AM     HEAVY SNOW       1 ENE ST. CHARLES       41.92N 88.30W
02/01/2021  M8.8 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-64 ST. CHARLES 1 ENE.

0800 AM     HEAVY SNOW       2 WNW BULL VALLEY       42.32N 88.39W
02/01/2021  M7.4 INCH        MCHENRY            IL   COCORAHS

            COCORAHS STATION IL-MCH-13 BULL VALLEY 2
            WNW.

0800 AM     HEAVY SNOW       3 NW CARBON HILL        41.33N 88.33W
02/01/2021  M6.5 INCH        GRUNDY             IL   COCORAHS

            COCORAHS STATION IL-GY-27 CARBON HILL 3 NW.

0745 AM     HEAVY SNOW       REMINGTON               40.77N 87.15W
02/01/2021  M9.0 INCH        JASPER             IN   COCORAHS

            COCORAHS STATION IN-JS-47 REMINGTON.

0730 AM     HEAVY SNOW       1 NW COLLEGEVILLE       40.92N 87.18W
02/01/2021  M10.4 INCH       JASPER             IN   CO-OP OBSERVER

            CO-OP OBSERVER STATION RZZI3 RENSSELAER 2
            SW.

0730 AM     HEAVY SNOW       1 WNW PARK FOREST       41.49N 87.70W
02/01/2021  M10.0 INCH       COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-320 PARK FOREST 1
            WNW.

0730 AM     HEAVY SNOW       1 WNW BRIDGEVIEW        41.76N 87.82W
02/01/2021  M8.5 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-12 BRIDGEVIEW 1 WNW.

0730 AM     HEAVY SNOW       1 NNW BATAVIA           41.86N 88.32W
02/01/2021  M6.3 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-78 GENEVA 1 SSW.

0715 AM     HEAVY SNOW       2 SE DARIEN             41.73N 87.95W
02/01/2021  M10.9 INCH       DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-79 DARIEN 2 SE.

0715 AM     HEAVY SNOW       1 SSW HAMMOND           41.57N 87.51W
02/01/2021  M10.4 INCH       LAKE               IN   COCORAHS

            COCORAHS STATION IN-LK-91 MUNSTER 1.5 NNW.

0713 AM     HEAVY SNOW       2 SW WINFIELD           41.85N 88.18W
02/01/2021  M8.0 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-164 WEST CHICAGO 4
            SE.

0710 AM     SNOW             ASHTON                  41.86N 89.23W
02/01/2021  M4.1 INCH        LEE                IL   COCORAHS

            COCORAHS STATION IL-LE-8 ASHTON.

0700 AM     HEAVY SNOW       HARWOOD HEIGHTS         41.97N 87.80W
02/01/2021  M13.8 INCH       COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-285 HARWOOD HEIGHTS.

0700 AM     HEAVY SNOW       1 SE ELMHURST           41.89N 87.93W
02/01/2021  M13.5 INCH       DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-109 ELMHURST 1 SE.

0700 AM     HEAVY SNOW       3 S SAUK VILLAGE        41.45N 87.57W
02/01/2021  M13.4 INCH       WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-25 CRETE 3 E.

0700 AM     HEAVY SNOW       3 SSE ST. JOHN          41.42N 87.44W
02/01/2021  M12.5 INCH       LAKE               IN   COCORAHS

            COCORAHS STATION IN-LK-99 ST. JOHN 3 SSE.

0700 AM     HEAVY SNOW       1 W PEOTONE             41.33N 87.80W
02/01/2021  M12.4 INCH       WILL               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION PEOI2 PEOTONE.

0700 AM     HEAVY SNOW       1 WNW DYER              41.51N 87.52W
02/01/2021  M12.1 INCH       LAKE               IN   COCORAHS

            COCORAHS STATION IN-LK-15 DYER.

0700 AM     HEAVY SNOW       1 ENE FOREST PARK       41.88N 87.80W
02/01/2021  M12.0 INCH       COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-61 FOREST PARK 1 ENE.

0700 AM     HEAVY SNOW       1 NNE PARK FOREST       41.49N 87.68W
02/01/2021  M11.7 INCH       COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-69 PARK FOREST 1 NNE.

0700 AM     HEAVY SNOW       WEST RIDGE - CHICAGO    42.00N 87.70W
02/01/2021  M11.5 INCH       COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-94 CHICAGO - WEST
            RIDGE.

0700 AM     HEAVY SNOW       1 NNW ROSELLE           41.99N 88.08W
02/01/2021  M11.4 INCH       COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-288 ROSELLE 1 NNW.

0700 AM     HEAVY SNOW       1 NNW LINDENHURST       42.43N 88.03W
02/01/2021  M11.4 INCH       LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-98 LINDENHURST 1 NNW.

0700 AM     HEAVY SNOW       1 W MOKENA              41.53N 87.90W
02/01/2021  M11.4 INCH       WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-42 MOKENA 1 W.

0700 AM     HEAVY SNOW       1 NE RIVERWOODS         42.17N 87.89W
02/01/2021  M11.2 INCH       LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-39 RIVERWOODS 1 NE.

0700 AM     HEAVY SNOW       1 SE GRANDWOOD PARK     42.38N 87.97W
02/01/2021  M11.2 INCH       LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-42 GRANDWOOD PARK 1
            SE.

0700 AM     HEAVY SNOW       HOMEWOOD                41.56N 87.66W
02/01/2021  M11.1 INCH       COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-64 HOMEWOOD.

0700 AM     HEAVY SNOW       1 W GLEN ELLYN          41.88N 88.09W
02/01/2021  M11.0 INCH       DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-132 GLEN ELLYN 1 W.

0700 AM     HEAVY SNOW       2 WSW MOKENA            41.52N 87.92W
02/01/2021  M11.0 INCH       WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-97 MOKENA 2 WSW.

0700 AM     HEAVY SNOW       2 SE LOCKPORT           41.57N 88.03W
02/01/2021  M11.0 INCH       WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-80 LOCKPORT 2 SE.

0700 AM     HEAVY SNOW       2 S WOODRIDGE           41.73N 88.04W
02/01/2021  M10.5 INCH       DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-102 BOLINGBROOK 3 NE.

0700 AM     HEAVY SNOW       2 N BUFFALO GROVE       42.19N 87.96W
02/01/2021  M10.4 INCH       LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-16 BUFFALO GROVE 2 N.

0700 AM     HEAVY SNOW       4 SW PLAINFIELD         41.57N 88.27W
02/01/2021  M10.0 INCH       KENDALL            IL   COCORAHS

            COCORAHS STATION IL-KD-34 PLAINFIELD 4 SW.

0700 AM     HEAVY SNOW       1 SSW PARK RIDGE        42.00N 87.85W
02/01/2021  M9.8 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-180 PARK RIDGE 1 SSW.

0700 AM     HEAVY SNOW       1 WNW DEKALB            41.93N 88.77W
02/01/2021  M9.8 INCH        DE KALB            IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION DEKI2 DEKALB.

0700 AM     HEAVY SNOW       1 WSW LISLE             41.79N 88.10W
02/01/2021  M9.5 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-30 LISLE 1 WSW.

0700 AM     HEAVY SNOW       3 SSE WHEATFIELD        41.15N 87.04W
02/01/2021  M9.5 INCH        JASPER             IN   COCORAHS

            COCORAHS STATION IN-JS-1 WHEATFIELD 3 SSE.

0700 AM     HEAVY SNOW       1 NNW OAK FOREST        41.62N 87.75W
02/01/2021  M9.0 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-306 OAK FOREST 1 NNW.

0700 AM     HEAVY SNOW       2 WSW PALOS PARK        41.65N 87.86W
02/01/2021  M9.0 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-50 PALOS PARK 2 WSW.

0700 AM     HEAVY SNOW       1 N LISLE               41.81N 88.07W
02/01/2021  M9.0 INCH        DUPAGE             IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION WHTI2 MORTON
            ARBORETUM.

0700 AM     HEAVY SNOW       TROUT VALLEY            42.20N 88.25W
02/01/2021  M9.0 INCH        MCHENRY            IL   COCORAHS

            COCORAHS STATION IL-MCH-95 TROUT VALLEY.

0700 AM     HEAVY SNOW       4 NE FAIR OAKS          41.11N 87.20W
02/01/2021  M9.0 INCH        JASPER             IN   COCORAHS

            COCORAHS STATION IN-JS-31 DE MOTTE 6 S.

0700 AM     HEAVY SNOW       1 WSW CREST HILL        41.55N 88.13W
02/01/2021  M8.7 INCH        WILL               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION JKJI2 JOLIET 2 N.

0700 AM     HEAVY SNOW       1 SSW LA GRANGE PARK    41.82N 87.88W
02/01/2021  M8.5 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-98 LA GRANGE PARK 1
            SSW.

0700 AM     HEAVY SNOW       1 NNW MONTGOMERY        41.75N 88.35W
02/01/2021  M8.5 INCH        KANE               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION ARRI2 AURORA.

0700 AM     HEAVY SNOW       ST. ANNE                41.02N 87.72W
02/01/2021  M8.4 INCH        KANKAKEE           IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION SAAI2 ST. ANNE.

0700 AM     HEAVY SNOW       1 W HOFFMAN ESTATES     42.05N 88.12W
02/01/2021  M8.3 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-278 HOFFMAN ESTATES.

0700 AM     HEAVY SNOW       2 WNW BOONE GROVE       41.37N 87.16W
02/01/2021  M8.3 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-18 BOONE GROVE 2 WNW.

0700 AM     HEAVY SNOW       1 SW TIMBERLANE         42.32N 88.88W
02/01/2021  M8.0 INCH        BOONE              IL   COCORAHS

            COCORAHS STATION IL-BN-19 TIMBERLANE 1 SW.

0700 AM     HEAVY SNOW       1 SW ELMHURST           41.89N 87.95W
02/01/2021  M8.0 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-38 ELMHURST 1 SW.

0700 AM     HEAVY SNOW       5 NW WOODSTOCK          42.36N 88.53W
02/01/2021  M7.9 INCH        MCHENRY            IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION WODI2 WOODSTOCK 5 NW.

0700 AM     HEAVY SNOW       1 S SYCAMORE            41.98N 88.68W
02/01/2021  M7.8 INCH        DE KALB            IL   COCORAHS

            COCORAHS STATION IL-DK-37 SYCAMORE.

0700 AM     HEAVY SNOW       2 W BOURBONNAIS         41.17N 87.92W
02/01/2021  M7.8 INCH        KANKAKEE           IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION BOUI2 BOURBONNAIS.

0700 AM     HEAVY SNOW       CORTLAND                41.92N 88.69W
02/01/2021  M7.7 INCH        DE KALB            IL   COCORAHS

            COCORAHS STATION IL-DK-5 CORTLAND.

0700 AM     HEAVY SNOW       5 SSW NAPERVILLE        41.71N 88.17W
02/01/2021  M7.7 INCH        WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-92 NAPERVILLE 5 SSW.

0700 AM     HEAVY SNOW       2 ENE LAKEWOOD          42.23N 88.35W
02/01/2021  M7.6 INCH        MCHENRY            IL   COCORAHS

            COCORAHS STATION IL-MCH-83 CRYSTAL LAKE 1
            WSW.

0700 AM     HEAVY SNOW       1 NNE PALATINE          42.13N 88.03W
02/01/2021  M7.5 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-294 PALATINE 1 NNE.

0700 AM     HEAVY SNOW       4 ESE CHESTERTON        41.58N 86.99W
02/01/2021  M7.5 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-159 CHESTERTON 4 ESE.

0700 AM     HEAVY SNOW       3 N CARBON HILL         41.34N 88.30W
02/01/2021  M7.4 INCH        GRUNDY             IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION CTYI2 COAL CITY 4
            NNW.

0700 AM     HEAVY SNOW       3 NNW LAKE STATION      41.62N 87.25W
02/01/2021  M7.4 INCH        LAKE               IN   COCORAHS

            COCORAHS STATION IN-LK-63 GARY 5 ENE.

0700 AM     HEAVY SNOW       PORTER                  41.62N 87.08W
02/01/2021  M7.2 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-69 PORTER.

0700 AM     HEAVY SNOW       3 W ELGIN               42.04N 88.34W
02/01/2021  M7.1 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-95 ELGIN 3 W.

0700 AM     HEAVY SNOW       2 N ELGIN               42.06N 88.29W
02/01/2021  M7.0 INCH        KANE               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION ELGI2 ELGIN.

0700 AM     HEAVY SNOW       1 SSE DWIGHT            41.08N 88.42W
02/01/2021  M7.0 INCH        LIVINGSTON         IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION CWWI2 DWIGHT.

0700 AM     HEAVY SNOW       1 WSW HARVARD           42.42N 88.63W
02/01/2021  M7.0 INCH        MCHENRY            IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION HVDI2 HARVARD.

0700 AM     HEAVY SNOW       3 NNW CARBON HILL       41.33N 88.31W
02/01/2021  M6.9 INCH        GRUNDY             IL   COCORAHS

            COCORAHS STATION IL-GY-16 CARBON HILL 3 NNW.

0700 AM     HEAVY SNOW       6 E ASHKUM              40.88N 87.85W
02/01/2021  M6.8 INCH        IROQUOIS           IL   COCORAHS

            COCORAHS STATION IL-IR-2 ASHKUM 6 E.

0700 AM     HEAVY SNOW       3 NE DUPAGE AIRPORT     41.94N 88.20W
02/01/2021  M6.5 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-157 WEST CHICAGO 4
            NNE.

0700 AM     HEAVY SNOW       4 NNW PLAINFIELD        41.67N 88.23W
02/01/2021  M6.4 INCH        WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-148 PLAINFIELD 4 NNW.

0700 AM     HEAVY SNOW       1 NNE BOULDER HILL      41.72N 88.33W
02/01/2021  M6.3 INCH        KENDALL            IL   COCORAHS

            COCORAHS STATION IL-KD-5 BOULDER HILL 1 NNE.

0700 AM     HEAVY SNOW       2 WNW LOVES PARK        42.32N 89.09W
02/01/2021  M6.3 INCH        WINNEBAGO          IL   COCORAHS

            COCORAHS STATION IL-WN-48 4 NNW ROCKFORD.

0700 AM     HEAVY SNOW       2 W HEBRON              42.47N 88.48W
02/01/2021  M6.1 INCH        MCHENRY            IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION HEBI2 HEBRON 2 WSW.

0700 AM     HEAVY SNOW       CAPRON                  42.40N 88.74W
02/01/2021  M6.0 INCH        BOONE              IL   COCORAHS

            COCORAHS STATION IL-BN-14 CAPRON.

0700 AM     HEAVY SNOW       4 ESE AURORA            41.73N 88.24W
02/01/2021  M6.0 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-16 AURORA 4 ESE.

0700 AM     SNOW             1 SSW GENEVA            41.87N 88.31W
02/01/2021  M5.2 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-127 GENEVA.

0700 AM     SNOW             2 WNW GENEVA            41.89N 88.33W
02/01/2021  M5.1 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-121 GENEVA 2 WNW.

0700 AM     SNOW             1 S FAIRBURY            40.73N 88.52W
02/01/2021  M3.2 INCH        LIVINGSTON         IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION FRBI2 FAIRBURY.

0700 AM     SNOW             2 SSE STREATOR          41.10N 88.82W
02/01/2021  M2.7 INCH        LIVINGSTON         IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION STAI2 STREATOR.

0659 AM     HEAVY SNOW       1 NNW DOWNERS GROVE     41.80N 88.02W
02/01/2021  M12.7 INCH       DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-127 DOWNERS GROVE 1
            NNW.

0645 AM     HEAVY SNOW       1 N MEDINAH             42.00N 88.05W
02/01/2021  M9.1 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-75 ELK GROVE VILLAGE
            2 WSW.

0630 AM     HEAVY SNOW       2 E CHESTERTON          41.61N 87.03W
02/01/2021  M6.8 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-110 CHESTERTON 2 E.

0615 AM     HEAVY SNOW       1 NNW ALGONQUIN         42.17N 88.30W
02/01/2021  M11.1 INCH       MCHENRY            IL   COCORAHS

            COCORAHS STATION IL-MCH-43 ALGONQUIN 1 NNW.

0600 AM     HEAVY SNOW       NWS CHICAGO-ROMEOVILLE  41.60N 88.09W
02/01/2021  M12.9 INCH       WILL               IL   OFFICIAL NWS OBS

            STORM TOTAL SNOWFALL FOR THE JANUARY 30-31
            EVENT.

0600 AM     HEAVY SNOW       HIGHWOOD                42.20N 87.81W
02/01/2021  M11.8 INCH       LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-69 HIGHWOOD.

0600 AM     HEAVY SNOW       1 NNE HOMER GLEN        41.61N 87.93W
02/01/2021  M11.5 INCH       WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-131 HOMER GLEN 1 NNE.

0600 AM     HEAVY SNOW       1 NNW DEMOTTE           41.21N 87.21W
02/01/2021  M11.2 INCH       JASPER             IN   COCORAHS

            COCORAHS STATION IN-JS-37 DEMOTTE.

0600 AM     HEAVY SNOW       1 WSW ST. JOHN          41.45N 87.48W
02/01/2021  M11.2 INCH       LAKE               IN   COCORAHS

            COCORAHS STATION IN-LK-46 ST. JOHN.

0600 AM     HEAVY SNOW       1 WSW NAPERVILLE        41.77N 88.16W
02/01/2021  M10.0 INCH       DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-156 NAPERVILLE.

0600 AM     HEAVY SNOW       1 ESE ELK GROVE VILLAGE 42.00N 87.98W
02/01/2021  M9.5 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-63 ELK GROVE VILLAGE
            1 ESE.

0600 AM     HEAVY SNOW       COLLEGEVILLE            40.91N 87.16W
02/01/2021  M9.0 INCH        JASPER             IN   COCORAHS

            COCORAHS STATION IN-JS-7 COLLEGEVILLE.

0600 AM     HEAVY SNOW       4 NNE BOONE GROVE       41.41N 87.10W
02/01/2021  M9.0 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-117 BOONE GROVE 4
            NNE.

0600 AM     HEAVY SNOW       OGDEN DUNES             41.62N 87.20W
02/01/2021  M7.6 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-157 OGDEN DUNES.

0600 AM     HEAVY SNOW       BATAVIA                 41.85N 88.31W
02/01/2021  M6.3 INCH        KANE               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION BATI2 BATAVIA.

0600 AM     HEAVY SNOW       4 SW VALPARAISO         41.43N 87.11W
02/01/2021  M6.1 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-12 VALPARAISO 4 SW.

0600 AM     SNOW             2 N CRESCENT CITY       40.80N 87.86W
02/01/2021  M4.3 INCH        IROQUOIS           IL   COCORAHS

            COCORAHS STATION IL-IR-14 CRESCENT CITY 2 N.

0600 AM     SNOW             3 S EARLVILLE           41.55N 88.91W
02/01/2021  M4.2 INCH        LA SALLE           IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION ERVI2 EARLVILLE 3 S.

0553 AM     HEAVY SNOW       1 N VALPARAISO          41.49N 87.06W
02/01/2021  M8.4 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-98 VALPARAISO 1 N.

0500 AM     HEAVY SNOW       2 NE SOMONAUK           41.65N 88.66W
02/01/2021  M10.0 INCH       DE KALB            IL   COCORAHS

            COCORAHS STATION IL-DK-24 SOMONAUK 2 NE.

0500 AM     HEAVY SNOW       1 ENE COUNTRYSIDE       41.78N 87.86W
02/01/2021  M9.5 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-88 COUNTRYSIDE 1 ENE.

0315 AM     HEAVY SNOW       1 E PALATINE            42.11N 88.02W
02/01/2021  M8.2 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-121 PALATINE 1 E.

1200 AM     HEAVY SNOW       BERWYN                  41.84N 87.79W
02/01/2021  M12.0 INCH       COOK               IL   PUBLIC



1200 AM     HEAVY SNOW       MOKENA                  41.53N 87.88W
02/01/2021  M11.4 INCH       WILL               IL   TRAINED SPOTTER



1200 AM     HEAVY SNOW       3 SW MIDWAY             41.73N 87.77W
02/01/2021  M11.3 INCH       COOK               IL   CO-OP OBSERVER

            STORM TOTAL FOR JANUARY 30-31 EVENT.

1200 AM     HEAVY SNOW       LANSING                 41.57N 87.54W
02/01/2021  M11.0 INCH       COOK               IL   CO-OP OBSERVER



1200 AM     HEAVY SNOW       OHARE AIRPORT          41.98N 87.90W
02/01/2021  M10.8 INCH       COOK               IL   OFFICIAL NWS OBS

            RE-TRANSMISSION FOR NOHRSC ANALYSIS. STORM
            TOTAL SNOWFALL FOR JAN. 30-31 EVENT. ON.
            JAN. 30, 4.5 INCHES TOTAL FELL. ON JAN. 31,
            2.3 INCHES FELL BETWEEN 12 AM AND 6 AM, 2.0
            INCHES BETWEEN 6 AM AND 12 PM, 1.7 INCHES
            BETWEEN 12 PM AND 6 PM, AND 0.3 INCHES
            BETWEEN 6 PM AND 12 AM, BRINGING DAILY TOTAL
            TO 6.3 INCHES. SNOW DEPTH OF 15 INCHES AT
            MIDNIGHT OBSERVATION.

1200 AM     HEAVY SNOW       ROCKFORD AIRPORT        42.20N 89.10W
02/01/2021  M6.8 INCH        WINNEBAGO          IL   OFFICIAL NWS OBS

            STORM TOTAL SNOWFALL FOR JAN. 30-31 EVENT. A
            TRACE OF SNOW WAS REPORTED BETWEEN 6 PM AND.

1100 PM     HEAVY SNOW       THORNTON                41.57N 87.62W
01/31/2021  M12.7 INCH       COOK               IL   PUBLIC



1000 PM     HEAVY SNOW       MORGAN PARK - CHICAGO   41.69N 87.67W
01/31/2021  M11.0 INCH       COOK               IL   PUBLIC

            REPORTED AT MORGAN PARK, IL.

0930 PM     HEAVY SNOW       ANTIOCH                 42.48N 88.10W
01/31/2021  M9.8 INCH        LAKE               IL   PUBLIC



0900 PM     HEAVY SNOW       LIBERTYVILLE            42.28N 87.95W
01/31/2021  M10.5 INCH       LAKE               IL   TRAINED SPOTTER



0830 PM     HEAVY SNOW       KENTLAND                40.77N 87.44W
01/31/2021  M9.5 INCH        NEWTON             IN   PUBLIC

            STORM TOTAL 9.5 INCHES, RELAYED VIA
            BROADCAST MEDIA.

0830 PM     SNOW             GILMAN                  40.77N 87.99W
01/31/2021  M2.0 INCH        IROQUOIS           IL   PUBLIC



0830 PM     SNOW             GIBSON CITY             40.47N 88.38W
01/31/2021  M1.5 INCH        FORD               IL   PUBLIC



0830 PM     SNOW             MILFORD                 40.64N 87.70W
01/31/2021  M1.5 INCH        IROQUOIS           IL   PUBLIC



0800 PM     HEAVY SNOW       DYER                    41.50N 87.51W
01/31/2021  M10.5 INCH       LAKE               IN   PUBLIC



0800 PM     HEAVY SNOW       1 ENE CHICAGO LOOP      41.88N 87.62W
01/31/2021  M8.6 INCH        COOK               IL   BROADCAST MEDIA

            UPDATED STORM TOTAL SNOW THROUGH 8PM FOR THE
            DOWNTOWN LOOP/MILLENNIUM PARK AREA.

0740 PM     HEAVY SNOW       LAKE SUMMERSET          42.45N 89.40W
01/31/2021  M7.8 INCH        WINNEBAGO          IL   PUBLIC

            STORM TOTAL SNOW. RELAYED VIA BROADCAST
            MEDIA.

0730 PM     HEAVY SNOW       MORTON GROVE            42.04N 87.78W
01/31/2021  M12.1 INCH       COOK               IL   BROADCAST MEDIA

            STORM TOTAL 12.1 INCHES.

0709 PM     HEAVY SNOW       FLOSSMOOR               41.54N 87.68W
01/31/2021  M11.5 INCH       COOK               IL   TRAINED SPOTTER

            STORM TOTAL SNOW. RELAYED VIA SOCIAL MEDIA.

0655 PM     HEAVY SNOW       PEOTONE                 41.33N 87.79W
01/31/2021  M12.7 INCH       WILL               IL   TRAINED SPOTTER

            STORM TOTAL 12.7 INCHES.

0650 PM     HEAVY SNOW       KOUTS                   41.32N 87.03W
01/31/2021  M9.0 INCH        PORTER             IN   PUBLIC

            STORM TOTAL SNOW. RELAYED VIA SOCIAL MEDIA.

0530 PM     HEAVY SNOW       PECATONICA              42.31N 89.36W
01/31/2021  M7.0 INCH        WINNEBAGO          IL   PUBLIC

            STORM TOTAL SNOW. RELAYED VIA BROADCAST
            MEDIA.

0526 PM     HEAVY SNOW       NEW MILFORD             42.17N 89.07W
01/31/2021  M7.0 INCH        WINNEBAGO          IL   PUBLIC

            STORM TOTAL SNOW. RELAYED VIA BROADCAST
            MEDIA.

0526 PM     HEAVY SNOW       SOUTH BELOIT            42.49N 89.04W
01/31/2021  M6.5 INCH        WINNEBAGO          IL   PUBLIC

            STORM TOTAL SNOW. RELAYED VIA BROADCAST
            MEDIA.

0526 PM     HEAVY SNOW       2 SW ROCKFORD           42.25N 89.13W
01/31/2021  M6.0 INCH        WINNEBAGO          IL   PUBLIC

            STORM TOTAL SNOW. RELAYED VIA BROADCAST
            MEDIA.

0520 PM     HEAVY SNOW       2 N HOMER GLEN          41.63N 87.94W
01/31/2021  M11.0 INCH       WILL               IL   PUBLIC

            STORM TOTAL SNOW. RELAYED VIA SOCIAL MEDIA.

0519 PM     HEAVY SNOW       1 ENE ST. CHARLES       41.92N 88.30W
01/31/2021  M8.4 INCH        KANE               IL   TRAINED SPOTTER

            STORM TOTAL 8.4 INCHES. SNOW DEPTH OF 12
            INCHES.

0515 PM     HEAVY SNOW       OAK LAWN                41.72N 87.75W
01/31/2021  M10.5 INCH       COOK               IL   PUBLIC

            STORM TOTAL SNOW. RELAYED VIA SOCIAL MEDIA.

0500 PM     HEAVY SNOW       DEERFIELD               42.17N 87.84W
01/31/2021  M12.0 INCH       LAKE               IL   PUBLIC

            STORM TOTAL SNOW. RELAYED VIA SOCIAL MEDIA.

0500 PM     HEAVY SNOW       JOLIET                  41.53N 88.08W
01/31/2021  M10.7 INCH       WILL               IL   TRAINED SPOTTER

            STORM TOTAL SNOW. RELAYED VIA SOCIAL MEDIA.

0457 PM     SNOW             1 NW LOWELL             41.30N 87.44W
01/31/2021  M10.6 INCH       LAKE               IN   PUBLIC



0430 PM     HEAVY SNOW       1 E MANHATTAN           41.43N 87.96W
01/31/2021  M11.0 INCH       WILL               IL   PUBLIC



0415 PM     HEAVY SNOW       1 WNW WOODRIDGE         41.76N 88.07W
01/31/2021  M10.5 INCH       DUPAGE             IL   NWS EMPLOYEE

            STORM TOTAL 10.5 INCHES.

0340 PM     HEAVY SNOW       LEMONT                  41.67N 88.00W
01/31/2021  M9.5 INCH        COOK               IL   EMERGENCY MNGR

            STORM TOTAL 9.5 INCHES AT LEMONT EOC.


&&

$$

High Snow Depths

Midwest Snow Depth on February 1

At the end of this event, snow depths across a large part of the area that had the heaviest snow were 10-15+".

• The snow depth at the end of this event at Chicago O'Hare Airport was 15":
  • Highest snow depth since 15" on February 5, 2015 (in the wake of the January 31-February 2, 2015 event).
• The snow depth at the end of this event at Rockford Airport was 12":
  • Highest snow depth since 15" on February 2, 2019

Additional

Satellite water vapor imagery of the storm system on the night of January 30

Links

• Other NWS recaps of this event:  Northwest IL    Northern IN    Central IN
• National Snowfall Totals
• Snow Depth Information
• Map of Snowfall Local Storm Reports
• Create Your Own Observed Contoured Snowfall Map
• Winter 2020-2021 Events in the Local Area
• NWS Chicago Science & Past Events Page