Atmospheric River Continues Areas of Heavy Rain and Snow for California This Weekend

An atmospheric river will continue to bring gusty winds, moderate to heavy rainfall, and potential flooding to southern California and the southern Great Basin through Sunday. Periods of heavy snow will continue as well above 7,000 feet over the Sierra Nevada mountains associated with this atmospheric river. Read More >

Overview

A powerful Arctic cold front surged into the Midwest on Thursday, December 22nd, bringing snow, strong winds, and bitterly cold temperatures in its wake. While snowfall accumulations generally only ranged between 1 and 5 inches, a rapidly deepening area of low pressure associated with the front caused strong winds that gusted in excess of 50 mph at times and produced substantial blowing and drifting snow that led to blizzard conditions at times. Additionally, the frigid temperatures with wind chills as low as -40F mitigated the effectiveness of road treatments and allowed for many roadways to remain snow and ice-covered into Friday, December 23rd even though most of the snow had ended Thursday evening.

The reduced visibilities and slippery roadways contributed to numerous automobile accidents on both days, which caused portions of I-65 and I-94 in northwest Indiana to be shut down for several hours. The cold and snowy conditions also disrupted train and air transportation before the holiday weekend, with several trains and flights being delayed or cancelled.

Summary of impacts from the December 22-23 Winter Storm

Photo of reduced visibility due to blowing snow at NWS Chicago during the afternoon of 12/23/2022.

Fast Facts
Temperatures
Winds
Snow Totals
Links

Fast Facts

A disruption of the polar vortex allowed for cold Arctic air to surge into the United States the week before Christmas. This helped spur the development of a "bomb cyclone" (a low pressure system whose atmospheric pressure falls at least 24 millibars in the span of 24 hours or less) that rapidly deepened over the Great Lakes and into Canada Thursday, December 22nd into Friday, December 23rd.

Snow developed along the cold front that was at the forefront of the Arctic air mass, with northern Illinois and northwest Indiana seeing a period of snowfall between the morning and evening of December 22nd.
- Snowfall totals were not significant. The official snow total from this storm for the city of Chicago at O'Hare Airport was 1.3", while Rockford officially observed 1.5" at Rockford Airport. The highest snow totals were seen in northwest Indiana, where snow totals ranged to just over 5 inches.
The most significant impacts with this winter storm were caused by strong winds, blowing snow, and extreme cold.
- â€‹Widespread 50+ mph wind gusts occurred across the area on Friday, December 23rd. The highest wind gust of 60 mph was observed in Deerfield, IL.
- Blizzard conditions, which are defined as blowing and/or falling snow with winds of at least 35 mph and visibility at or below a quarter mile for at least 3 hours, were observed at times across portions of northern Illinois and northwestern Indiana. The worst conditions were in open and rural areas without the protection of buildings and trees.
- Temperatures fell to as low as -12°F Thursday night into Friday morning, while wind chills fell to as low as a bone-chilling -42°F. Chicago's official low temperature for Friday, December 23rd was -8°F, while Chicago's official high temperature for this date ended up being -1°F. Rockford recorded a low temperature of -10°F and a high temperature of -2°F for the 23rd. While temperatures improved slightly into the weekend, sub-zero wind chills then continued into Saturday/Christmas Eve.
  - With high temperatures below 0°F, â€‹December 23rd was the coldest December day in Chicago since 1983 and in Rockford since 1989. These were the coldest high temperatures/wind chills observed in northern Illinois and northwest Indiana since late January 2019.
The "bomb cyclone," the Arctic cold front, and the attendant Arctic air mass behind the front caused impactful winter weather across most of the country. Essentially every county east of the Rocky Mountains was placed under some sort of winter weather-related advisory, watch, or warning at some point due to accumulating snow, blizzard or blizzard-like conditions, and/or very cold temperatures.

Map of NWS Warnings, Watches, and Advisories from the morning of Friday, December 23rd

Temperatures

One of the most notable impacts from the arctic blast was the dangerously cold temperatures with widespread minimum wind chills below -30°F and minimum air temperatures below -10°F. The coldest temperatures and wind chills were observed during the morning of December 23rd. Below are listings of minimum wind chills colder than -20°F and minimum air temperatures at or colder than -5°F collected form a variety of sources. December 23rd was the coldest December day in Rockford since 1989 and Chicago since 1983.

24-Hour Minimum Temperature (°F)

Location	Temperature
Mundelein 4 WSW	-12
West Chicago	-12
2 NNE Carol Stream	-11
1 SSW Harvard	-11
1 E Kankakee	-11
River Forest	-11
2 N Fox Lake Hills	-10
Barrington	-10
1 NNW Carol Stream	-10
Chicago - McKinley Park	-10
Deerfield	-10
1 SW Campton Hills	-10
I-94 E B At Mm 25.8 Tower St	-10
I-94 E B At Mm 29.9 Dms Sign	-10
I-94 E B At Mm 7.8 Dms	-10
I-94 W B At Mm 14.2 Dms Sign	-10
Park Forest	-10
Aurora	-9
1 WNW Aurora	-9
1 WSW Bloomingdale	-9
Bensenville	-9
1 SSE Lincoln Park - Chicago	-9
1 SE Logan Square	-9
2 S Glen Ellyn	-9
Dwight	-9
2 SW St. John	-9
Elgin	-9
1 NNE Glendale Heights	-9
1 E Gurnee	-9
1 NNW Lake Station	-9
Hazel Crest	-9
Libertyville	-9
1 SSW Lowell	-9
Midway 3 SW COOP	-9
Midway 3 SW	-9
4 S Hainesville	-9
Naperville	-9
Ottawa - Buffalo Rock SP	-9
1 WSW Crystal Lawns	-9
Rensselaer 2 SW	-9
NIU AGRONOMY SHABONNA 5 NNE	-9
1 NNW St. John	-9
Phoenix	-9
Sycamore	-9
2 NNE Tinley Park	-9
Highland Park 2 SSW (UP Rail	-9
Cary (UP Rail)	-9
Malta2	-9
1 ESE Valparaiso	-9
3 ESE Harvard	-8
3 NNE Campton Hills	-8
Batavia	-8
Griffith	-8
1 WSW Calumet City	-8
Lincoln Square - Chicago	-8
Albany Park - Chicago	-8
3 NNW Watseka	-8
Crystal Lake	-8
Wonder Lake	-8
Poplar Grove	-8
1 N Hammond	-8
Highland	-8
1 ESE Deerfield	-8
Herscher	-8
Harvey	-8
DeKalb	-8
St Charles	-8
Harvard 4 NW (McHenry DOT)	-8
I-94 E B At Mm 1.3 Dms	-8
2 WNW Mundelein	-8
Union	-8
Lisle	-8
Frankfort	-8
1 NNW Shorewood	-8
Halsws	-8
Elmhurst (UP Rail)	-8
Highland Park (UP Rail)	-8
Wilmette	-8
1 WSW Woodridge	-7
4 NW Remington	-7
6 NNE Bonfield	-7
3 WNW North Aurora	-7
1 NE Third Lake	-7
Beecher	-7
Bridgeport - Chicago	-7
Brighton Park - Chicago	-7
Northerly Island	-7
1 WNW Logan Square	-7
1 WSW North Park - Chicago	-7
Coal City 4 NNW	-7
Woodstock	-7
St. Charles	-7
Lake Zurich	-7
Wheaton	-7
McHenry	-7
1 W Des Plaines	-7
3 NNW Marengo	-7
Wadsworth	-7
Forrest	-7
4 WSW Leland	-7
Park Ridge	-7
Vernon Hills	-7
2 SE Volo	-7
Utica	-7
Sublette	-7
Harvard	-7
Lake Barrington	-7
Elmhurst - Salt Creek	-7
1 ESE Evanston	-7
Elburn	-7
Huntley	-7
Carpentersville	-7
Itasca	-7
Roscoe	-7
Kirkland	-7
Mount Morris	-7
Cary	-7
Saint Charles	-7
Gurnee	-7
Johnsburg	-7
South Beloit	-7
HOMER GLEN	-7
CROWN POINT	-7
1 SSE East Hazel Crest	-7
Stelle	-7
Herbert 5 ENE (McHenry DOT)	-7
Marengo 5 NW (McHenry DOT)	-7
Crystal Lake (McHenry DOT)	-7
McHenry (McHenry DOT)	-7
2.7 W Collegeville (INDOT)	-7
Fowler	-7
Valparaiso Airport	-7
Lemont	-7
York Center	-7
1 WSW Northbrook	-7
Harwood Heights	-7
Sandwich	-7
Elbrn2	-7
1 ESE Wheeling	-7
Waukegan Harbor	-7
Coolidge Middle School	-6
Lincoln Park - Chicago	-6
4 NNW Coal City	-6
Lake in the Hills	-6
Warrenville	-6
REDDICK	-6
Dixon Airport	-6
Grayslake	-6
Glenwood	-6
Roselawn	-6
Peotone	-6
4 NNE Piper City	-6
2 W Rolling Meadows	-6
2 W Lake Bluff	-6
Braidwood	-6
Woodridge	-6
2 WNW Warrenville	-6
6 S Lake Village	-6
3 E Sibley	-6
Milford	-6
Hoffman Estates	-6
Geneva	-6
Westmont	-6
Buffalo Grove	-6
Algonquin	-6
Roselle	-6
Orland Park	-6
Ashkum	-6
Channahon	-6
Lake Bluff	-6
Hawthorn Woods	-6
Rolling Meadows	-6
Streamwood	-6
PORTAGE	-6
TINLEY PARK	-6
Oswego	-6
I-94 At I-65	-6
1.7 E Remington (INDOT)	-6
Rockdale - Brandon Lock and	-6
Schaumburg Airport	-6
Sugar Grove - Aurora Arpt.	-6
Morris Airport	-6
Romeoville - Lewis Airport	-6
Rockford Airport	-6
Rochelle Airport	-6
Rensselaer Airport	-6
1.3 NW Calumet City	-6
South Holland	-6
Dune Acres RAWS	-6
Elburn 2 W (UP Rail)	-6
Waukegan 2 NE (UP Rail)	-6
Crete2	-6
Grtpk2	-6
Cline Avenue Bridge	-6
Northbrook	-5
Illinois R. - Dresden Lock-D	-5
Harrison-Dever Crib	-5
Calumet Harbor	-5
New Lenox	-5
Highwood	-5
Lake Catherine	-5
2 NW Arlington Heights	-5
Valparaiso	-5
1 WNW Norridge	-5
4 NW Ashton	-5
3 SSE Brook	-5
2 NNE Waukegan	-5
Morris	-5
Whiting	-5
Fairbury	-5
2 W Grand Ridge	-5
Dixon	-5
Hebron	-5
Hobart	-5
Genoa	-5

24-hour Minimum Wind Chill (°F)

Location	Wind Chill
Gurnee	-42
Crown Point	-42
2 WNW Mundelein	-42
Frankfort	-42
West Chicago	-42
Deerfield	-41
3 NNW Watseka	-41
2 SW St. John	-41
1 SSW Harvard	-41
Stelle	-41
Marengo 5 NW (McHenry DOT)	-41
Cary (UP Rail)	-41
1 WNW Logan Square	-40
1 SE Logan Square	-40
Chicago - McKinley Park	-40
3 NNW Marengo	-40
4 WSW Leland	-40
Batavia	-40
3 E Sibley	-40
Dyer	-40
1 N Hammond	-40
St Charles	-40
1.7 E Remington (INDOT)	-40
Sugar Grove - Aurora Arpt.	-40
1 E Kankakee	-40
1 SSW Lowell	-40
1 NNW St. John	-40
Sycamore	-40
2 NNE Carol Stream	-39
Roselawn	-39
Woodridge	-39
1 SW Campton Hills	-39
1 NNE Glendale Heights	-39
1 NNW Lake Station	-39
HOMER GLEN	-39
SOUTH BELOIT	-39
Highland	-39
DeKalb	-39
Herbert 5 ENE (McHenry DOT)	-39
2.7 W Collegeville (INDOT)	-39
Pontiac Airport	-39
Rochelle Airport	-39
1 NNW Shorewood	-39
Phoenix	-39
Claytonville 2 ENE (UP Rail)	-39
Elmhurst (UP Rail)	-39
Coolidge Middle School	-38
1 WNW Aurora	-38
1 WSW Bloomingdale	-38
Griffith	-38
Peotone	-38
6 S Lake Village	-38
Carpentersville	-38
Loves Park	-38
Roscoe	-38
Mount Morris	-38
Herscher	-38
Fowler	-38
Morris Airport	-38
West Chicago - DuPage Arpt.	-38
Romeoville - Lewis Airport	-38
Valparaiso Airport	-38
York Center	-38
4 S Hainesville	-38
1 WSW Crystal Lawns	-38
2 NNE Tinley Park	-38
Cline Avenue Bridge	-38
6 NNE Bonfield	-37
2 N Fox Lake Hills	-37
Beecher	-37
Northerly Island	-37
2 S Glen Ellyn	-37
4 NNE Piper City	-37
3 SSE Brook	-37
3 WNW Mazon	-37
Park Ridge	-37
Utica	-37
1 E Gurnee	-37
Harvard 4 NW (McHenry DOT)	-37
Gary Airport	-37
Lansing Airport	-37
Kankakee Airport	-37
Rockford Airport	-37
Rensselaer Airport	-37
Sandwich	-37
Highland Park (UP Rail)	-37
1 ESE Valparaiso	-37
4 NW Remington	-36
Bensenville	-36
Dixon Airport	-36
Bridgeport - Chicago	-36
Albany Park - Chicago	-36
1 NNW Carol Stream	-36
2 NNW Mazon	-36
St. Charles	-36
Morris	-36
Whiting	-36
Fairbury	-36
Crystal Lake	-36
Harvey	-36
Crystal Lake (McHenry DOT)	-36
Chicago Midway	-36
Peru Airport	-36
Lemont	-36
1 WSW Northbrook	-36
1 ESE South Chicago	-36
1 WSW Calumet City	-35
Orland Park	-35
Forrest	-35
2 SE Volo	-35
Hebron	-35
Algonquin	-35
Channahon	-35
Johnsburg	-35
Oswego	-35
Hazel Crest	-35
McHenry (McHenry DOT)	-35
Wheeling - Chicago Exec. Arp	-35
Libertyville	-35
Lisle	-35
Wilmette	-35
Grayslake	-34
2 W Lake Bluff	-34
2 NNE Waukegan	-34
Westmont	-34
Ashkum	-34
Itasca	-34
Cary	-34
Geneva	-34
Joliet	-34
Plainfield	-34
Schaumburg Airport	-34
Chicago O''Hare	-34
1 SSE Lincoln Park - Chicago	-33
1 W Des Plaines	-33
Woodstock	-33
Elburn	-33
Naperville	-33
Wonder Lake	-33
Kouts	-33
1 ESE Deerfield	-33
Harwood Heights	-33
South Holland	-33
Halsws	-33
2 W Rolling Meadows	-32
Dixon	-32
Hoffman Estates	-32
Sublette	-32
Rosemont	-32
Kirkland	-32
Oak Park	-32
Lake in the Hills	-32
Watseka	-32
1 SSE East Hazel Crest	-32
Waukegan Airport	-32
Midewin RAWS	-32
Elk Grove Village	-31
Calumet Harbor	-31
Wadsworth	-31
Milford	-31
1 ESE Evanston	-31
Lake Forest	-31
2 SW North Aurora	-31
Streamwood	-31
Joliet Airport	-31
River Forest	-31
1 ESE Wheeling	-31
Lincoln Park - Chicago	-30
3 ESE Harvard	-30
3 WNW North Aurora	-30
4 NNW Coal City	-30
Wheaton	-30
Valparaiso	-30
Braidwood	-30
North Aurora	-30
Bonfield	-30
Elgin	-30
Franklin Park	-30
REDDICK	-29
Lincoln Square - Chicago	-29
1 WSW North Park - Chicago	-29
Highwood	-29
1 WNW Norridge	-29
Lake Barrington	-29
1 N Norridge	-29
Dwight	-29
Skokie	-29
Munster	-29
Hawthorn Woods	-29
Rolling Meadows	-29
CHICAGO	-29
1 W Hawthorn Woods	-28
Northbrook	-28
Lake Zurich	-28
New Lenox	-28
La Grange	-28
Grant Park	-28
2 NW Plainfield	-28
Huntley	-27
Glenview	-27
Warrenville	-27
Aurora	-27
Evanston	-27
PORTAGE	-27
TINLEY PARK	-27
Barrington	-26
Rochelle 4 WSW (UP Rail)	-26
Glenwood	-25
Hobart	-25
Streator	-25
Richmond	-25
Chesterton	-25
ZION	-25
Dune Acres RAWS	-25
1 NE Third Lake	-24
Vernon Hills	-24
Hickory Hills	-23
Glen Ellyn	-23
Buffalo Grove	-23
McHenry	-22
Genoa	-22
Union Hill	-22
3 NNE Campton Hills	-21

Winds

In addition to the arctic cold and snow, westerly winds became strong with peak gusts measured between 45 and 55 mph in most areas. A few locations even saw wind gusts near 60 mph! The cold temperatures and strong winds led to areas of blowing snow and zero visibility, with the worst conditions observed in open and rural areas, as well as across northwestern Indiana.

...HIGHEST WIND REPORTS...

Location                     Speed     Time/Date
Deerfield                    60 MPH    0348 PM 12/23
Gary Airport                 58 MPH    0245 PM 12/23
Montrose Beach Light         56 MPH    0544 PM 12/23
1.7 E Remington (INDOT)      54 MPH    0220 PM 12/23
Valparaiso Airport           54 MPH    0305 PM 12/23
Harrison-Dever Crib          53 MPH    0400 PM 12/23
Crown Point                  53 MPH    0830 AM 12/23
Chicago Midway               53 MPH    0225 PM 12/23
Sugar Grove - Aurora Arpt.   52 MPH    0208 PM 12/23
Rockford Airport             52 MPH    0105 PM 12/23
Cline Avenue Bridge          52 MPH    0438 PM 12/23
Chicago O''Hare              51 MPH    0154 PM 12/23
Peru Airport                 51 MPH    0515 PM 12/23
2 WNW Michigan City          51 MPH    0400 PM 12/23
Kouts                        50 MPH    0415 PM 12/23
Elwod1                       50 MPH    0325 PM 12/23
2.7 W Collegeville (INDOT)   49 MPH    0540 PM 12/23
West Chicago - DuPage Arpt.  49 MPH    0244 PM 12/23
Gurnee                       48 MPH    0816 AM 12/23
Fowler                       48 MPH    0320 PM 12/23
Pontiac Airport              48 MPH    0350 PM 12/23
Rensselaer Airport           48 MPH    0355 PM 12/23
Papineau 2 N (UP Rail)       48 MPH    0217 PM 12/23
Elmhurst (UP Rail)           48 MPH    0310 PM 12/23
Morris Airport               47 MPH    0220 PM 12/23
Hebron                       46 MPH    0715 AM 12/23
Geneva                       46 MPH    0430 PM 12/23
HOMER GLEN                   46 MPH    1148 AM 12/23
Marengo 5 NW (McHenry DOT)   46 MPH    0320 PM 12/23
Harvard 4 NW (McHenry DOT)   46 MPH    1220 PM 12/23
Lansing Airport              46 MPH    1155 AM 12/23
Kankakee Airport             46 MPH    0435 PM 12/23
Sycamore                     45 MPH    0256 PM 12/23
Hebron                       45 MPH    0500 PM 12/23
Rosemont                     45 MPH    0200 AM 12/23
Crystal Lake                 45 MPH    1009 AM 12/23
Loves Park                   45 MPH    0237 PM 12/23
Mount Morris                 45 MPH    1201 PM 12/23
Herbert 5 ENE (McHenry DOT)  45 MPH    0120 PM 12/23
Romeoville - Lewis Airport   45 MPH    0215 PM 12/23
Wheeling - Chicago Exec. Arp 45 MPH    0640 PM 12/23
Rochelle Airport             45 MPH    0535 PM 12/23
Claytonville 2 ENE (UP Rail) 45 MPH    0200 PM 12/23
Carpentersville              44 MPH    0529 PM 12/23
Johnsburg                    44 MPH    0156 PM 12/23
Waukegan Airport             44 MPH    1123 AM 12/23
Roselawn                     43 MPH    0629 PM 12/23
Peotone                      43 MPH    1150 AM 12/23
2 NNW Mazon                  42 MPH    0330 PM 12/23
Hoffman Estates              42 MPH    0135 PM 12/23
Warrenville                  42 MPH    0638 PM 12/23
Midewin RAWS                 42 MPH    0405 PM 12/23
Dixon Airport                41 MPH    0239 PM 12/23
3 WNW Mazon                  41 MPH    0505 AM 12/23
2 SW North Aurora            41 MPH    0246 PM 12/23
Utica                        41 MPH    0615 PM 12/23
SOUTH BELOIT                 41 MPH    1230 PM 12/23
CROWN POINT                  41 MPH    0318 PM 12/23
Stelle                       41 MPH    0310 PM 12/23
Crystal Lake (McHenry DOT)   41 MPH    0500 PM 12/23
Schaumburg Airport           41 MPH    0215 PM 12/23
Mount Prospect (UP Rail)     41 MPH    0320 PM 12/23
Harvard 6 NW (UP Rail)       41 MPH    0307 PM 12/23
Coolidge Middle School       40 MPH    0600 PM 12/23
Coal City 4 NNW              40 MPH    0700 AM 12/24
Frankfort                    40 MPH    0236 PM 12/23
4 WSW Leland                 40 MPH    1155 AM 12/23
6 S Lake Village             40 MPH    0335 PM 12/23
Lake Forest                  40 MPH    1230 PM 12/23
Orland Park                  40 MPH    1100 AM 12/23
Naperville                   40 MPH    0500 PM 12/23
McHenry (McHenry DOT)        40 MPH    0150 PM 12/23
Joliet Airport               40 MPH    0215 PM 12/23
3 NNW Watseka                39 MPH    0700 AM 12/23

Snow Totals

Snowfall summary graphic

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO IL
1054 AM CST FRI DEC 23 2022

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

0700 AM     SNOW             PORTER                  41.62N 87.08W
12/23/2022  M5.4 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-69 PORTER.

0630 AM     SNOW             2 E CHESTERTON          41.61N 87.03W
12/23/2022  M4.0 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-110 CHESTERTON 2 E.

0700 AM     SNOW             3 NNW LAKE STATION      41.62N 87.25W
12/23/2022  M4.0 INCH        LAKE               IN   COCORAHS

            COCORAHS STATION IN-LK-63 GARY 5 ENE.

0700 AM     SNOW             2 SSE PLAINFIELD        41.58N 88.19W
12/23/2022  M3.4 INCH        WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-51 PLAINFIELD 2 SSE.

0700 AM     SNOW             2 NNE HOMER GLEN        41.63N 87.93W
12/23/2022  M3.2 INCH        WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-16 HOMER GLEN 2 NNE.

0700 AM     SNOW             2 WSW MOKENA            41.52N 87.92W
12/23/2022  M3.2 INCH        WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-97 MOKENA 2 WSW.

0520 AM     SNOW             OGDEN DUNES             41.62N 87.20W
12/23/2022  M3.0 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-157 OGDEN DUNES.

0700 AM     SNOW             WEST RIDGE - CHICAGO    42.00N 87.70W
12/23/2022  M3.0 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-94 CHICAGO - WEST
            RIDGE.

0700 AM     SNOW             1 N VALPARAISO          41.49N 87.06W
12/23/2022  M2.8 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-98 VALPARAISO 1 N.

0700 AM     SNOW             HOMEWOOD                41.56N 87.66W
12/23/2022  M2.6 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-64 HOMEWOOD.

0800 AM     SNOW             1 SSW BURBANK           41.73N 87.78W
12/23/2022  M2.6 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-211 OAK LAWN 2 WNW.

0600 AM     SNOW             2 WSW KANKAKEE          41.11N 87.89W
12/23/2022  M2.5 INCH        KANKAKEE           IL   COCORAHS

            COCORAHS STATION IL-KK-45 KANKAKEE 1.4 WSW.

0600 AM     SNOW             1 SW LAKE VILLA         42.40N 88.09W
12/23/2022  M2.5 INCH        LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-9 LAKE VILLA 1 SW.

0600 AM     SNOW             NWS CHICAGO-ROMEOVILLE  41.60N 88.09W
12/23/2022  M2.5 INCH        WILL               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION LOTI2 ROMEOVILLE -
            NWS CHICAGO.

0700 AM     SNOW             PEOTONE                 41.33N 87.79W
12/23/2022  M2.5 INCH        WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-46 PEOTONE.

0700 AM     SNOW             CHICAGO RIDGE           41.70N 87.78W
12/23/2022  M2.5 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-152 CHICAGO RIDGE.

0731 AM     SNOW             2 SE HOBART             41.51N 87.23W
12/23/2022  M2.5 INCH        LAKE               IN   COCORAHS

            COCORAHS STATION IN-LK-119 HOBART 2.4 SE.

0800 AM     SNOW             1 E EVANSTON            42.04N 87.68W
12/23/2022  M2.5 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-336 EVANSTON 1 E.

0700 AM     SNOW             1 SSW GENOA             42.08N 88.71W
12/23/2022  M2.4 INCH        DE KALB            IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION GEOI2 GENOA.

0700 AM     SNOW             1 NNE PALATINE          42.13N 88.03W
12/23/2022  M2.4 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-294 PALATINE 1 NNE.

0700 AM     SNOW             1 NNE OAK PARK          41.91N 87.78W
12/23/2022  M2.4 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-74 OAK PARK 1 NNE.

0700 AM     SNOW             5 NW WOODSTOCK          42.36N 88.53W
12/23/2022  M2.4 INCH        MCHENRY            IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION WODI2 WOODSTOCK 5 NW.

0700 AM     SNOW             3 SSE ST. JOHN          41.42N 87.44W
12/23/2022  M2.4 INCH        LAKE               IN   COCORAHS

            COCORAHS STATION IN-LK-99 ST. JOHN 3 SSE.

0830 AM     SNOW             1 SSE WADSWORTH         42.42N 87.92W
12/23/2022  M2.4 INCH        LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-120 WADSWORTH 1.4 S.

0600 AM     SNOW             2 NNW CEDAR LAKE        41.39N 87.46W
12/23/2022  M2.3 INCH        LAKE               IN   COCORAHS

            COCORAHS STATION IN-LK-109 CEDAR LAKE 2 NNW.

0625 AM     SNOW             1 WSW WHEATON           41.86N 88.12W
12/23/2022  M2.3 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-184 WHEATON.

0700 AM     SNOW             1 SSW LA GRANGE PARK    41.82N 87.88W
12/23/2022  M2.3 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-98 LA GRANGE PARK 1
            SSW.

0700 AM     SNOW             4 SW PLAINFIELD         41.57N 88.27W
12/23/2022  M2.3 INCH        KENDALL            IL   COCORAHS

            COCORAHS STATION IL-KD-34 PLAINFIELD 4 SW.

0900 AM     SNOW             1 NNW BATAVIA           41.87N 88.32W
12/23/2022  M2.3 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-22 GENEVA 1 SSW.

0700 AM     SNOW             1 NE RIVERWOODS         42.17N 87.89W
12/23/2022  M2.1 INCH        LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-39 RIVERWOODS 1 NE.

0700 AM     SNOW             1 WSW CREST HILL        41.55N 88.13W
12/23/2022  M2.1 INCH        WILL               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION JKJI2 JOLIET 2 N.

0700 AM     SNOW             1 NW BATAVIA            41.86N 88.33W
12/23/2022  M2.1 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-23 BATAVIA 1 NW.

0730 AM     SNOW             1 W MOKENA              41.53N 87.90W
12/23/2022  M2.1 INCH        WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-42 MOKENA 1 W.

0600 AM     SNOW             1 WSW NAPERVILLE        41.77N 88.16W
12/23/2022  M2.0 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-156 NAPERVILLE.

0600 AM     SNOW             1 N MOROCCO             40.97N 87.45W
12/23/2022  M2.0 INCH        NEWTON             IN   CO-OP OBSERVER

            CO-OP OBSERVER STATION MORI3 MOROCCO.

0644 AM     SNOW             2 SW WINFIELD           41.85N 88.18W
12/23/2022  M2.0 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-164 WEST CHICAGO 4
            SE.

0700 AM     SNOW             3 W ELGIN               42.04N 88.34W
12/23/2022  M2.0 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-95 ELGIN 3 W.

0700 AM     SNOW             TROUT VALLEY            42.20N 88.25W
12/23/2022  M2.0 INCH        MCHENRY            IL   COCORAHS

            COCORAHS STATION IL-MCH-95 TROUT VALLEY.

0700 AM     SNOW             2 WNW LOVES PARK        42.32N 89.09W
12/23/2022  M2.0 INCH        WINNEBAGO          IL   COCORAHS

            COCORAHS STATION IL-WN-48 4 NNW ROCKFORD.

0700 AM     SNOW             3 NNW HAWTHORN WOODS    42.26N 88.08W
12/23/2022  M2.0 INCH        LAKE               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION MUNI2 MUNDELEIN 4
            WSW.

0700 AM     SNOW             2 N AURORA              41.78N 88.31W
12/23/2022  M2.0 INCH        KANE               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION ARRI2 AURORA.

0700 AM     SNOW             1 W GLEN ELLYN          41.88N 88.09W
12/23/2022  M2.0 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-132 GLEN ELLYN 1 W.

0700 AM     SNOW             4 ESE AURORA            41.73N 88.24W
12/23/2022  M2.0 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-16 AURORA 4 ESE.

0700 AM     SNOW             1 NE PAW PAW            41.70N 88.97W
12/23/2022  M2.0 INCH        LEE                IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION PAWI2 PAW PAW 2 S.

0800 AM     SNOW             1 NNW MORRIS            41.37N 88.43W
12/23/2022  M2.0 INCH        GRUNDY             IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION MOSI2 MORRIS 1 NW.

0800 AM     SNOW             1 WNW PARK FOREST       41.49N 87.70W
12/23/2022  M2.0 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-320 PARK FOREST 1
            WNW.

0800 AM     SNOW             4 ESE AURORA            41.74N 88.23W
12/23/2022  M2.0 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-KN-115 AURORA 4 ESE.

0800 AM     SNOW             1 ENE ST. CHARLES       41.92N 88.30W
12/23/2022  M2.0 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-64 ST. CHARLES 1 ENE.

0800 AM     SNOW             2 WSW GOODENOW          41.38N 87.68W
12/23/2022  M2.0 INCH        WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-149 MONEE 5 SE.

0845 AM     SNOW             1 NNE PERU              41.35N 89.12W
12/23/2022  M2.0 INCH        LA SALLE           IL   COCORAHS

            COCORAHS STATION IL-LS-60 PERU 1 NNE.

0600 AM     SNOW             1 WSW BURBANK           41.74N 87.78W
12/23/2022  M1.9 INCH        COOK               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION MFWI2 MIDWAY 3 SW.

0700 AM     SNOW             2 N BUFFALO GROVE       42.19N 87.96W
12/23/2022  M1.9 INCH        LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-16 BUFFALO GROVE 2 N.

0700 AM     SNOW             2 WNW GENEVA            41.89N 88.33W
12/23/2022  M1.9 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-121 GENEVA 2 WNW.

0700 AM     SNOW             MARENGO                 42.26N 88.60W
12/23/2022  M1.8 INCH        MCHENRY            IL   COCORAHS

            COCORAHS STATION IL-MCH-87 MARENGO.

0700 AM     SNOW             3 N CARBON HILL         41.34N 88.30W
12/23/2022  M1.8 INCH        GRUNDY             IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION CTYI2 COAL CITY 4
            NNW.

0700 AM     SNOW             1 ESE VILLA PARK        41.88N 87.96W
12/23/2022  M1.8 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-178 VILLA PARK.

0700 AM     SNOW             3 N CARBON HILL         41.34N 88.30W
12/23/2022  M1.8 INCH        GRUNDY             IL   COCORAHS

            COCORAHS STATION IL-GY-1 CARBON HILL 3 N.

0710 AM     SNOW             1 N MEDINAH             42.00N 88.05W
12/23/2022  M1.8 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-75 ELK GROVE VILLAGE
            2 WSW.

0700 AM     SNOW             2 W BOURBONNAIS         41.17N 87.92W
12/23/2022  M1.7 INCH        KANKAKEE           IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION BOUI2 BOURBONNAIS.

0700 AM     SNOW             1 SSW INDIAN HEAD PARK  41.76N 87.90W
12/23/2022  M1.7 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-358 INDIAN HEAD PARK.

0700 AM     SNOW             2 WSW PALOS PARK        41.65N 87.86W
12/23/2022  M1.7 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-50 PALOS PARK 2 WSW.

0700 AM     SNOW             1 SW DEKALB             41.92N 88.76W
12/23/2022  M1.7 INCH        DE KALB            IL   COCORAHS

            COCORAHS STATION IL-DK-28 DEKALB.

0700 AM     SNOW             4 ESE AURORA            41.73N 88.24W
12/23/2022  M1.7 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-101 AURORA 4 ESE.

0700 AM     SNOW             3 NNW CARBON HILL       41.33N 88.31W
12/23/2022  M1.7 INCH        GRUNDY             IL   COCORAHS

            COCORAHS STATION IL-GY-16 CARBON HILL 3 NNW.

0730 AM     SNOW             1 NW COLLEGEVILLE       40.92N 87.18W
12/23/2022  M1.7 INCH        JASPER             IN   CO-OP OBSERVER

            CO-OP OBSERVER STATION RZZI3 RENSSELAER 2
            SW.

0800 AM     SNOW             1 E BANNOCKBURN         42.19N 87.85W
12/23/2022  M1.7 INCH        LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-118 HIGHLAND PARK 2.1
            WNW.

0700 AM     SNOW             BANNOCKBURN             42.19N 87.86W
12/23/2022  M1.6 INCH        LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-15 BANNOCKBURN.

0700 AM     SNOW             1 SW TIMBERLANE         42.32N 88.88W
12/23/2022  M1.6 INCH        BOONE              IL   COCORAHS

            COCORAHS STATION IL-BN-19 TIMBERLANE 1 SW.

0700 AM     SNOW             2 W MORRIS              41.35N 88.45W
12/23/2022  M1.6 INCH        GRUNDY             IL   COCORAHS

            COCORAHS STATION IL-GY-28 MORRIS 2 W.

0500 AM     SNOW             1 N PARK FOREST         41.50N 87.68W
12/23/2022  M1.5 INCH        COOK               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION PKFI2 PARK FOREST.

0600 AM     SNOW             CORTLAND                41.92N 88.69W
12/23/2022  M1.5 INCH        DE KALB            IL   COCORAHS

            COCORAHS STATION IL-DK-5 CORTLAND.

0600 AM     SNOW             COLLEGEVILLE            40.91N 87.16W
12/23/2022  M1.5 INCH        JASPER             IN   COCORAHS

            COCORAHS STATION IN-JS-7 COLLEGEVILLE.

0630 AM     SNOW             3 N NEW LENOX           41.56N 87.96W
12/23/2022  M1.5 INCH        WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-180 MOKENA 4 WNW.

0700 AM     SNOW             5 SSW NAPERVILLE        41.71N 88.17W
12/23/2022  M1.5 INCH        WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-92 NAPERVILLE 5 SSW.

0700 AM     SNOW             1 SSW FOREST LAKE       42.19N 88.07W
12/23/2022  M1.5 INCH        LAKE               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION LKZI2 FOREST LAKE 1
            SSW.

0700 AM     SNOW             1 E PALATINE            42.11N 88.02W
12/23/2022  M1.5 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-121 PALATINE 1 E.

0700 AM     SNOW             1 ESE PROSPECT HEIGHTS  42.10N 87.90W
12/23/2022  M1.5 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-42 MOUNT PROSPECT 3
            NE.

0700 AM     SNOW             4 ENE MILFORD           40.66N 87.64W
12/23/2022  M1.5 INCH        IROQUOIS           IL   COCORAHS

            COCORAHS STATION IL-IR-25 MILFORD 3.5 ENE.

0700 AM     SNOW             4 NNE BOONE GROVE       41.41N 87.10W
12/23/2022  M1.5 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-117 BOONE GROVE 4
            NNE.

0730 AM     SNOW             1 WNW BRIDGEVIEW        41.76N 87.82W
12/23/2022  M1.5 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-12 BRIDGEVIEW 1 WNW.

0730 AM     SNOW             2 SE DARIEN             41.73N 87.95W
12/23/2022  M1.5 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-79 DARIEN 2 SE.

0700 AM     SNOW             2 W AURORA              41.76N 88.35W
12/23/2022  M1.4 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-123 AURORA 2 W.

0700 AM     SNOW             CLARENDON HILLS         41.80N 87.95W
12/23/2022  M1.4 INCH        DUPAGE             IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION WJWI2 CLARENDON
            HILLS.

0745 AM     SNOW             OAK LAWN                41.71N 87.75W
12/23/2022  M1.4 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-149 OAK LAWN.

0800 AM     SNOW             2 SSE BARRINGTON HILLS  42.12N 88.16W
12/23/2022  M1.4 INCH        COOK               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION BARI2 BARRINGTON.

0800 AM     SNOW             FRANKLIN PARK           41.93N 87.87W
12/23/2022  M1.4 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-345 FRANKLIN PARK 0.5
            SSE.

0530 AM     SNOW             1 NNW ALGONQUIN         42.17N 88.30W
12/23/2022  M1.3 INCH        MCHENRY            IL   COCORAHS

            COCORAHS STATION IL-MCH-43 ALGONQUIN 1 NNW.

0700 AM     SNOW             4 NNE HARVARD           42.48N 88.58W
12/23/2022  M1.3 INCH        MCHENRY            IL   COCORAHS

            COCORAHS STATION IL-MCH-103 HARVARD 4.4 NNE.

0700 AM     SNOW             1 NW PALATINE           42.13N 88.06W
12/23/2022  M1.3 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-346 PALATINE 1.2 NW.

0700 AM     SNOW             1 SSW GENEVA            41.87N 88.31W
12/23/2022  M1.3 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-127 GENEVA.

0731 AM     SNOW             1 NW OTTAWA             41.36N 88.86W
12/23/2022  M1.3 INCH        LA SALLE           IL   COCORAHS

            COCORAHS STATION IL-LS-1 OTTAWA.

0600 AM     SNOW             BATAVIA                 41.85N 88.31W
12/23/2022  M1.2 INCH        KANE               IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION BATI2 BATAVIA.

0600 AM     SNOW             1 NNW DEMOTTE           41.21N 87.21W
12/23/2022  M1.2 INCH        JASPER             IN   COCORAHS

            COCORAHS STATION IN-JS-37 DEMOTTE.

0700 AM     SNOW             2 E SCHAUMBURG          42.03N 88.04W
12/23/2022  M1.2 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-131 SCHAUMBURG 2 E.

0730 AM     SNOW             MOUNT PROSPECT          42.07N 87.94W
12/23/2022  M1.2 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-367 MOUNT PROSPECT
            0.2 NNE.

0800 AM     SNOW             1 SE NEW LENOX          41.50N 87.95W
12/23/2022  M1.2 INCH        WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-147 NEW LENOX 1 SE.

0830 AM     SNOW             1 SSE LIBERTYVILLE      42.27N 87.95W
12/23/2022  M1.2 INCH        LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-127 LIBERTYVILLE 1.6
            SE.

0700 AM     SNOW             1 ESE SPRING GROVE      42.44N 88.22W
12/23/2022  M1.1 INCH        MCHENRY            IL   COCORAHS

            COCORAHS STATION IL-MCH-108 SPRING GROVE 1.2
            ESE.

0700 AM     SNOW             1 NNE HOMER GLEN        41.61N 87.93W
12/23/2022  M1.1 INCH        WILL               IL   COCORAHS

            COCORAHS STATION IL-WL-131 HOMER GLEN 1 NNE.

0600 AM     SNOW             4 SW VALPARAISO         41.43N 87.11W
12/23/2022  M1.0 INCH        PORTER             IN   COCORAHS

            COCORAHS STATION IN-PT-12 VALPARAISO 4 SW.

0700 AM     SNOW             LONG LAKE               42.37N 88.12W
12/23/2022  M1.0 INCH        LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-100 LONG LAKE.

0700 AM     SNOW             FOX LAKE HILLS          42.41N 88.12W
12/23/2022  M1.0 INCH        LAKE               IL   COCORAHS

            COCORAHS STATION IL-LK-81 FOX LAKE HILLS.

0700 AM     SNOW             CHATSWORTH              40.75N 88.29W
12/23/2022  M1.0 INCH        LIVINGSTON         IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION CHTI2 CHATSWORTH.

0700 AM     SNOW             1 ESE ELK GROVE VILLAGE 42.00N 87.98W
12/23/2022  M1.0 INCH        COOK               IL   COCORAHS

            COCORAHS STATION IL-CK-63 ELK GROVE VILLAGE
            1 ESE.

0700 AM     SNOW             2 S WOODRIDGE           41.73N 88.04W
12/23/2022  M1.0 INCH        DUPAGE             IL   COCORAHS

            COCORAHS STATION IL-DP-102 BOLINGBROOK 3 NE.

0700 AM     SNOW             4 NE FAIR OAKS          41.11N 87.20W
12/23/2022  M1.0 INCH        JASPER             IN   COCORAHS

            COCORAHS STATION IN-JS-31 DE MOTTE 6 S.

0700 AM     SNOW             CHATSWORTH              40.75N 88.29W
12/23/2022  M1.0 INCH        LIVINGSTON         IL   COCORAHS

            COCORAHS STATION IL-LV-7 CHATSWORTH 0.4 ESE.

0733 AM     SNOW             1 ENE NORTH AURORA      41.82N 88.31W
12/23/2022  M1.0 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-33 NORTH AURORA 1
            ENE.

0740 AM     SNOW             2 W NAPLATE             41.33N 88.91W
12/23/2022  M1.0 INCH        LA SALLE           IL   CO-OP OBSERVER

            CO-OP OBSERVER STATION OTTI2 OTTAWA -
            BUFFALO ROCK SP.

0800 AM     SNOW             GENEVA                  41.88N 88.30W
12/23/2022  M1.0 INCH        KANE               IL   COCORAHS

            COCORAHS STATION IL-KN-133 GENEVA.

0900 AM     SNOW             REMINGTON               40.77N 87.15W
12/23/2022  M1.0 INCH        JASPER             IN   COCORAHS

            COCORAHS STATION IN-JS-47 REMINGTON.

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Atmospheric River Continues Areas of Heavy Rain and Snow for California This Weekend

December 22-23, 2022: Powerful Arctic Front Brings Snow, Strong Winds, and Bitterly Cold Temperatures to the Region