Very cold temperatures combined with strong winds to create dangerously low wind chill values on January 15th which continued into the morning hours of January 16th.  Low temperatures on the morning of January 15th dropped to 15 below to 20 below zero with a few colder locations.  Wind chill readings for most of January 15th ranged from 30 below to 45 below zero.

Extreme Cold/Wind Chill in WINNEBAGO, ILLINOIS
From 15-JAN-09 04:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in KANE, ILLINOIS
From 14-JAN-09 22:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in DU PAGE, ILLINOIS
From 15-JAN-09 07:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in COOK, ILLINOIS
From 15-JAN-09 09:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in KENDALL, ILLINOIS
From 15-JAN-09 03:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in GRUNDY, ILLINOIS
From 15-JAN-09 02:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in WILL, ILLINOIS
From 15-JAN-09 06:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in LA SALLE, ILLINOIS
From 15-JAN-09 04:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in LIVINGSTON, ILLINOIS
From 15-JAN-09 05:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in KANKAKEE, ILLINOIS
From 15-JAN-09 03:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in FORD, ILLINOIS
From 15-JAN-09 05:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in IROQUOIS, ILLINOIS
From 15-JAN-09 05:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in BOONE, ILLINOIS
From 15-JAN-09 04:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in LEE, ILLINOIS
From 15-JAN-09 01:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in OGLE, ILLINOIS
From 15-JAN-09 00:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in DE KALB, ILLINOIS
From 15-JAN-09 01:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in MCHENRY, ILLINOIS
From 15-JAN-09 05:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in LAKE, ILLINOIS
From 15-JAN-09 06:00:00 to 16-JAN-09 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS