Dangerous, prolonged heat is expected across portions of the Central and Southeast U.S. through July. Scattered severe thunderstorms are expected over parts of the northern Plains into the upper Mississippi Valley today, with damaging winds and large hail as the primary threats. Heavy rainfall could lead to areas of flooding across the northern Plains, Upper Midwest, Southeast and Southwest. Read More >
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Information on this page is preliminary and will be updated over the coming days.
Fast Facts
Snow Totals
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| Interpolated and estimated local 24-hour snowfall ending at 10:00 AM CST 2/18/2022 (Courtesy of the Iowa Environmental Mesonet) | Interpolated and estimated regional 24-hour snowfall ending at 10:00 AM CST 2/18/2022 (Courtesy of the Iowa Environmental Mesonet) |
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PRELIMINARY SNOWFALL REPORTS FROM THE THURSDAY, FEBRUARY 17 EVENT 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. ---------------------------------------------------------------------- Location Amount Time/Date MOROCCO 9.0 IN 0950 PM 02/17 2 SE CROWN POINT 8.0 IN 0900 PM 02/17 RENSSELAER 8.0 IN 0948 PM 02/17 GIBSON CITY 8.0 IN 0850 PM 02/17 HOBART 7.5 IN 0900 PM 02/17 SOUTH HAVEN 7.3 IN 0852 PM 02/17 CHESTERTON 4 ESE 7.0 IN 0700 AM 02/18 STRAWN 7.0 IN 0850 PM 02/17 BOONE GROVE 2 WNW 6.6 IN 0700 AM 02/18 VALPARAISO 1 N 6.5 IN 0700 AM 02/18 KANKAKEE 1.4 WSW 6.5 IN 0600 AM 02/18 CHESTERTON 6.0 IN 0900 PM 02/17 LOWELL 6.0 IN 0900 PM 02/17 DEMOTTE 6.0 IN 0600 AM 02/18 FAIRBURY 6.0 IN 0700 AM 02/18 CRESCENT CITY 2 N 6.0 IN 0600 AM 02/18 PORTER 5.8 IN 0700 AM 02/18 DYER 5.6 IN 0600 AM 02/18 ST. JOHN 3 SSE 5.6 IN 0700 AM 02/18 PORTER 5.5 IN 0900 PM 02/17 ASHKUM 6 E 5.5 IN 0700 AM 02/18 2 NNE CROWN POINT 5.4 IN 0800 PM 02/17 ST. JOHN 5.4 IN 0600 AM 02/18 CROWN POINT 2 NNE 5.4 IN 0730 AM 02/18 CROWN POINT 5.4 IN 0730 AM 02/18 1 SW BRADLEY 5.2 IN 0515 PM 02/17 GENEVA 4 WSW 5.2 IN 0600 AM 02/18 SCHERERVILLE 5.0 IN 0900 PM 02/17 RENSSELAER 2 SW 5.0 IN 0730 AM 02/18 CHATSWORTH 5.0 IN 0735 PM 02/17 MARSEILLES 3 W 5.0 IN 0600 AM 02/18 KANKAKEE 5.0 IN 0700 AM 02/18 MILFORD 3.5 ENE 5.0 IN 0700 AM 02/18 PARK FOREST 5.0 IN 0500 AM 02/18 3 W IRWIN 4.8 IN 1015 PM 02/17 SOUTH SHORE - CHICAGO 4.8 IN 0800 PM 02/17 BOURBONNAIS 4.7 IN 0700 AM 02/18 1 N LYNWOOD 4.7 IN 0715 PM 02/17 BEVERLY SHORES 0.8 W 4.5 IN 0800 AM 02/18 LOCKPORT 2 SE 4.5 IN 0700 AM 02/18 OSWEGO 1 SSE 4.5 IN 0700 AM 02/18 ST. ANNE 4.5 IN 0700 AM 02/18 BATAVIA 1 NW 4.5 IN 0700 AM 02/18 GENEVA 1 SSW 4.5 IN 0730 AM 02/18 WATSEKA 4.5 IN 0655 PM 02/17 MINOOKA 4.5 IN 0800 AM 02/18 WEST RIDGE - CHICAGO 4.5 IN 0715 PM 02/17 JOLIET 4.4 IN 0730 PM 02/17 1 NW ROCKDALE 4.4 IN 0700 AM 02/18 PEOTONE 4.3 IN 0731 PM 02/17 1 NNW ROCKDALE 4.3 IN 0957 PM 02/17 PEOTONE 4.3 IN 0700 AM 02/18 SOMONAUK 4.3 IN 0520 PM 02/17 CHICAGO - WEST RIDGE 4.3 IN 0700 AM 02/18 2 WSW KANKAKEE 4.2 IN 0336 PM 02/17 NORTH AURORA 1 ENE 4.2 IN 0742 AM 02/18 OAK LAWN 2 WNW 4.2 IN 0800 AM 02/18 NWS CHICAGO-ROMEOVILLE 4.1 IN 1100 PM 02/17 ROMEOVILLE - NWS CHICAGO 4.1 IN 0600 AM 02/18 CHICAGO RIDGE 4.1 IN 0700 AM 02/18 OAK LAWN 1 WSW 4.1 IN 0800 AM 02/18 BOONE GROVE 4 NNE 4.0 IN 0530 AM 02/18 MOKENA 2 WSW 4.0 IN 0700 AM 02/18 2 ENE LIMESTONE 4.0 IN 0300 PM 02/17 HERSCHER 3 E 4.0 IN 0830 AM 02/18 ST. CHARLES 4.0 IN 0715 PM 02/17 ST. CHARLES 1 ENE 4.0 IN 0800 AM 02/18 3 SSE NAPERVILLE 4.0 IN 0739 PM 02/17 1 NE ROSELLE 4.0 IN 0645 PM 02/17 NILES 4.0 IN 0730 PM 02/17 BRIDGEVIEW 1 WNW 4.0 IN 0730 AM 02/18 CARBON HILL 3 NNW 3.9 IN 0700 AM 02/18 OAK LAWN 3.9 IN 0715 PM 02/17 HOMEWOOD 3.9 IN 0855 PM 02/17 HOMEWOOD 3.9 IN 0700 AM 02/18 OAK LAWN 3.9 IN 0730 AM 02/18 GARY 5 ENE 3.8 IN 0700 AM 02/18 AURORA 3.8 IN 0700 AM 02/18 3.0 SW MIDWAY AIRPORT 3.8 IN 0815 PM 02/17 MIDWAY 3 SW 3.8 IN 0600 AM 02/18 OAK PARK 1 NNE 3.8 IN 0650 AM 02/18 STREAMWOOD 1.1 WSW 3.8 IN 0700 AM 02/18 PLAINFIELD 2 SSE 3.7 IN 0700 AM 02/18 CRETE 3 E 3.7 IN 0700 AM 02/18 BATAVIA 3.4 WSW 3.7 IN 0630 AM 02/18 AURORA 3 WSW 3.7 IN 0700 AM 02/18 1 ENE WINFIELD 3.7 IN 0700 PM 02/17 1 SW JOLIET 3.6 IN 0530 PM 02/17 BATAVIA 3.6 IN 0705 PM 02/17 AURORA 2 W 3.6 IN 0700 AM 02/18 DARIEN 2 SE 3.6 IN 0700 AM 02/18 OGDEN DUNES 3.5 IN 0530 AM 02/18 VALPARAISO 4 SW 3.5 IN 0600 AM 02/18 MOKENA 3.5 IN 0600 PM 02/17 MOKENA 1 W 3.5 IN 0700 AM 02/18 PERU 1 NNE 3.5 IN 0700 AM 02/18 GENEVA 3.5 IN 0700 AM 02/18 GENEVA 2 WNW 3.5 IN 0700 AM 02/18 GENEVA 1 SSW 3.5 IN 0800 AM 02/18 MORRIS 2 W 3.5 IN 0700 AM 02/18 1 E NAPERVILLE 3.5 IN 0741 PM 02/17 GLEN ELLYN 1 W 3.5 IN 0700 AM 02/18 1 ENE EVANSTON 3.5 IN 0643 PM 02/17 CHICAGO - WEST RIDGE 3.5 IN 0700 AM 02/18 1 NNE HOMER GLEN 3.4 IN 0246 AM 02/18 HOMER GLEN 1 NNE 3.4 IN 0700 AM 02/18 BATAVIA 3.4 IN 0730 AM 02/18 GENEVA 3.4 IN 0800 AM 02/18 1 WNW ARLINGTON HEIGHTS 3.4 IN 0704 PM 02/17 ROSELAWN 3 ENE 3.3 IN 0700 AM 02/18 4 N PLAINFIELD 3.3 IN 0830 PM 02/17 NEW LENOX 1 SE 3.3 IN 0800 AM 02/18 1 SSW DEERFIELD 3.3 IN 0721 PM 02/17 BATAVIA 3.3 IN 0600 AM 02/18 WEST CHICAGO 4 SE 3.3 IN 0645 AM 02/18 SCHAUMBURG 2.9 WSW 3.3 IN 0700 AM 02/18 SCHAUMBURG 1.4 SE 3.3 IN 0700 AM 02/18 HOFFMAN ESTATES 3.3 IN 0700 AM 02/18 3 NNW VALPARAISO 3.3 IN 0400 PM 02/17 LA SALLE 3.2 IN 0700 AM 02/18 3 N CARBON HILL 3.2 IN 0730 PM 02/17 CARBON HILL 3 N 3.2 IN 0700 AM 02/18 COAL CITY 4 NNW 3.2 IN 0700 AM 02/18 VILLA PARK 3.2 IN 0700 AM 02/18 1 N MEDINAH 3.2 IN 0600 PM 02/17 ELK GROVE VILLAGE 2 WSW 3.2 IN 0645 AM 02/18 HOFFMAN ESTATES 5 W 3.2 IN 0830 AM 02/18 NEW LENOX 1 SSE 3.1 IN 0700 AM 02/18 MORTON ARBORETUM 3.1 IN 0700 AM 02/18 WANATAH 3.0 IN 0700 AM 02/18 1 WSW CREST HILL 3.0 IN 0710 PM 02/17 JOLIET 2 N 3.0 IN 0700 AM 02/18 OTTAWA 3.0 IN 0510 AM 02/18 OTTAWA 1 N 3.0 IN 0700 AM 02/18 1 WNW AURORA 3.0 IN 0523 PM 02/17 MORRIS 1 NW 3.0 IN 0800 AM 02/18 3 NE DUPAGE AIRPORT 3.0 IN 0700 PM 02/17 NAPERVILLE 3 SE 3.0 IN 0700 AM 02/18 NAPERVILLE 3 SE 3.0 IN 0700 AM 02/18 AURORA 4 ESE 3.0 IN 0700 AM 02/18 WEST CHICAGO 4 NNE 3.0 IN 0700 AM 02/18 BOLINGBROOK 3 NE 3.0 IN 0710 AM 02/18 ELK GROVE VILLAGE 1 ESE 3.0 IN 0700 AM 02/18 OAK FOREST 1 NNW 3.0 IN 0700 AM 02/18 OHARE AIRPORT 2.9 IN 0800 PM 02/17 HARWOOD HEIGHTS 2.9 IN 0700 AM 02/18 NAPERVILLE 5 SSW 2.8 IN 0700 AM 02/18 MONEE 5 SE 2.8 IN 0800 AM 02/18 ELGIN 1 SSW 2.8 IN 0800 AM 02/18 ELGIN 2.8 IN 0800 AM 02/18 CLARENDON HILLS 2.8 IN 0700 AM 02/18 MOUNT PROSPECT 0.2 NNE 2.8 IN 0630 AM 02/18 PARK RIDGE 1 WNW 2.8 IN 0730 AM 02/18 SCHAUMBURG 2 E 2.7 IN 0700 AM 02/18 CAMPTON HILLS 3 NNE 2.6 IN 0700 AM 02/18 1 N DOUGLAS - CHICAGO 2.6 IN 0956 PM 02/17 PLAINFIELD 1.7 WNW 2.5 IN 0700 AM 02/18 PAW PAW 2 S 2.5 IN 0700 AM 02/18 PLAINFIELD 4 SW 2.5 IN 0700 AM 02/18 3 N ST. CHARLES 2.5 IN 0453 PM 02/17 ELGIN 3 W 2.5 IN 0700 AM 02/18 NAPERVILLE 2.5 IN 0600 AM 02/18 PALOS PARK 2 WSW 2.5 IN 0700 AM 02/18 PARK FOREST 1 WNW 2.5 IN 0730 AM 02/18 FRANKLIN PARK 0.5 SSE 2.5 IN 0800 AM 02/18 MANHATTAN 5 ENE 2.2 IN 0800 AM 02/18 MANHATTAN 5 ENE 2.2 IN 0800 AM 02/18 1 W SOMONAUK 2.2 IN 0345 PM 02/17 HIGHWOOD 2.1 IN 0637 PM 02/17 RIVERWOODS 1 NE 2.1 IN 0700 AM 02/18 BANNOCKBURN 2.1 IN 0700 AM 02/18 NAPERVILLE 4 SE 2.0 IN 0815 AM 02/18 OTTAWA - BUFFALO ROCK SP 2.0 IN 0732 AM 02/18 PALATINE 1.2 NW 2.0 IN 0700 AM 02/18 EVANSTON 1 E 2.0 IN 0800 AM 02/18 BUFFALO GROVE 2 N 1.9 IN 0700 AM 02/18 ELGIN 1.6 IN 0700 AM 02/18 BARRINGTON 1.5 IN 0800 AM 02/18 PALATINE 1 NNE 1.4 IN 0700 AM 02/18 MUNDELEIN 4 WSW 1.3 IN 0700 AM 02/18 FOREST LAKE 1 SSW 1.3 IN 0700 AM 02/18 SUBLETTE 3 WNW 1.2 IN 0730 AM 02/18 ALGONQUIN 1 NNW 1.0 IN 0545 AM 02/18 TROUT VALLEY 1.0 IN 0630 AM 02/18 MUNDELEIN 1 NNE 1.0 IN 0800 AM 02/18 CORTLAND 1.0 IN 0600 AM 02/18 DEKALB 1.0 IN 0700 AM 02/18 CHESTERTON 2 E 0.8 IN 0630 AM 02/18 MUNDELEIN 1.6 WNW 0.8 IN 0730 AM 02/18 GENOA 0.8 IN 0700 AM 02/18 DEKALB 0.7 IN 0700 AM 02/18 CRYSTAL LAKE 0.5 IN 1000 PM 02/17 HUNTLEY 0.5 IN 0700 AM 02/18 MCHENRY LOCK AND DAM 0.5 IN 0800 AM 02/18 FOX LAKE HILLS 0.5 IN 0700 AM 02/18 GRANDWOOD PARK 1 SE 0.5 IN 0700 AM 02/18 LONG LAKE 0.5 IN 0700 AM 02/18 STEWARD 3 S 0.4 IN 0700 AM 02/18 LAKEWOOD 0.3 IN 0900 PM 02/17 CRYSTAL LAKE 1 WSW 0.3 IN 0700 AM 02/18 MCHENRY 1 ENE 0.3 IN 0900 AM 02/18 WAUKEGAN 2 N 0.3 IN 0800 AM 02/18 WOODSTOCK 5 NW 0.2 IN 0700 AM 02/18 MARENGO 0.2 IN 0700 AM 02/18 WOODSTOCK 4 SW 0.2 IN 0800 AM 02/18 BULL VALLEY 2 WNW 0.1 IN 0800 AM 02/18 ASHTON 0.1 IN 0700 AM 02/18 TIMBERLANE 1 SW 0.1 IN 0900 AM 02/18 4 NNW ROCKFORD T IN 0700 AM 02/18 MARENGO T IN 0700 AM 02/18 HARVARD 4.4 NNE T IN 0700 AM 02/18 AMBOY 1 WSW T IN 0618 AM 02/18 CAPRON T IN 0700 AM 02/18 |
Rainfall Totals
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PRELIMINARY RAINFALL REPORTS FROM WEDNESDAY, FEBRUARY 16 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. ---------------------------------------------------------------------- Location Amount Time/Date Provider ...Illinois... ...Cook County... Countryside 1 ENE 1.45 in 0500 AM 02/17 COCORAHS Indian Head Park 1.34 in 0700 AM 02/17 COCORAHS Merrionette Park 1.7 NE 1.31 in 0800 AM 02/17 COCORAHS Chicago Midway 1.27 in 0953 AM 02/17 ASOS Chicago - Hyde Park 1.25 in 0600 AM 02/17 COCORAHS Oak Lawn 1.25 in 0715 AM 02/17 COCORAHS Oak Park 1 NNE 1.14 in 0635 AM 02/17 COCORAHS Bridgeview 1 WNW 1.12 in 0730 AM 02/17 COCORAHS North Center - Chicago 1.11 in 0700 AM 02/17 COCORAHS Schaumburg 2 E 1.11 in 0700 AM 02/17 COCORAHS Streamwood 1.1 WSW 1.08 in 0700 AM 02/17 COCORAHS Hoffman Estates 1.08 in 0700 AM 02/17 COCORAHS Forest Park 1 ENE 1.06 in 0700 AM 02/17 COCORAHS Evergreen Park 1.06 in 0730 AM 02/17 COCORAHS Harwood Heights 1.05 in 0700 AM 02/17 COCORAHS Oak Forest 0.6 SSE 1.04 in 0700 AM 02/17 COCORAHS Arlington Heights 2 NNW 1.03 in 0652 AM 02/17 COCORAHS Evanston 1 E 1.01 in 0800 AM 02/17 COCORAHS Chicago Ridge 1.00 in 0700 AM 02/17 COCORAHS Evanston 1.2 S 1.00 in 0710 AM 02/17 COCORAHS Franklin Park 0.5 SSE 0.99 in 0800 AM 02/17 COCORAHS Hoffman Estates 5 W 0.99 in 0900 AM 02/17 COCORAHS Chicago O`Hare 0.97 in 0600 AM 02/17 ASOS Midlothian 0.97 in 0700 AM 02/17 COCORAHS Palos Park 2 WSW 0.96 in 0700 AM 02/17 COCORAHS Chicago - Albany Park 0.95 in 0700 AM 02/17 COCORAHS Chicago - West Ridge 0.94 in 0700 AM 02/17 COCORAHS Wheeling - Chicago Exec. Arp 0.93 in 0952 AM 02/17 ASOS Elk Grove Village 2 WSW 0.92 in 0705 AM 02/17 COCORAHS Morton Grove 1 WNW 0.89 in 0700 AM 02/17 COCORAHS Palatine 1.2 NW 0.88 in 0700 AM 02/17 COCORAHS Evanston 1 SSW 0.87 in 0800 AM 02/17 COCORAHS Elk Grove Village 1 ESE 0.86 in 0600 AM 02/17 COCORAHS Palatine 1 NNE 0.86 in 0700 AM 02/17 COCORAHS Park Ridge 1 WNW 0.86 in 0730 AM 02/17 COCORAHS Mount Prospect 0.2 NNE 0.85 in 0700 AM 02/17 COCORAHS Homewood 0.74 in 0700 AM 02/17 COCORAHS Barrington 0.70 in 0800 AM 02/17 COOP Park Forest 0.69 in 0500 AM 02/17 COOP ...De Kalb County... Earlville 5 NNE 0.84 in 0700 AM 02/17 COCORAHS Cortland 0.76 in 0600 AM 02/17 COCORAHS Genoa 0.71 in 0700 AM 02/17 COOP Malta 3 ESE 0.68 in 0700 AM 02/17 COCORAHS ...DuPage County... Clarendon Hills 1.53 in 0700 AM 02/17 UCOOP Darien 2 SE 1.45 in 0700 AM 02/17 COCORAHS Bolingbrook 3 NE 1.24 in 0700 AM 02/17 COCORAHS Lisle 1 SSE 1.12 in 0700 AM 02/17 COCORAHS Aurora 4 NE 1.02 in 0850 AM 02/17 COCORAHS Villa Park 1.01 in 0700 AM 02/17 COCORAHS Elmhurst 1 SE 1.01 in 0700 AM 02/17 COCORAHS Morton Arboretum 1.00 in 0700 AM 02/17 COOP Winfield 1.00 in 0700 AM 02/17 COCORAHS Glen Ellyn 1 SW 0.99 in 0730 AM 02/17 COCORAHS West Chicago 4 SE 0.98 in 0635 AM 02/17 COCORAHS Lombard 1.0 WSW 0.95 in 0700 AM 02/17 COCORAHS Glen Ellyn 1 W 0.94 in 0700 AM 02/17 COCORAHS Naperville 0.92 in 1015 AM 02/17 UCOOP Elmhurst 1 SW 0.91 in 0600 AM 02/17 COCORAHS Bloomingdale 1 SSE 0.90 in 0700 AM 02/17 COCORAHS West Chicago - DuPage Arpt. 0.81 in 1013 AM 02/17 ASOS ...Ford County... Gibson City 3 WNW 0.75 in 0700 AM 02/17 COCORAHS Melvin 4 WSW 0.74 in 0700 AM 02/17 COCORAHS ...Grundy County... Morris 5 NNW 0.85 in 0700 AM 02/17 COCORAHS Minooka 0.79 in 0800 AM 02/17 COCORAHS Morris 1 NW 0.77 in 0800 AM 02/17 COOP ...Iroquois County... Milford 3.5 ENE 1.07 in 0700 AM 02/17 COCORAHS Crescent City 2 N 0.94 in 0600 AM 02/17 COCORAHS Ashkum 6 E 0.88 in 0600 AM 02/17 COCORAHS Chebanse 0.77 in 0800 AM 02/17 COCORAHS ...Kane County... Geneva 1 SSW 1.21 in 0730 AM 02/17 COCORAHS Campton Hills 3 NNE 0.99 in 0700 AM 02/17 COCORAHS Aurora 2 W 0.98 in 0700 AM 02/17 COCORAHS Sugar Grove 1 NNW 0.97 in 0700 AM 02/17 COCORAHS Elgin 1 SSW 0.97 in 0800 AM 02/17 COCORAHS Elgin 0.97 in 0800 AM 02/17 UCOOP North Aurora 1 ENE 0.96 in 0715 AM 02/17 COCORAHS Geneva 1 SSW 0.95 in 0700 AM 02/17 COCORAHS Geneva 4 WSW 0.93 in 0400 AM 02/17 COCORAHS Elgin 3 W 0.93 in 0700 AM 02/17 COCORAHS Batavia 3.4 WSW 0.92 in 0600 AM 02/17 COCORAHS Aurora 0.92 in 0700 AM 02/17 COOP Sugar Grove - Aurora Arpt. 0.92 in 0952 AM 02/17 ASOS Batavia 1 NW 0.91 in 0700 AM 02/17 COCORAHS Geneva 2 WNW 0.86 in 0700 AM 02/17 COCORAHS Elgin 0.86 in 0700 AM 02/17 COOP Kaneville 3 NNW 0.78 in 0700 AM 02/17 COCORAHS ...Kankakee County... Kankakee 0.79 in 0700 AM 02/17 COOP St. Anne 0.78 in 0700 AM 02/17 COOP Bradley 0.7 SW 0.71 in 0600 AM 02/17 COCORAHS ...Kendall County... Oswego 4 SE 1.04 in 0700 AM 02/17 COCORAHS Plainfield 4 SW 1.03 in 0700 AM 02/17 COCORAHS Boulder Hill 1 NNE 0.91 in 0700 AM 02/17 COCORAHS ...La Salle County... La Salle 1.12 in 0700 AM 02/17 COCORAHS Peru 1 NNE 0.96 in 0700 AM 02/17 COCORAHS Mendota 1 SE 0.92 in 0700 AM 02/17 COOP Ottawa 0.85 in 0524 AM 02/17 COCORAHS Ottawa 1 N 0.82 in 0700 AM 02/17 COCORAHS Marseilles 2 WSW 0.74 in 0800 AM 02/17 COCORAHS Ottawa - Buffalo Rock SP 0.73 in 0730 AM 02/17 COOP ...Lake County... Lake Zurich 1.4 W 1.15 in 0600 AM 02/17 COCORAHS Highwood 1.08 in 0700 AM 02/17 COCORAHS Lake Bluff 2 W 0.98 in 0600 AM 02/17 COCORAHS Riverwoods 1 NE 0.97 in 0700 AM 02/17 COCORAHS Lake Forest 1 NNW 0.96 in 0800 AM 02/17 COCORAHS Bannockburn 0.93 in 0700 AM 02/17 COCORAHS Forest Lake 1 SSW 0.92 in 0700 AM 02/17 UCOOP Buffalo Grove 1 ESE 0.91 in 0700 AM 02/17 COCORAHS Libertyville 0.80 in 0800 AM 02/17 COCORAHS Mundelein 4 WSW 0.78 in 0700 AM 02/17 COOP Waukegan 2 N 0.68 in 0800 AM 02/17 COCORAHS ...Lee County... Paw Paw 2 S 1.00 in 0700 AM 02/17 COOP ...McHenry County... Algonquin 1 NNW 0.83 in 0545 AM 02/17 COCORAHS Trout Valley 0.79 in 0700 AM 02/17 COCORAHS 1 ESE Lakewood 0.72 in 0700 AM 02/17 COCORAHS Huntley 2 SW 0.69 in 0700 AM 02/17 COCORAHS ...Will County... Naperville 5 SSW 1.27 in 0700 AM 02/17 COCORAHS Plainfield 1.7 WNW 1.19 in 0700 AM 02/17 COCORAHS Crete 3 E 1.06 in 0700 AM 02/17 COCORAHS Joliet 3 WNW 0.98 in 0700 AM 02/17 COCORAHS Homer Glen 3 S 0.92 in 0700 AM 02/17 COCORAHS Crete 3 W 0.92 in 0800 AM 02/17 COCORAHS Joliet 2 N 0.90 in 0700 AM 02/17 UCOOP Homer Glen 1 NNE 0.88 in 0700 AM 02/17 COCORAHS Lockport 2 SE 0.85 in 0700 AM 02/17 COCORAHS New Lenox 1 SE 0.85 in 0800 AM 02/17 COCORAHS Mokena 2 WSW 0.82 in 0700 AM 02/17 COCORAHS 1 NW Rockdale 0.81 in 0700 AM 02/17 COCORAHS Mokena 1 W 0.78 in 0700 AM 02/17 COCORAHS Monee 5 SE 0.76 in 0800 AM 02/17 COCORAHS Peotone 0.73 in 0700 AM 02/17 COOP Beecher 3 SE 0.73 in 0700 AM 02/17 COCORAHS Frankfort 1 ESE 0.68 in 0700 AM 02/17 COCORAHS Manhattan 5 ENE 0.67 in 0800 AM 02/17 COOP ...Indiana... ...Jasper County... DeMotte 1.25 in 0800 AM 02/17 COCORAHS Collegeville 1.22 in 0700 AM 02/17 COCORAHS Rensselaer 2 SW 1.12 in 0730 AM 02/17 COOP Roselawn 3 ENE 1.09 in 0700 AM 02/17 COCORAHS Wheatfield 3 SSE 1.09 in 0700 AM 02/17 COCORAHS De Motte 6 S 1.00 in 0700 AM 02/17 COCORAHS Remington 0.83 in 0800 AM 02/17 COCORAHS Stoutsburg 1 SW 0.81 in 0700 AM 02/17 COCORAHS ...Lake County... Schererville 1 E 1.30 in 0800 AM 02/17 COCORAHS St. John 3 SSE 1.12 in 0700 AM 02/17 COCORAHS Hobart 1.1 S 1.10 in 0700 AM 02/17 COCORAHS Gary 5 ENE 1.04 in 0700 AM 02/17 COCORAHS Crown Point 2 NNE 1.04 in 0700 AM 02/17 COCORAHS Hammond 2 N 0.89 in 0700 AM 02/17 COCORAHS Griffith 0.85 in 0700 AM 02/17 COCORAHS Dyer 0.83 in 0700 AM 02/17 COCORAHS ...Newton County... Morocco 1.18 in 0600 AM 02/17 COOP Mount Ayr 2 NNE 1.06 in 0915 AM 02/17 COCORAHS ...Porter County... Valparaiso 1 N 1.26 in 0700 AM 02/17 COCORAHS Chesterton 2 E 1.20 in 0700 AM 02/17 COCORAHS Boone Grove 2 WNW 1.15 in 0700 AM 02/17 COCORAHS Chesterton 5 ESE 1.10 in 0700 AM 02/17 COCORAHS Porter 1.07 in 0700 AM 02/17 COCORAHS Boone Grove 4 NNE 1.01 in 0500 AM 02/17 COCORAHS Ogden Dunes 1.01 in 0535 AM 02/17 COCORAHS Portage 3 E 0.97 in 0700 AM 02/17 COCORAHS Lakes of the Four Seasons 0.97 in 0830 AM 02/17 COCORAHS |
Radar Loops
Here are two radar loops - the first for the rainfall Wednesday night into Thursday morning and the second for the snowfall Thursday evening.
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Ice Jam
On Wednesday, February 16, high temperatures across northern Illinois soared into the 50s. The warm temperatures in conjunction with rainfall on Thursday led to the rapid snowmelt of a snowpack along and south of the I-80 corridor leading to an increase in water levels on area rivers. In addition, the warming temperatures melted ice that was in place across areal rivers. After the rainfall Wednesday evening and temperature drop behind a cold front, an ice jam developed on the Kankakee River near Wilmington that locked in place on Thursday. Water levels near the I-55 bridge rose nearly 5 feet in a few hours and almost to Major Flood Stage, warranting the issuance of a Flash Flood Warning. Thursday evening, the ice jam broke causing the water to surge downstream. A second Flash Flood Warning was issued after the jam broke.
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| Hydrograph on the Kankakee River near Wilmington showing the abrupt rise and fall of water levels due to the ice jam. | A Flash Flood Warning was issued when the ice jam broke and water levels rose downstream. |
Messaging
Forecaster confidence in an impactful storm system began to rise the weekend prior to the storm, with a recognition for a dual-threat for both heavy rainfall and snowfall. With time, confidence continued to grow that an impactful storm system would move through our area, though pinpointing where the heaviest snow would fall was challenging due to wavering forecast model solutions. Here is a quick glimpse at select graphical messaging products sent by NWS Chicago leading up to the storm.
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| Four day weather graphic issued at 3:13 PM CST on Saturday, February 12, 2022, roughly 96 hours before rain began on Thursday, February. | Graphic issued at 5:39 AM CST Monday, February 14, 2022 highlighting the potential for heavy rainfall and an increased threat for flooding. |
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| Graphic issued at 6:38 AM CST Monday, February 14, 2022 demonstrating two forecast outcomes toward the middle of the week | Graphic issued at 3:30 PM CST Monday, February 14, 2022 showing increasing chances for impactful wintry weather across our area. |
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| Graphic issued at 6:29 AM CST on Tuesday, 2/15/2022 showing for the first time an area where confidence was highest in snowfall totals greater than 6". | Graphic issued at 5:00 PM CST on Tuesday, 2/15/2022 providing a "best estimate" precipitation type timeline across northeastern Illinois and northwestern Illinois, highlighting Thursday afternoon as the most likely time period for the highest snow rates with blowing snow. |
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| Graphic issued at 5:00 PM CST Tuesday, February 15, 2022 showing our first explicit snowfall forecast across our area. | Graphic issued on Wednesday, February 16, 2022 showing an estimated rainfall forecast with associated threats for flooding due to snow melt and rainfall. |
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| Graphic showing the snowfall forecast roughly 24 hours prior to the start of snow, issued at 3:00 PM CST 2/16/2022. | Interpolated and estimated local 24-hour snowfall ending at 10:00 AM CST 2/18/2022 (Courtesy of the Iowa Environmental Mesonet) |
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Media use of NWS Web News Stories is encouraged! Additional recaps can be found on the NWS Chicago Past Events Page. |
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