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)
$$
Storm Reports
626
NWUS53 KLOT 302134
LSRLOT
Preliminary Local Storm Report
National Weather Service Chicago IL
434 PM CDT Wed Jul 30 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0424 PM Rain 2 N DeMotte 41.23N 87.20W
07/30/2025 M4.46 Inch Jasper IN Public
Private weather station KINDEMOT28 reported
4.46 inches of rainfall since 1229 PM. 2.8
inches of rainfall occurred in 1 hour period
ending at 159 PM.
0424 PM Rain 4 S Lowell 41.24N 87.41W
07/30/2025 M3.94 Inch Lake IN Public
Private weather station KINLOWEL48 reported
3.94 inches of rainfall since 1144 AM. Most
rainfall occurred in two periods of
approximately 45 minutes.
0424 PM Rain 1 NW Lowell 41.30N 87.43W
07/30/2025 M2.68 Inch Lake IN Public
Private weather station KINLOWEL8 reported
2.68 inches of rain since 1244 PM. Most of
the rainfall occurred in under 1 hour ending
at 230 PM.
0359 PM Rain 3 ESE Manteno 41.23N 87.78W
07/30/2025 M4.54 Inch Kankakee IL Public
Update to previous rain report from 3 ESE
Manteno. Private weather station KILMANTE61
reported 4.54 inches of rainfall since 1214
PM.
0354 PM Rain 1 SW Coal City 41.28N 88.29W
07/30/2025 M3.35 Inch Grundy IL Public
Update to previous rain report from 1 SW
Coal City. Private weather station
KILCOALC32 reported 3.35 inches storm total
since 1139 AM, with most rainfall occurring
in about 45 minutes.
0354 PM Rain 2 SW Coal City 41.28N 88.30W
07/30/2025 M3.57 Inch Grundy IL Public
Update to previous rain report from 2 SW
Coal City. Private weather station
KILCOALC28 reported 3.57 inches of rain
since 1144 AM.
0214 PM Rain 3 ESE Union Hill 41.09N 88.10W
07/30/2025 M3.14 Inch Kankakee IL Public
Update to previous rain report from 3 ESE
Union Hill. Private weather station
KILHERSC10 reported 3.14 inches of rainfall
since 1209 PM.
&&
$$
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 |
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