Snow developed along an Arctic cold front as it sliced southeast across southern Illinois during the morning hours. As the front slowed down over the Tennessee Valley late in the day, a weak surface low developed on the front. This caused snow to linger across the Ohio River counties through the evening hours. The result was an area of heavy snowfall from Vienna south and east, where 4 to 7 inches was reported. The heaviest reported snowfall was in Massac County near Metropolis, where 7 inches fell. Across the remainder of southern Illinois, including Marion, Carbondale, and Harrisburg, amounts ranged from 1 to 3 inches. Visibility was frequently reduced below one mile in the heavy snowfall area. Much of the snow melted on treated road surfaces during the day, but conditions rapidly deteriorated after dark as temperatures dropped through the 20's. Wind chill indices were in the teens during most of the snowstorm. Actual air temperatures fell into the teens as the snow ended. These cold temperatures reduced the effectiveness of road salt, which slowed recovery efforts in the wake of the storm. The new snowfall on top of snow from the January 12th storm raised total snow depths to near 10 inches near the Ohio River.

Heavy Snow in ALEXANDER, ILLINOIS
From 15-JAN-18 08:00:00 to 15-JAN-18 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in PULASKI, ILLINOIS
From 15-JAN-18 08:00:00 to 15-JAN-18 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in JOHNSON, ILLINOIS
From 15-JAN-18 08:00:00 to 15-JAN-18 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in MASSAC, ILLINOIS
From 15-JAN-18 08:00:00 to 15-JAN-18 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in POPE, ILLINOIS
From 15-JAN-18 08:00:00 to 15-JAN-18 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in HARDIN, ILLINOIS
From 15-JAN-18 08:00:00 to 15-JAN-18 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in JEFFERSON, ILLINOIS
From 15-JAN-18 04:00:00 to 15-JAN-18 10:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in PERRY, ILLINOIS
From 15-JAN-18 03:00:00 to 15-JAN-18 10:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WAYNE, ILLINOIS
From 15-JAN-18 04:00:00 to 15-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in EDWARDS, ILLINOIS
From 15-JAN-18 05:00:00 to 15-JAN-18 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WABASH, ILLINOIS
From 15-JAN-18 06:00:00 to 15-JAN-18 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in FRANKLIN, ILLINOIS
From 15-JAN-18 05:00:00 to 15-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in HAMILTON, ILLINOIS
From 15-JAN-18 05:00:00 to 15-JAN-18 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WHITE, ILLINOIS
From 15-JAN-18 06:00:00 to 15-JAN-18 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in JACKSON, ILLINOIS
From 15-JAN-18 04:00:00 to 15-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WILLIAMSON, ILLINOIS
From 15-JAN-18 06:00:00 to 15-JAN-18 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in SALINE, ILLINOIS
From 15-JAN-18 07:00:00 to 15-JAN-18 15:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in GALLATIN, ILLINOIS
From 15-JAN-18 07:00:00 to 15-JAN-18 15:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in UNION, ILLINOIS
From 15-JAN-18 07:00:00 to 15-JAN-18 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter