313
WWUS43 KLOT 310126
WSWLOT
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
726 PM CST FRI JAN 30 2026
ILZ103-311130-
/O.CAN.KLOT.WW.Y.0006.000000T0000Z-260131T0200Z/
/O.CON.KLOT.WW.Y.0007.260131T1200Z-260131T2200Z/
NORTHERN COOK-
INCLUDING THE CITIES OF DES PLAINES, EVANSTON, PALATINE,
SCHAUMBURG, AND NORTHBROOK
726 PM CST FRI JAN 30 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM TO 4 PM CST
SATURDAY...
* WHAT...LAKE EFFECT SNOW EXPECTED SATURDAY MORNING. TOTAL SNOW
ACCUMULATIONS UP TO 5 INCHES IN LOCALIZED AREAS NEAR THE LAKE.
* WHERE...NORTHERN COOK COUNTY.
* WHEN...FROM 6 AM TO 4 PM CST SATURDAY.
* IMPACTS...ROADS, AND ESPECIALLY BRIDGES AND OVERPASSES, WILL
LIKELY BECOME SLICK AND HAZARDOUS.
* ADDITIONAL DETAILS...THE BAND OF SNOW IS EXPECTED TO SHIFT BACK
WESTWARD INTO PARTS OF NORTHEASTERN ILLINOIS SATURDAY MORNING.
THIS WILL LIKELY RESULT IN ADDITIONAL LOCALIZED ACCUMULATIONS AND
TRAVEL IMPACTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE LATEST FORECASTS FOR UPDATES ON THIS SITUATION.
DURING LAKE EFFECT SNOW, THE WEATHER CAN VARY FROM BANDS OF LOCALLY
HEAVY SNOW TO DRY WEATHER JUST A FEW MILES AWAY. VISIBILITIES CAN
ALSO VARY GREATLY. BE PREPARED FOR RAPID CHANGES IN WEATHER,
VISIBILITY, AND ROAD CONDITIONS.
ILZ006-013-310230-
/O.CAN.KLOT.WW.Y.0006.000000T0000Z-260131T0200Z/
LAKE IL-DUPAGE-
INCLUDING THE CITIES OF MUNDELEIN, BUFFALO GROVE, WHEATON,
LOMBARD, WAUKEGAN, NAPERVILLE, CAROL STREAM, DOWNERS GROVE, AND
GURNEE
726 PM CST FRI JAN 30 2026
..WINTER WEATHER ADVISORY IS CANCELLED
THE THREAT OF LAKE EFFECT SNOW HAS ENDED.
ILZ104-105-311130-
/O.CON.KLOT.WS.W.0003.000000T0000Z-260131T0600Z/
/O.CON.KLOT.WW.Y.0007.260131T1200Z-260131T2200Z/
CENTRAL COOK-SOUTHERN COOK-
INCLUDING THE CITIES OF LA GRANGE, CICERO, CALUMET CITY, OAK
FOREST, OAK LAWN, PARK FOREST, ORLAND PARK, OAK PARK, LEMONT, AND
CHICAGO
726 PM CST FRI JAN 30 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST
TONIGHT...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM TO 4 PM CST
SATURDAY...
* WHAT...FOR THE WINTER STORM WARNING THROUGH THIS EVENING, HEAVY
LAKE EFFECT SNOW. ADDITIONAL ACCUMULATIONS UP TO 1 TO 2 INCHES,
PARTICULARLY NEAR THE LAKE IN SOUTHERN COOK COUNTY. FOR THE WINTER
WEATHER ADVISORY ON SATURDAY, ANOTHER ROUND OF LAKE EFFECT SNOW,
WITH ADDITIONAL LOCALIZED ACCUMULATIONS IN EXCESS OF 3 INCHES
POSSIBLE.
* WHERE...CENTRAL COOK AND SOUTHERN COOK COUNTIES.
* WHEN...FOR THE WINTER STORM WARNING, UNTIL MIDNIGHT CST TONIGHT.
FOR THE WINTER WEATHER ADVISORY, FROM 6 AM TO 4 PM CST SATURDAY.
* IMPACTS...TRAVEL WILL REMAIN HAZARDOUS AT TIMES INTO THIS EVENING,
PARTICULARLY NEAR THE LAKE. ADDITIONAL LOCALIZED ADVERSE IMPACTS
TO TRAVEL ARE LIKELY AT TIMES ON SATURDAY.
* ADDITIONAL DETAILS...ACCUMULATING LAKE EFFECT SNOW WILL CONTINUE
INTO THIS EVENING, AND WILL FALL LOCALLY UP TO 1 INCH PER HOUR
RATES AT TIMES, MAKING FOR HAZARDOUS TRAVEL CONDITIONS. THIS WILL
PARTICULARLY BE THE CASE FOR AREAS IN CLOSE PROXIMITY TO THE LAKE.
THIS INTENSE BAND OF LAKE EFFECT SNOW IS EXPECTED TO SHIFT
EASTWARD INTO NORTHWESTERN INDIANA LATE THIS EVENING AND
OVERNIGHT, THUS RESULTING IN A SEVERAL HOUR BREAK IN ACCUMULATING
SNOW ACROSS COOK COUNTY OVERNIGHT. HOWEVER, THE BAND IS EXPECTED
TO SHIFT BACK WESTWARD SATURDAY MORNING, AND IS EXPECTED TO IMPACT
PARTS OF NORTHEASTERN ILLINOIS ON SATURDAY. WHILE THE FOOTPRINT OF
ACCUMULATING SNOW IS LIKELY TO BE LOWER ON SATURDAY, LOCALIZED
ADDITIONAL ACCUMULATIONS AND ASSOCIATED TRAVEL IMPACTS ARE
EXPECTED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DURING LAKE EFFECT SNOW, THE WEATHER CAN VARY FROM NEAR WHITE OUT
CONDITIONS IN VERY HEAVY SNOW TO DRY WEATHER JUST A FEW MILES AWAY.
BE PREPARED FOR RAPID CHANGES IN WEATHER, VISIBILITY, AND ROAD
CONDITIONS.
MONITOR THE LATEST FORECASTS FOR UPDATES ON THIS SITUATION.
INZ001-002-311130-
/O.CON.KLOT.WS.W.0003.000000T0000Z-260201T0000Z/
LAKE IN-PORTER-
INCLUDING THE CITIES OF PORTAGE, GARY, MERRILLVILLE, CHESTERTON,
HAMMOND, AND VALPARAISO
726 PM CST FRI JAN 30 2026
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM CST SATURDAY
* WHAT...HEAVY LAKE EFFECT SNOW WITH TOTAL SNOW ACCUMULATIONS OVER 6
INCHES EXPECTED, MAINLY NEAR AND NORTH OF US ROUTE 30. ISOLATED
TOTALS UP TO A FOOT ARE POSSIBLE.
* WHERE...LAKE IN AND PORTER COUNTIES.
* WHEN...UNTIL 6 PM CST SATURDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT TO NEARLY IMPOSSIBLE AT
TIMES NORTH OF U.S. ROUTE 30 WITH NEAR WHITE OUT CONDITIONS AND
SNOWFALL RATES OF 2 OR MORE INCHES PER HOUR UNDER THE MOST INTENSE
PORTIONS OF THE BAND.
* ADDITIONAL DETAILS...THE HEAVIEST SNOWFALL IS EXPECTED LATE THIS
EVENING THROUGH SATURDAY MORNING, WHEN LOCALLY 2 INCH PER HOUR
RATES ARE EXPECTED AT TIMES. SOME BREAKS IN THE SNOWFALL ARE
POSSIBLE AT TIMES AS THE SNOW BAND WOBBLES TONIGHT AND SATURDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DURING LAKE EFFECT SNOW, THE WEATHER CAN VARY FROM NEAR WHITE OUT
CONDITIONS IN VERY HEAVY SNOW TO DRY WEATHER JUST A FEW MILES AWAY.
BE PREPARED FOR RAPID CHANGES IN WEATHER, VISIBILITY, AND ROAD
CONDITIONS.
MONITOR THE LATEST FORECASTS FOR UPDATES ON THIS SITUATION.
ILZ108-311130-
/O.CON.KLOT.WW.Y.0007.000000T0000Z-260131T0600Z/
/O.CON.KLOT.WW.Y.0008.260131T1200Z-260131T2200Z/
EASTERN WILL-
INCLUDING THE CITIES OF PEOTONE, CRETE, AND BEECHER
726 PM CST FRI JAN 30 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CST
TONIGHT...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM TO 4 PM CST
SATURDAY...
* WHAT...TWO PERIODS OF ACCUMULATING LAKE EFFECT SNOW EXPECTED.
TOTAL SNOW ACCUMULATIONS COULD LOCALLY EXCEED 4 INCHES,
PARTICULARLY NEAR THE INDIANA STATE LINE.
* WHERE...EASTERN WILL COUNTY.
* WHEN...FOR THE FIRST WINTER WEATHER ADVISORY, UNTIL MIDNIGHT CST
TONIGHT. FOR THE SECOND WINTER WEATHER ADVISORY, FROM 6 AM TO 4 PM
CST SATURDAY.
* IMPACTS...ROADS, AND ESPECIALLY BRIDGES AND OVERPASSES, WILL
LIKELY BECOME SLICK AND HAZARDOUS. THE HAZARDOUS CONDITIONS WILL
IMPACT THIS EVENINGS COMMUTE.
* ADDITIONAL DETAILS...LAKE EFFECT SNOW IS EXPECTED TO IMPACT THE
AREA IN TWO WAVES. THE FIRST WILL OCCUR THROUGH THIS EVENING,
BEFORE THE LAKE EFFECT BAND SHIFTS EAST INTO INDIANA FOR A PERIOD
TONIGHT. THE BAND OF SNOW IS THEN EXPECTED TO SHIFT BACK WESTWARD
INTO PARTS OF NORTHEASTERN ILLINOIS SATURDAY MORNING, AND THIS
COULD RESULT IN ADDITIONAL LOCALIZED ACCUMULATIONS AND TRAVEL
IMPACTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE LATEST FORECASTS FOR UPDATES ON THIS SITUATION.
DURING LAKE EFFECT SNOW, THE WEATHER CAN VARY FROM BANDS OF LOCALLY
HEAVY SNOW TO DRY WEATHER JUST A FEW MILES AWAY. VISIBILITIES CAN
ALSO VARY GREATLY. BE PREPARED FOR RAPID CHANGES IN WEATHER,
VISIBILITY, AND ROAD CONDITIONS.
YACK
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