An Arctic airmass settled over the area, with high temperatures remaining below zero in most areas and low temperatures dropping to 15 below to 35 below zero, with the lowest values over northwestern South Dakota. Wind chills as low as 45 below zero developed over northwestern South Dakota.

Cold/Wind Chill in BUTTE, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in HAAKON, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Cold/Wind Chill in HARDING, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Cold/Wind Chill in NORTHERN MEADE CO PLAINS, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in JACKSON, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in MELLETTE, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in PERKINS, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in ZIEBACH, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in PENNINGTON CO PLAINS, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in SOUTHERN MEADE CO PLAINS, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in CENTRAL BLACK HILLS, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in CUSTER CO PLAINS, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in BENNETT, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in FALL RIVER, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in HERMOSA FOOTHILLS, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in NORTHERN BLACK HILLS, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in TRIPP, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in TODD, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in STURGIS / PIEDMONT FOOTHILLS, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in RAPID CITY, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Cold/Wind Chill in OGLALA LAKOTA, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in SOUTHERN BLACK HILLS, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in SOUTHERN FOOT HILLS, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in NORTHERN FOOT HILLS, SOUTH DAKOTA
From 30-DEC-17 18:00:00 to 31-DEC-17 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS