Overview
Fast Facts
Event Snow Totals
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1122 AM CST MON DEC 12 2016
...2-DAY SNOWFALL ROUND-UP...
THE FOLLOWING ARE SNOW AMOUNTS FOR THE PREVIOUS 2 DAYS
AS MEASURED IN THE MORNING BY NWS COOPERATIVE OBSERVERS
AND COCORAHS OBSERVERS. OBSERVATIONS ARE USUALLY
TAKEN AT 7 AM.
2-DAY SNOW TOTALS FOR MONDAY (12/12/16)
AS OF 11:22 AM CST
ILLINOIS 2-DAY SNOW FALL
LOCATION (COUNTY): AMT(IN) REPORTS
HARVARD 3SSE (MCHENRY).......................11.7 (2)
BULL VALLEY 2WNW (MCHENRY)...................10.8 (2)
HARVARD (MCHENRY).............................9.5 (2)
RIVERWOODS (LAKE).............................9.3 (2)
LAKE ZURICH (LAKE)............................9.1 (2)
HIGHWOOD 1S (LAKE)............................9.0 (2)
GENOA (DE KALB)...............................8.8 (2)
WOODSTOCK 5NW (MCHENRY).......................8.7 (2)
WOODSTOCK 4SW (MCHENRY).......................8.5 (2)
WONDER LAKE 1WNW (MCHENRY)....................8.1 (2)
SCHAUMBURG 2E (COOK)..........................8.1 (2)
DOWNERS GROVE 0.4NNE (DU PAGE)...............11.7 (3)
ST. CHARLES (KANE)............................8.0 (2)
WAUKEGAN 2N (LAKE)............................7.9 (2)
ELK GROVE VILLAGE 1ESE (COOK).................7.9 (2)
OHARE (COOK)..................................7.8 (2)
LAKE VILLA 1SSW (LAKE)........................7.8 (2)
BEACH PARK 1W (LAKE)..........................7.8 (2)
ELGIN 2W (KANE)...............................7.8 (2)
HOFFMAN ESTATES 5W (COOK).....................7.8 (2)
ROSCOE 2SE (WINNEBAGO)........................7.7 (2)
ROSCOE 2ESE (WINNEBAGO).......................7.7 (2)
LAKE VILLA 2WSW (LAKE)........................7.7 (2)
BARRINGTON (LAKE).............................7.7 (2)
FOX LAKE 2SE (LAKE)...........................7.7 (2)
ELK GROVE VILLAGE 2WSW (COOK).................7.7 (2)
PARK FOREST (COOK)............................7.5 (2)
BUFFALO GROVE 2N (LAKE).......................7.5 (2)
LINCOLNSHIRE 1N (LAKE)........................7.5 (2)
GENEVA 4WSW (KANE)............................7.5 (2)
BOTANIC GARDENS (COOK)........................7.5 (2)
WILLOW SPRINGS (COOK).........................7.4 (2)
MUNDELEIN 2WNW (LAKE).........................7.4 (2)
GENEVA 1SSW (KANE)............................7.3 (2)
MUNDELEIN (LAKE)..............................7.2 (2)
MIDWAY COOP (COOK)............................7.0 (2)
ROCKFORD 1NW (WINNEBAGO)......................7.0 (2)
BATAVIA 1WSW (KANE)...........................7.0 (2)
ROSELLE 1ESE (DU PAGE)........................7.0 (2)
PARK RIDGE 1WNW (COOK)........................7.0 (2)
BATAVIA 2WNW (KANE)...........................6.9 (2)
MCHENRY (MCHENRY).............................6.7 (2)
PALATINE 1E (COOK)............................6.7 (2)
ELMHURST 1ESE (DU PAGE).......................6.7 (2)
ROCKFORD 2ENE (WINNEBAGO).....................6.5 (2)
NAPERVILLE 1NW (DU PAGE)......................6.5 (2)
OAK PARK 2S (COOK)............................6.5 (2)
PARK RIDGE (COOK).............................6.4 (2)
ROCKFORD (WINNEBAGO)..........................6.3 (2)
LISLE 1SE (DU PAGE)...........................6.3 (2)
LINCOLNWOOD 2E (COOK).........................6.2 (2)
MONEE (WILL)..................................6.1 (2)
CRETE 3E (WILL)...............................6.1 (2)
BATAVIA (KANE)................................6.1 (2)
BYRON 3N (OGLE)...............................6.0 (2)
NORTH AURORA 2NE (KANE).......................6.0 (2)
ELBURN (KANE).................................6.0 (2)
OAK LAWN 2WNW (COOK)..........................6.0 (2)
ELBURN (KANE).................................6.0 (2)
AMBOY (LEE)...................................6.0 (2)
SUGAR GROVE 1NE (KANE)........................5.9 (2)
LISLE (DU PAGE)...............................5.9 (2)
PEOTONE (WILL)................................5.8 (2)
LA GRANGE PARK 1SSW (COOK)....................5.8 (2)
ROMEOVILLE (WILL).............................5.6 (2)
DE KALB (DE KALB).............................5.6 (2)
ROGERS PARK 2SW (COOK)........................5.6 (2)
NEW LENOX 2SE (WILL)..........................5.5 (2)
ST. CHARLES 6NW (KANE)........................5.5 (2)
ELGIN 1S (KANE)...............................5.5 (2)
NAPERVILLE 2SE (DU PAGE)......................5.5 (2)
SOMONAUK 2NE (DE KALB)........................5.5 (2)
LINCOLNWOOD 3E (COOK).........................5.5 (2)
CHICAGO RIDGE (COOK)..........................5.5 (2)
CHICAGO 6ESE (COOK)...........................5.5 (2)
ELGIN (KANE)..................................5.5 (2)
CAPRON (BOONE)................................5.4 (2)
BURR RIDGE 2SW (DU PAGE)......................5.3 (2)
LANSING (COOK)................................5.2 (2)
PARK FOREST 1SW (COOK)........................5.2 (2)
HOMER GLEN 1ENE (WILL)........................5.1 (2)
BOLINGBROOK 3NE (DU PAGE).....................5.1 (2)
JOLIET LOCK/DAM (WILL)........................5.0 (2)
DE KALB (DE KALB).............................5.0 (2)
MANHATTAN (WILL)..............................4.9 (2)
MANHATTAN 5ENE (WILL).........................4.9 (2)
PLAINFIELD 5SW (KENDALL)......................4.9 (2)
CORTLAND (DE KALB)............................4.9 (2)
PALOS PARK 1SW (COOK).........................4.9 (2)
WORTH (COOK)..................................4.9 (2)
YORKVILLE 2SE (KENDALL).......................4.8 (2)
OAK LAWN (COOK)...............................4.7 (2)
NAPERVILLE 4SSW (WILL)........................4.7 (2)
LISLE MORTON ARB (DU PAGE)....................4.6 (2)
NEW LENOX 3E (WILL)...........................4.5 (2)
LOCKPORT 1SE (WILL)...........................4.5 (2)
GURNEE 2W (LAKE)..............................4.5 (1)
LAKE FOREST 2NNE (LAKE).......................4.5 (1)
PLAINFIELD (WILL).............................4.4 (2)
MOKENA 1W (WILL)..............................4.4 (2)
HOMEWOOD (COOK)...............................4.4 (2)
WILMINGTON 3SE (WILL).........................4.3 (2)
JOLIET 2N (WILL)..............................4.2 (2)
NEW LENOX 4SE (WILL)..........................4.2 (2)
MONTGOMERY 1SSE (KENDALL).....................4.0 (2)
EARLVILLE 3S (LA SALLE).......................4.0 (2)
DIXON (LEE)...................................4.0 (2)
STEWARD (LEE).................................3.9 (2)
ASHTON (LEE)..................................3.9 (2)
MANHATTAN 2SE (WILL)..........................3.8 (2)
OTTAWA 2N (LA SALLE)..........................3.8 (2)
PLAINFIELD 2SSE (WILL)........................3.6 (2)
OTTAWA 1NW (LA SALLE).........................3.5 (2)
DIXON 2SW (LEE)...............................3.5 (2)
MOMENCE (KANKAKEE)............................3.2 (2)
LA SALLE (LA SALLE)...........................3.2 (2)
CARBON HILL 3.1N (GRUNDY).....................3.2 (2)
COAL CITY 4NNW (GRUNDY).......................3.2 (2)
ST ANNE (KANKAKEE)............................3.0 (2)
MAZON 0.5ENE (GRUNDY).........................3.0 (2)
BOURBONNAIS (KANKAKEE)........................3.0 (2)
MORRIS 6ESE (GRUNDY)..........................2.9 (2)
OTTAWA (LA SALLE).............................2.7 (2)
MINOOKA (GRUNDY)..............................2.6 (2)
PAW PAW (LEE).................................2.5 (2)
MORRIS (GRUNDY)...............................2.5 (2)
BONFIELD 4WSW (KANKAKEE)......................2.5 (2)
ASHKUM 5.6E (IROQUOIS)........................2.4 (2)
STREATOR 4ENE (LA SALLE)......................2.0 (2)
WATSEKA 6.9WNW (IROQUOIS).....................2.0 (2)
MARSEILLES (LA SALLE).........................1.9 (2)
CHATSWORTH (LIVINGSTON).......................1.0 (2)
DWIGHT (LIVINGSTON)...........................1.0 (2)
CHATSWORTH (LIVINGSTON).......................1.0 (2)
INDIANA 2-DAY SNOW FALL
LOCATION (COUNTY): AMT(IN) REPORTS
CHESTERTON 4E (PORTER)........................7.5 (2)
CROWN POINT (LAKE)............................7.2 (2)
(KB9F)VALPARAISO 4S (PORTER)..................7.0 (2)
(W9MAL)MERRILLVILLE 2NNW (LAKE)...............7.0 (2)
VALPARAISO 6WSW (PORTER)......................6.6 (2)
LAKES OF THE FOUR SEASONS 2NNE (PORTER).......6.6 (2)
CROWN POINT 1N (LAKE).........................6.6 (2)
DE MOTTE 1NNW (JASPER)........................6.5 (2)
PORTAGE 3E (PORTER)...........................6.0 (2)
HEBRON 4NE (PORTER)...........................6.0 (2)
PORTER 1S (PORTER)............................5.9 (2)
VALPARAISO 6SSW (PORTER)......................5.5 (2)
DE MOTTE 4SW (JASPER).........................5.5 (2)
VALPARAISO 1SE (PORTER).......................5.3 (2)
REMINGTON (JASPER)............................5.2 (2)
VALPARAISO 4SW (PORTER).......................5.0 (2)
DE MOTTE 6S (JASPER)..........................4.5 (2)
DYER 1WNW (LAKE)..............................4.0 (2)
REMINGTON (JASPER)............................4.0 (2)
RENSSELAER (JASPER)...........................3.1 (2)
MOROCCO (NEWTON)..............................3.0 (2)
CROWN POINT 2WSW (LAKE).......................3.0 (2)
MOUNT AYR 2NNE (NEWTON).......................2.6 (2)
$$
Storm Reports
564
NWUS53 KLOT 192031
LSRLOT
Preliminary Local Storm Report...Summary
National Weather Service Chicago IL
331 PM CDT Tue May 19 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1004 AM Tstm Wnd Gst 2 SSW Marseilles 41.30N 88.73W
05/18/2026 M55 MPH La Salle IL Public
Private weather station southwest of
Marseilles reported 55 mph gust.
1009 AM Tstm Wnd Gst 3 SE Morris 41.32N 88.38W
05/18/2026 M55 MPH Grundy IL Public
Private weather station southeast of Morris
reported 55 mph gust.
1025 AM Tornado 5 WSW Paxton 40.42N 88.18W
05/18/2026 Ford IL Emergency Mngr
A brief EF-0 tornado significantly damaged
an outbuilding at a farmstead along N 1150E
Road just north of E 100N Road near Paxton.
1035 AM Tstm Wnd Dmg 1 SE Aurora 41.74N 88.30W
05/18/2026 Kane IL Public
Public report of large branch broken and
blocking a street near East Aurora High
School. Time estimated by radar.
1045 AM Tstm Wnd Dmg Kankakee 41.12N 87.86W
05/18/2026 Kankakee IL Emergency Mngr
Kankakee County EMA reports widely scattered
tree limbs broken in and near Kankakee. Time
estimated by radar.
1052 AM Tstm Wnd Gst 2 NW Sun River Terrace 41.15N 87.77W
05/18/2026 M56 MPH Kankakee IL Public
Private weather station north of Sun River
Terrace reported 56 mph gust.
1055 AM Tstm Wnd Gst Kankakee Airport 41.07N 87.85W
05/18/2026 M58 MPH Kankakee IL Public
Kankakee airport KIKK AWOS reported 58 mph
wind gust from the west.
1055 AM Tstm Wnd Gst 1 SSE Sun River Terrace 41.11N 87.73W
05/18/2026 M55 MPH Kankakee IL Public
Private weather station KILSAINT69 reported
55 mph gust near Sun River Terrace.
1055 AM Tstm Wnd Dmg Homewood 41.56N 87.66W
05/18/2026 Cook IL Trained Spotter
Trained spotter reports a few 3-4 inch
diameter branches downed in Homewood. Time
estimated by radar.
1058 AM Tstm Wnd Dmg 1 ENE Summit 41.79N 87.80W
05/18/2026 Cook IL 911 Call Center
Power line downed near 56th Street and South
Sayre Avenue in Garfield Ridge community
area of Chicago. Time estimated by radar.
1058 AM Tstm Wnd Dmg 1 SSE Forest View 41.79N 87.79W
05/18/2026 Cook IL 911 Call Center
Tree branch broken and fell onto car near
54th Street and South Normandy Avenue in
Garfield Ridge community area of Chicago.
Time estimated by radar.
1059 AM Tstm Wnd Dmg 1 S Evergreen Park 41.70N 87.70W
05/18/2026 Cook IL 911 Call Center
Tree or tree branch broken, blocking
southbound lane of Troy Street near 106th
Street in Mount Greenwood community area of
Chicago. Time estimated by radar.
1100 AM Tstm Wnd Dmg 1 SSW Archer Hts. - Chi 41.80N 87.73W
05/18/2026 Cook IL 911 Call Center
Tree or tree branch broken, blocking traffic
near Tripp Avenue and 52nd Street in Archer
Heights community area of Chicago. Time
estimated by radar.
1101 AM Tstm Wnd Gst Midway Airport 41.79N 87.75W
05/18/2026 M79 MPH Cook IL ASOS
KMDW ASOS recorded 79 mph wind gust from the
southwest.
1103 AM Tstm Wnd Dmg 1 N Roseland - Chicago 41.72N 87.62W
05/18/2026 Cook IL Public
A few public reports of tree branches broken
in the Roseland community area of Chicago.
Relayed by Chicago 311. Time estimated by
radar.
1107 AM Tstm Wnd Dmg South Chicago 41.74N 87.55W
05/18/2026 Cook IL Public
A few public reports of tree branches broken
in the South Chicago community area of
Chicago. Relayed via Chicago 311. Time
estimated by radar.
1107 AM Tstm Wnd Dmg 2 SSE South Chicago 41.71N 87.54W
05/18/2026 Cook IL 911 Call Center
Large branched downed on roadway near 103rd
Street and Avenue L in East Side community
area of Chicago. Time estimated by radar.
1109 AM Tstm Wnd Dmg 2 WNW Chicago Loop 41.89N 87.67W
05/18/2026 Cook IL 911 Call Center
Tree branch broken onto roadway near Erie
Street and Ashland Avenue in West Town
community area of Chicago. Time estimated by
radar.
1109 AM Tstm Wnd Dmg 1 W Chicago Loop 41.88N 87.65W
05/18/2026 Cook IL 911 Call Center
Power line downed near Jackson Boulevard and
Morgan Street in Near West Side community
area of Chicago. Time estimated by radar.
1113 AM Tstm Wnd Gst Gary Airport 41.62N 87.41W
05/18/2026 M58 MPH Lake IN AWOS
Gary Airport AWOS GYY reported 58 mph wind
gust from the south.
1114 AM Marine Tstm Wind 3 NE Navy Pier 41.92N 87.57W
05/18/2026 M58 MPH LMZ741 IL C-Man Station
Harrison-Dever Crib recorded 50 knot wind
gust.
1114 AM Tstm Wnd Dmg Lakeview - Chicago 41.95N 87.65W
05/18/2026 Cook IL 911 Call Center
Tree or tree branch broken and blocking
roadway near Cornelia Avenue and Fremont
Street in Lakeview community area of
Chicago. Time estimated by radar.
1114 AM Tstm Wnd Gst Lakeview - Chicago 41.95N 87.65W
05/18/2026 M52 MPH Cook IL Public
Private weather station KILCHICA173 reported
52 mph gust.
1115 AM Marine Tstm Wind 1 NE Montrose Harbor 41.97N 87.63W
05/18/2026 M52 MPH LMZ741 IL Mesonet
Mesonet station XMTB Montrose Beach Light.
1121 AM Tstm Wnd Gst 1 SSE Hobart 41.52N 87.25W
05/18/2026 M65 MPH Lake IN Public
Corrects previous report from 1 SSE Hobart
to tstm wind. Public report of 65 mph gust
recorded by backyard weather station near
Linda Street and 10th Street in Hobart. Time
estimated by radar.
1125 AM Tstm Wnd Gst 4 S Brook 40.81N 87.37W
05/18/2026 M54 MPH Newton IN Public
Private weather station northeast of
Kentland reported 54 mph gust.
1129 AM Hail 1 E Lakes of the Four S 41.42N 87.19W
05/18/2026 M1.00 Inch Porter IN Public
Public report of 1.0 inch hail east of
Winfield. Time estimated by radar.
1140 AM Tstm Wnd Gst 2 N Kouts 41.34N 87.02W
05/18/2026 M60 MPH Porter IN Public
Private weather station 1.5 miles north of
Kouts reported 60 mph gust.
1144 AM Marine Tstm Wind 4 NE Beverly Shores 41.73N 86.93W
05/18/2026 M62 MPH LMZ745 IN C-Man Station
Michigan City CMAN station reported 54 kt
gust.
&&
$$
Meteorology
The second snow event of the season, this one also during the weekend, was a longer duration event that was truly made up of two meteorological systems. The first was a minor upper disturbance that produced lift and saturation in an inherent cold atmosphere, favorable for larger dendritic snowflake growth. The second system was about 12 hours later, with occasional flurries/light snow in-between. This second upper level disturbance was a stronger one and steered high moisture northward over the area. The snow caused by this event was a more wet snow, with snowflakes sticking together as they fell. Both "bursts" of snow activity had rates near or over one inch per hour at times north of I-80.
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| December 10, 2016: Radar loop from noon to midnight | December 11, 2016: Radar loop from midnight to noon | December 11, 2016: Radar loop from noon to midnight |
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| December 11, 2016: NWS Chicago Doppler Radar Reflectivity loop from 9 a.m. through 10 p.m. The yellow areas indicate over 30 dBZ echoes of snow that are indicative of a high number of snowflakes or large snowflakes, or both. These echoes were often in stripes correlating with snow bands. The forcing for this was a developing frontogenetic circulation in response to the deepening of the weather system and tightening of the temperature gradient aloft. |
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| December 11, 2016: NWS Chicago Doppler Radar Reflectivity image from 4:45 pm Heavy snow bands across Lake and McHenry Counties southwest through DuPage, Kane, DeKalb, and LaSalle Counties. |
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| December 11, 2016: RAP Analysis of 500 mb at 6 p.m. The colors indicate the mid-level winds and the black lines heights. The short wave trough moving across the Upper Midwest and the associated jet promoted widespread lift and deformation across northern Illinois, which favored the development of the frontogenetic circulation and snow bands. | December 11, 2016: RAP Analysis of Precipitable Water (PWAT) at 3 p.m. Moisture values in excess of 0.6 inches are high for all snow events. Similar to the prior Sunday, the snow became more wet and coupled with the light winds at the surface, it stuck to many objects such as trees. The 6 pm NWS Lincoln, IL weather balloon confirmed these values with 0.71" PWAT observed. |
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| December 10, 2016 6 p.m.: RAP model analysis in far northern Illinois | December 11, 2016 9 a.m.: RAP model analysis in far northern Illinois | December 11, 2016 6 p.m.: RAP model analysis in far northern Illinois |
Additional
Photos
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| Photo courtesy of Christian Lyon, Lakeview area of Chicago, IL | Photo courtesy of Christine McEvilly in the southwest Suburbs |
Links
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