Snow developed across far northern Illinois during the morning of February 16th and continued into the late evening.  The snow was heavy at times with a band of 3 to 5 inches across far northern Illinois and a band of 5 to 8 inches of snow across far northwest Illinois.  The highest storm total snowfall amounts included 7.0 inches in Roscoe; 6.8 inches in Rockton; 5.6 inches four miles north northwest of Rockford and 3.6 inches at the Rockford Airport.
A wintry mix developed south of the snow generally between Interstates 88 and 80 where light freezing rain occurred during the day and then a period of snow occurred in the evening.  Measured ice accumulations included 0.25 inches at Sugar Grove Airport; 0.10 inches at DuPage Airport; 0.06 inches at Chicago O'Hare Airport; 0.03 inches at Chicago Executive Airport in Wheeling and 0.02 inches at Chicago Midway Airport.
Winds were gusting as high as 45 mph and a tree was blown down, falling on four  pedestrians on the Northwestern University Campus in Evanston.  Three were transported to a hospital with injuries, one with a serious head injury.  The fourth was treated at the scene.

Winter Storm in WINNEBAGO, ILLINOIS
From 16-FEB-23 06:00:00 to 16-FEB-23 21:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in BOONE, ILLINOIS
From 16-FEB-23 07:00:00 to 16-FEB-23 10:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in MCHENRY, ILLINOIS
From 16-FEB-23 08:00:00 to 16-FEB-23 22:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in LAKE, ILLINOIS
From 16-FEB-23 08:00:00 to 16-FEB-23 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in OGLE, ILLINOIS
From 16-FEB-23 06:00:00 to 16-FEB-23 21:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in LEE, ILLINOIS
From 16-FEB-23 08:00:00 to 16-FEB-23 21:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in DE KALB, ILLINOIS
From 16-FEB-23 08:00:00 to 16-FEB-23 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in KANE, ILLINOIS
From 16-FEB-23 07:00:00 to 16-FEB-23 22:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in DU PAGE, ILLINOIS
From 16-FEB-23 07:00:00 to 16-FEB-23 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in NORTHERN COOK COUNTY, ILLINOIS
From 16-FEB-23 08:00:00 to 16-FEB-23 23:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in CENTRAL COOK COUNTY, ILLINOIS
From 16-FEB-23 08:00:00 to 17-FEB-23 00:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in SOUTHERN COOK COUNTY, ILLINOIS
From 16-FEB-23 14:00:00 to 17-FEB-23 00:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in LA SALLE, ILLINOIS
From 16-FEB-23 08:00:00 to 16-FEB-23 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in KENDALL, ILLINOIS
From 16-FEB-23 08:00:00 to 16-FEB-23 22:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in GRUNDY, ILLINOIS
From 16-FEB-23 15:00:00 to 16-FEB-23 22:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in NORTHERN WILL COUNTY, ILLINOIS
From 16-FEB-23 09:00:00 to 16-FEB-23 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in EASTERN WILL COUNTY, ILLINOIS
From 16-FEB-23 14:00:00 to 17-FEB-23 00:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in SOUTHERN WILL COUNTY, ILLINOIS
From 16-FEB-23 14:00:00 to 16-FEB-23 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong Wind in NORTHERN COOK COUNTY, ILLINOIS
From 16-FEB-23 12:09:00 to 16-FEB-23 12:09:00 (CST-6)
Magnitude: 39.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree fell on four pedestrians near the intersection of Sheridan Road and Library Place on the Northwestern University Campus in Evanston.  Three were transported to the hospital with injuries, one with a serious head injury.  The fourth was treated at the scene.  The tree fell due to a combination of snow, ice and wind.