December 11, 2017: Brief Snow Event During Rush Hour

Fast Facts

• The official snowfall for Chicago was 1.4" observed at Chicago O'Hare International Airport.

• The official snowfall for Rockford was 1.1" observed at Chicago Rockford International Airport.

• Other snowfall amounts include 3.2" near Gurnee and 3.0" near Lake Villa, both in Lake County.

Snow/Ice Totals

Snow map updates between 8 and 10 a.m.

Public Information Statement
National Weather Service Chicago IL
1049 AM CST Tue Dec 12 2017

...Morning Snowfall Roundup...

   The following are snow amounts for the previous 24 hours
   as measured in the morning by NWS Cooperative Observers
   and CoCoRaHS observers.
   Observations are usually taken at 7 AM.

   24-hour Snowfall Amounts for Tuesday(12/12/17)...


Northern Illinois                              Snow
  Location (County):                           fall(inches)

  Gurnee 2W (Lake)..............................3.2
  Lake Villa 2WSW (Lake)........................3.0
  Wonder Lake 1WNW (McHenry)....................2.8
  Lake Villa 1SSW (Lake)........................2.5
  Bull Valley 2WNW (McHenry)....................2.4
  Dixon 3NNW (Lee)..............................2.3
  Waukegan 2N (Lake)............................2.3
  Woodstock 5nw (McHenry).......................2.3
  Elburn (Kane).................................2.0
  Sterling 4NE (Lee)............................2.0
  Mundelein 2WNW (Lake).........................2.0
  Woodstock 4SW (McHenry).......................1.8
  McHenry (McHenry).............................1.8
  Mundelein (Lake)..............................1.8
  Hoffman Estates 5W (Cook).....................1.6
  Elburn (Kane).................................1.5
  Elgin 2W (Kane)...............................1.5
  Dixon 2SW (Lee)...............................1.5
  Buffalo Grove 2N (Lake).......................1.5
  Mundelein (Lake)..............................1.5
  Rockford 2ENE (Winnebago).....................1.5
  Elmhurst 1ESE (Du Page).......................1.4
  Ohare (Cook)..................................1.4
  Palatine 1NNE (Cook)..........................1.3
  Elk Grove Village 1ESE (Cook).................1.3
  Park Ridge (Cook).............................1.2
  De Kalb 1SW (De Kalb).........................1.2
  Highwood 1S (Lake)............................1.2
  Yorkville 2SE (Kendall).......................1.2
  Batavia (Kane)................................1.1
  Genoa (De Kalb)...............................1.1
  Capron (Boone)................................1.1
  Lincolnwood 3E (Cook).........................1.1
  Byron 3N (Ogle)...............................1.1
  Rockford (Winnebago)..........................1.1
  Barrington (Lake).............................1.0
  Botanic Gardens (Cook)........................1.0
  Elgin (Kane)..................................1.0
  Harvard (McHenry).............................1.0
  Mount Prospect 3NE (Cook).....................1.0
  Oak Park 1SW (Cook)...........................1.0
  Elk Grove Village 2WSW (Cook).................1.0
  Lincolnwood 2E (Cook).........................1.0
  Wheaton 2NNE (Du Page)........................1.0
  North Aurora 2NE (Kane).......................1.0
  Lily Lake 2E (Kane)...........................1.0
  Batavia 1WNW (Kane)...........................1.0
  Geneva 1SSW (Kane)............................1.0
  Ashton (Lee)..................................1.0
  Cary (McHenry)................................1.0
  Crystal Lake 1WSW (McHenry)...................1.0
  Lake Zurich (Lake)............................1.0
  Rochelle (Ogle)...............................1.0
  De Kalb (De Kalb).............................0.9
  Park Ridge 1WNW (Cook)........................0.9
  Harwood Heights (Cook)........................0.9
  Cortland (De Kalb)............................0.9
  De Kalb (De Kalb).............................0.9
  Downers Grove 0.4NNE (Du Page)................0.9
  St. Charles 6NW (Kane)........................0.9
  Elgin (Kane)..................................0.8
  Carol Stream (Du Page)........................0.8
  Elgin 1S (Kane)...............................0.8
  Geneva 4WSW (Kane)............................0.8
  Batavia 2WNW (Kane)...........................0.8
  Aurora 4NE (Du Page)..........................0.7
  Belvidere (Boone).............................0.6
  Oak Park 2S (Cook)............................0.6
  Oak Park 1NNE (Cook)..........................0.6
  Lisle 1SE (Du Page)...........................0.6
  Naperville 1NW (Du Page)......................0.6
  Roscoe 2ESE (Winnebago).......................0.6
  Midway Coop (Cook)............................0.6
  Roscoe 2se (Winnebago)........................0.6
  Steward (Lee).................................0.6
  Aurora (Kane).................................0.5
  Brookfield (Cook).............................0.5
  Somonauk 2NE (De Kalb)........................0.5
  Aurora 4SE (Du Page)..........................0.5
  Glen Ellyn 2SSE (Du Page).....................0.5
  Burr Ridge 2SW (Du Page)......................0.5
  Sugar Grove 1NE (Kane)........................0.5
  Algonquin 1N (McHenry)........................0.5
  Paw Paw (Lee).................................0.5
  Plainfield (Will).............................0.5
  Lisle Morton Arb (Du Page)....................0.5
  La Grange Park 1SSW (Cook)....................0.4
  Lake in the Hills 2.5W (McHenry)..............0.4
  Romeoville (Will).............................0.4
  Naperville 2ESE (Du Page).....................0.4
  Earlville 3S (La Salle).......................0.3
  Chicago Ridge (Cook)..........................0.3
  Worth (Cook)..................................0.3
  Countryside 1ENE (Cook).......................0.3
  Homer Glen 1ENE (Will)........................0.3
  Manhattan 5ENE (Will).........................0.3
  Lockport 1SE (Will)...........................0.3
  Joliet 2n (Will)..............................0.3
  Manhattan (Will)..............................0.3
  Mendota (La Salle)............................0.3
  Hebron (McHenry)..............................0.2
  Aurora 4SE (Du Page)..........................0.2
  Manhattan 1ESE (Will).........................0.2
  Peotone (Will)................................0.2
  New Lenox 2SE (Will)..........................0.2
  Peotone (Will)................................0.2
  Bridgeview 1NNW (Cook)........................0.1
  Park Forest 1SW (Cook)........................0.1
  Oak Lawn 2WNW (Cook)..........................0.1
  Homewood (Cook)...............................0.1
  New Lenox 3E (Will)...........................0.1
  Oak Lawn 2NW (Cook)...........................0.1
  Bourbonnais (Kankakee)......................TRACE
  Coal City 4NNW (Grundy).....................TRACE
  Chicago 6ESE (Cook).........................TRACE
  Carbon Hill 3.1N (Grundy)...................TRACE
  Morris 6ESE (Grundy)........................TRACE
  Herscher 3E (Kankakee)......................TRACE
  Ottawa 1NW (La Salle).......................TRACE
  Ottawa 2N (La Salle)........................TRACE
  Streator 4ENE (La Salle)....................TRACE
  La Salle (La Salle).........................TRACE
  Peru 1ENE (La Salle)........................TRACE
  Crete 3E (Will).............................TRACE
  Wilmington 3SE (Will).......................TRACE
  Joliet Lock/dam (Will)......................TRACE
  Lansing (Cook)..............................TRACE
  Monee (Will)................................TRACE
  Morris (Grundy).............................TRACE
  Ottawa (La Salle)...........................TRACE
  Park Forest (Cook)..........................TRACE
  Willow Springs (Cook).......................TRACE

Northwest Indiana                              Snow
  Location (County):                           fall(inches)

  Crown Point (Lake)..........................TRACE
  Indiana Dunes (Porter)......................TRACE
  De Motte 6S (Jasper)........................TRACE
  De Motte 1NNW (Jasper)......................TRACE
  De Motte 4SW (Jasper).......................TRACE
  Crown Point 1N (Lake).......................TRACE
  Gary 5ENE (Lake)............................TRACE
  Valparaiso 6SSW (Porter)....................TRACE
  Valparaiso 4SW (Porter).....................TRACE
  (kb9f)Valparaiso 4S (Porter)................TRACE
  Hebron 1NE (Porter).........................TRACE
  Hebron 4NE (Porter).........................TRACE
  Portage 1ESE (Porter).......................TRACE
  Valparaiso 6WSW (Porter)....................TRACE
  Chesterton 4E (Porter)......................TRACE

Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
922 PM CST MON DEC 11 2017

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

0330 PM     SNOW             N CAPRON                42.40N 88.74W
12/11/2017  M1.0 INCH        BOONE              IL   COCORAHS

            SNOWFALL IN 90 MINUTES AS OF REPORT TIME.

0400 PM     SNOW             GRAYSLAKE               42.35N 88.04W
12/11/2017  M1.4 INCH        LAKE               IL   TRAINED SPOTTER

            SNOWFALL IN ONE HOUR. STILL SNOWING MODERATE TO HEAVY AT
            REPORT TIME.

0400 PM     SNOW             1 NNW LINDENHURST       42.43N 88.04W
12/11/2017  E2.0 INCH        LAKE               IL   COCORAHS

            SNOWFALL IN TWO HOURS. LIGHT SNOW AT REPORT TIME.

0410 PM     SNOW             2 SW FOX LAKE           42.40N 88.21W
12/11/2017  M2.8 INCH        MCHENRY            IL   PUBLIC

0417 PM     SNOW             GURNEE                  42.38N 87.94W
12/11/2017  M2.4 INCH        LAKE               IL   PUBLIC

0430 PM     SNOW             LAKE FOREST             42.24N 87.86W
12/11/2017  M1.3 INCH        LAKE               IL   PUBLIC

0430 PM     SNOW             LIBERTYVILLE            42.28N 87.97W
12/11/2017  E2.0 INCH        LAKE               IL   PUBLIC

            SNOW SO FAR RELAYED VIA TWITTER.

0430 PM     SNOW             WOODSTOCK               42.31N 88.44W
12/11/2017  E2.5 INCH        MCHENRY            IL   PUBLIC

0435 PM     SNOW             1 NNW MARENGO           42.26N 88.61W
12/11/2017  M2.1 INCH        MCHENRY            IL   COCORAHS

            SNOWFALL IN PAST 90 MINUTES.

0455 PM     SNOW             MCHENRY                 42.34N 88.29W
12/11/2017  M2.5 INCH        MCHENRY            IL   CO-OP OBSERVER

            SNOW MEASURED BY WOODSTOCK SUPPLEMENTAL COOP OBSERVER.
            REPORTED THAT ROUTE 31 SOUTH OF MCHENRY IS A SHEET OF
            ICE.

0500 PM     SNOW             3 N UNION               42.28N 88.54W
12/11/2017  M1.8 INCH        MCHENRY            IL   PUBLIC

            SENECA TOWNSHIP.

0500 PM     SNOW             WINNEBAGO               42.27N 89.24W
12/11/2017  E1.5 INCH        WINNEBAGO          IL   PUBLIC

0500 PM     SNOW             ROUND LAKE BEACH        42.38N 88.08W
12/11/2017  E3.0 INCH        LAKE               IL   PUBLIC

0505 PM     SNOW             SYCAMORE                41.98N 88.70W
12/11/2017  E2.0 INCH        DE KALB            IL   PUBLIC

0515 PM     SNOW             W SLEEPY HOLLOW         42.09N 88.31W
12/11/2017  M0.7 INCH        KANE               IL   COCORAHS

0515 PM     SNOW             1 W SLEEPY HOLLOW       42.09N 88.33W
12/11/2017  M1.4 INCH        KANE               IL   COCORAHS

            SNOWFALL IN PAST TWO HOURS UP TO REPORT TIME. LIGHT SNOW
            WINDING DOWN AT REPORT TIME.

0530 PM     SNOW             DIXON                   41.85N 89.48W
12/11/2017  M1.0 INCH        LEE                IL   BROADCAST MEDIA

0530 PM     SNOW             2 WNW BULL VALLEY       42.32N 88.39W
12/11/2017  M2.4 INCH        MCHENRY            IL   COCORAHS

0534 PM     SNOW             2 E SCHAUMBURG          42.03N 88.04W
12/11/2017  M0.6 INCH        COOK               IL   COCORAHS

            SNOWFALL IN 40 MINUTES AS OF REPORT TIME.

0545 PM     SNOW             MOUNT PROSPECT          42.07N 87.94W
12/11/2017  M0.8 INCH        COOK               IL   PUBLIC

0548 PM     SNOW             PALATINE                42.11N 88.04W
12/11/2017  M1.1 INCH        COOK               IL   NWS EMPLOYEE

            MEASURED BY OFF DUTY NWS EMPLOYEE.

0550 PM     SNOW             OHARE AIRPORT           41.98N 87.90W
12/11/2017  M1.0 INCH        COOK               IL   OFFICIAL NWS OBS

0600 PM     SNOW             ROCKFORD AIRPORT        42.20N 89.10W
12/11/2017  M1.1 INCH        WINNEBAGO          IL   OFFICIAL NWS OBS

            SNOWFALL TOTAL.

0600 PM     SNOW             ST. CHARLES             41.92N 88.30W
12/11/2017  M1.0 INCH        KANE               IL   COCORAHS

0610 PM     SNOW             WOODSTOCK               42.31N 88.44W
12/11/2017  M1.6 INCH        MCHENRY            IL   CO-OP OBSERVER

            SNOW TOTAL MEASURED BY SUPPLEMENTAL COOP OBSERVER. LIQUID
            EQUIVALENT 0.17 INCHES.

0615 PM     SNOW             DE KALB                 41.93N 88.75W
12/11/2017  M1.5 INCH        DE KALB            IL   TRAINED SPOTTER

0618 PM     SNOW             WESTCHESTER             41.85N 87.89W
12/11/2017  E1.5 INCH        COOK               IL   PUBLIC

0630 PM     SNOW             ESE ELK GROVE VILLAGE   42.01N 87.99W
12/11/2017  M1.3 INCH        COOK               IL   COCORAHS

0630 PM     SNOW             OHARE AIRPORT           41.98N 87.90W
12/11/2017  M1.4 INCH        COOK               IL   OFFICIAL NWS OBS

            EVENT TOTAL.

0630 PM     SNOW             2 WSW ELK GROVE VILLAGE 41.99N 88.03W
12/11/2017  M1.0 INCH        COOK               IL   COCORAHS

0638 PM     SNOW             BATAVIA                 41.85N 88.30W
12/11/2017  M1.2 INCH        KANE               IL   TRAINED SPOTTER

            SNOW TOTAL.

0638 PM     SNOW             BATAVIA                 41.85N 88.30W
12/11/2017  M1.2 INCH        KANE               IL   TRAINED SPOTTER

            SNOW TOTAL.

0650 PM     SNOW             3 SW MIDWAY AIRPORT     41.75N 87.79W
12/11/2017  M0.6 INCH        COOK               IL   CO-OP OBSERVER

            LIQUID EQUIV 0.05

Additional

Links

• Adjacent Areas:  Northwest IL   Central IL     WI    Northern IN    Central IN
• National Snowfall Totals
• Snow Depth Information
• Map of Snowfall Local Storm Reports
• Create Your Own Observed Contoured Snowfall Map
• Winter 2017-2018 Events in the Local Area
• NWS Chicago Science & Past Events Page