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
539
NWUS53 KLOT 021443
LSRLOT
Preliminary Local Storm Report
National Weather Service Chicago IL
943 AM CDT Sun Aug 2 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 AM Rain 2 SSW Frankfort Square 41.49N 87.81W
08/02/2026 M4.94 Inch Will IL Cocorahs
Cocorahs station IL-WL-165 Frankfort 1 ESE.
0700 AM Rain 1 SE Flossmoor 41.53N 87.66W
08/02/2026 M4.78 Inch Cook IL Cocorahs
Cocorahs station IL-CK-229 Flossmoor 1 SE.
0830 AM Rain 2 WNW Montgomery 41.74N 88.38W
08/02/2026 M4.46 Inch Kane IL Mesonet
Mesonet station BBMI2 Montgomery -
Blackberry Cr.
0700 AM Rain 2 N Hammond 41.61N 87.49W
08/02/2026 M4.27 Inch Lake IN Cocorahs
Cocorahs station IN-LK-89 Hammond 2 N.
0700 AM Rain 2 NW Rockdale 41.53N 88.14W
08/02/2026 M4.18 Inch Will IL Cocorahs
Cocorahs station IL-WL-175 Rockdale 1 NW.
0700 AM Rain 3 N Carbon Hill 41.34N 88.30W
08/02/2026 M4.18 Inch Grundy IL Cocorahs
Cocorahs station IL-GY-1 Carbon Hill 3 N.
0700 AM Rain 3 N Carbon Hill 41.34N 88.30W
08/02/2026 M4.18 Inch Grundy IL CO-OP Observer
CO-OP Observer station CTYI2 Coal City 4
NNW.
0500 AM Rain 1 N Park Forest 41.50N 87.68W
08/02/2026 M3.68 Inch Cook IL CO-OP Observer
CO-OP Observer station PKFI2 Park Forest.
0600 AM Rain 1 W Joliet 41.53N 88.11W
08/02/2026 M3.66 Inch Will IL Cocorahs
Cocorahs station IL-WL-174 Joliet 0.8 E.
0700 AM Rain Burr Ridge 41.75N 87.91W
08/02/2026 M3.63 Inch Cook IL Cocorahs
Cocorahs station IL-CK-394 Burr Ridge.
0800 AM Rain 2 S Woodridge 41.73N 88.05W
08/02/2026 M3.62 Inch DuPage IL Cocorahs
Cocorahs station IL-DP-174 Bolingbrook 2.6
NE.
0700 AM Rain 3 NNW Carbon Hill 41.33N 88.31W
08/02/2026 M3.61 Inch Grundy IL Cocorahs
Cocorahs station IL-GY-16 Carbon Hill 3 NNW.
0700 AM Rain NWS Chicago-Romeoville 41.60N 88.09W
08/02/2026 M3.49 Inch Will IL CO-OP Observer
CO-OP Observer station LOTI2 Romeoville -
NWS Chicago.
0700 AM Rain 1 NNE Oak Park 41.91N 87.78W
08/02/2026 M3.49 Inch Cook IL Cocorahs
Cocorahs station IL-CK-74 Oak Park 1 NNE.
0700 AM Rain 3 ESE Manhattan 41.41N 87.93W
08/02/2026 M3.38 Inch Will IL Cocorahs
Cocorahs station IL-WL-198 Manhattan 3.5
ESE.
0700 AM Rain 3 NNW Lake Station 41.62N 87.25W
08/02/2026 M3.37 Inch Lake IN Cocorahs
Cocorahs station IN-LK-63 Gary 5 ENE.
0700 AM Rain 4 ESE Aurora 41.73N 88.24W
08/02/2026 M3.36 Inch DuPage IL Cocorahs
Cocorahs station IL-DP-101 Aurora 4 ESE.
0800 AM Rain Minooka 41.45N 88.25W
08/02/2026 M3.34 Inch Grundy IL Cocorahs
Cocorahs station IL-GY-10 Minooka.
0700 AM Rain 1 S Woodridge 41.74N 88.05W
08/02/2026 M3.34 Inch DuPage IL Cocorahs
Cocorahs station IL-DP-198 Woodridge 0.3 SW.
0600 AM Rain 1 SSE Boulder Hill 41.70N 88.33W
08/02/2026 M3.32 Inch Kendall IL Cocorahs
Cocorahs station IL-KD-136 Oswego.
0800 AM Rain 2 WSW Goodenow 41.38N 87.68W
08/02/2026 M3.28 Inch Will IL Cocorahs
Cocorahs station IL-WL-149 Monee 5 SE.
0700 AM Rain 1 SSW Yorkville 41.63N 88.46W
08/02/2026 M3.19 Inch Kendall IL Cocorahs
Cocorahs station IL-KD-110 Yorkville 0.9
SSW.
0700 AM Rain 1 NW Clarendon Hills 41.80N 87.97W
08/02/2026 M3.19 Inch DuPage IL Cocorahs
Cocorahs station IL-DP-122 Clarendon Hills 1
NW.
0700 AM Rain 1 NNE Park Forest 41.49N 87.68W
08/02/2026 M3.13 Inch Cook IL Cocorahs
Cocorahs station IL-CK-69 Park Forest 1 NNE.
0600 AM Rain 2 SE Boulder Hill 41.69N 88.31W
08/02/2026 M3.12 Inch Kendall IL Cocorahs
Cocorahs station IL-KD-126 Boulder Hill.
0700 AM Rain 1 N Shorewood 41.53N 88.20W
08/02/2026 M3.10 Inch Will IL Cocorahs
Cocorahs station IL-WL-122 Shorewood.
0700 AM Rain 3 NE Carbon Hill 41.33N 88.27W
08/02/2026 M3.10 Inch Grundy IL Cocorahs
Cocorahs station IL-GY-21 Carbon Hill 3 NE.
0830 AM Rain 1 SW Irving Park - Chic 41.95N 87.73W
08/02/2026 M3.08 Inch Cook IL Cocorahs
Cocorahs station IL-CK-429 Harwood Heights
4.0 ESE.
0700 AM Rain 1 SE Elmhurst 41.89N 87.93W
08/02/2026 M3.05 Inch DuPage IL Cocorahs
Cocorahs station IL-DP-109 Elmhurst 0.8 ESE.
0629 AM Rain 1 ESE Villa Park 41.88N 87.96W
08/02/2026 M2.97 Inch DuPage IL Cocorahs
Cocorahs station IL-DP-178 Villa Park.
0800 AM Rain 2 WNW Bull Valley 42.32N 88.39W
08/02/2026 M2.93 Inch McHenry IL Cocorahs
Cocorahs station IL-MCH-13 Bull Valley 2
WNW.
0700 AM Rain 1 N Lynwood 41.54N 87.54W
08/02/2026 M2.93 Inch Cook IL CO-OP Observer
CO-OP Observer station LNSI2 Lansing.
0700 AM Rain 1 ESE Albany Park - Chi 41.96N 87.70W
08/02/2026 M2.82 Inch Cook IL Cocorahs
Cocorahs station IL-CK-323 Chicago - Albany
Park.
0630 AM Rain 3 N New Lenox 41.56N 87.96W
08/02/2026 M2.77 Inch Will IL Cocorahs
Cocorahs station IL-WL-180 Mokena 4 WNW.
0600 AM Rain Batavia 41.85N 88.31W
08/02/2026 M2.77 Inch Kane IL CO-OP Observer
CO-OP Observer station BATI2 Batavia.
0700 AM Rain 1 S Oak Park 41.87N 87.79W
08/02/2026 M2.77 Inch Cook IL Cocorahs
Cocorahs station IL-CK-426 Oak Park 1.0 SSE.
0700 AM Rain 2 SSE Plainfield 41.58N 88.19W
08/02/2026 M2.75 Inch Will IL Cocorahs
Cocorahs station IL-WL-51 Plainfield 2 SSE.
0700 AM Rain North Aurora 41.81N 88.33W
08/02/2026 M2.75 Inch Kane IL Cocorahs
Cocorahs station IL-KN-160 North Aurora 0.3
NNE.
0700 AM Rain Wilmington 41.30N 88.14W
08/02/2026 M2.71 Inch Will IL Cocorahs
Cocorahs station IL-WL-164 Wilmington.
0630 AM Rain 1 SE Lakewood Shores 41.27N 88.13W
08/02/2026 M2.70 Inch Will IL Cocorahs
Cocorahs station IL-WL-73 Lakewood Shores 1
SE.
0700 AM Rain 3 SE Naperville 41.74N 88.12W
08/02/2026 M2.69 Inch DuPage IL Cocorahs
Cocorahs station IL-DP-78 Naperville 3 SE.
0800 AM Rain Lombard 41.88N 88.02W
08/02/2026 M2.67 Inch DuPage IL Cocorahs
Cocorahs station IL-DP-187 Lombard.
0700 AM Rain 1 NNW Sugar Grove 41.78N 88.45W
08/02/2026 M2.66 Inch Kane IL Cocorahs
Cocorahs station IL-KN-4 Sugar Grove 1 NNW.
0700 AM Rain 4 ENE Buckley 40.62N 87.96W
08/02/2026 M2.64 Inch Iroquois IL Cocorahs
Cocorahs station IL-IR-26 Buckley 4 ENE.
0600 AM Rain 1 NW Sammons Point 41.05N 87.88W
08/02/2026 M2.63 Inch Kankakee IL Cocorahs
Cocorahs station IL-KK-53 Chebanse 3.7 NNE.
0700 AM Rain 1 NNW Oak Forest 41.62N 87.75W
08/02/2026 M2.60 Inch Cook IL Cocorahs
Cocorahs station IL-CK-306 Oak Forest 1 NNW.
0700 AM Rain 2 W Oakwood Hills 42.25N 88.28W
08/02/2026 M2.55 Inch McHenry IL Cocorahs
Cocorahs station IL-MCH-109 Crystal Lake 2.9
ENE.
0800 AM Rain Winthrop Harbor 42.48N 87.83W
08/02/2026 M2.53 Inch Lake IL Cocorahs
Cocorahs station IL-LK-23 Winthrop Harbor.
0600 AM Rain 1 NNE Homer Glen 41.61N 87.93W
08/02/2026 M2.51 Inch Will IL Cocorahs
Cocorahs station IL-WL-131 Homer Glen 1 NNE.
0815 AM Rain 1 SSE Boulder Hill 41.70N 88.33W
08/02/2026 M2.50 Inch Kendall IL Mesonet
Mesonet station WBOI2 Oswego - Waubonsee Cr.
0800 AM Rain 2 SSW Lincoln Park - Ch 41.90N 87.66W
08/02/2026 M2.50 Inch Cook IL Cocorahs
Cocorahs station IL-CK-469 Chicago 1.9 NW.
0700 AM Rain Midlothian 41.63N 87.72W
08/02/2026 M2.49 Inch Cook IL Cocorahs
Cocorahs station IL-CK-253 Midlothian.
0700 AM Rain Chicago Ridge 41.70N 87.78W
08/02/2026 M2.47 Inch Cook IL Cocorahs
Cocorahs station IL-CK-152 Chicago Ridge.
0800 AM Rain Dixon 41.84N 89.49W
08/02/2026 M2.46 Inch Lee IL Mesonet
Mesonet station DXRI2 Dixon - Rock R.
0700 AM Rain Porter 41.62N 87.08W
08/02/2026 M2.43 Inch Porter IN Cocorahs
Cocorahs station IN-PT-69 Porter.
0700 AM Rain 2 NNW Dwight 41.12N 88.45W
08/02/2026 M2.42 Inch Grundy IL Cocorahs
Cocorahs station IL-GY-38 Dwight 2.2 NNW.
0600 AM Rain Chebanse 41.01N 87.91W
08/02/2026 M2.41 Inch Kankakee IL Cocorahs
Cocorahs station IL-KK-28 Chebanse.
0700 AM Rain 1 S Burns Harbor 41.59N 87.13W
08/02/2026 M2.39 Inch Porter IN Cocorahs
Cocorahs station IN-PT-80 Portage 3 E.
0700 AM Rain 1 W Peotone 41.33N 87.80W
08/02/2026 M2.39 Inch Will IL CO-OP Observer
CO-OP Observer station PEOI2 Peotone.
0700 AM Rain 2 W Morris 41.35N 88.45W
08/02/2026 M2.39 Inch Grundy IL Cocorahs
Cocorahs station IL-GY-28 Morris 2 W.
0700 AM Rain 2 SSE Streator 41.10N 88.82W
08/02/2026 M2.34 Inch Livingston IL CO-OP Observer
CO-OP Observer station STAI2 Streator.
1158 PM Rain 1 S Burbank 41.73N 87.77W
08/01/2026 M2.34 Inch Cook IL CO-OP Observer
CO-OP Observer station MDWI2 Midway 3 SW
COOP.
0730 AM Rain 2 SE Darien 41.73N 87.95W
08/02/2026 M2.26 Inch DuPage IL Cocorahs
Cocorahs station IL-DP-79 Darien 2 SE.
0700 AM Rain Grand Ridge 41.23N 88.83W
08/02/2026 M2.25 Inch La Salle IL Cocorahs
Cocorahs station IL-LS-76 Grand Ridge 0.2
SSW.
0730 AM Rain Oak Lawn 41.71N 87.75W
08/02/2026 M2.25 Inch Cook IL Cocorahs
Cocorahs station IL-CK-149 Oak Lawn.
0700 AM Rain 3 NNW Lakewood 42.26N 88.40W
08/02/2026 M2.24 Inch McHenry IL Cocorahs
Cocorahs station IL-MCH-107 Crystal Lake 3.9
WNW.
0700 AM Rain 2 SSE Dwight 41.07N 88.41W
08/02/2026 M2.21 Inch Livingston IL Cocorahs
Cocorahs station IL-LV-28 Dwight 2.3 SSE.
0600 AM Rain 2 WSW Kankakee 41.11N 87.89W
08/02/2026 M2.21 Inch Kankakee IL Cocorahs
Cocorahs station IL-KK-45 Kankakee 1.4 WSW.
0700 AM Rain 3 NNE Valparaiso 41.52N 87.04W
08/02/2026 M2.17 Inch Porter IN Cocorahs
Cocorahs station IN-PT-179 Valparaiso 3.0
NNE.
&&
$$
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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