Arctic air pushed into the area behind an exiting storm system. High temperatures were below zero on the 17th, with temperatures dropping to 15 below to 35 below zero on the morning of the 18th. An official NWS cooperative observer in Hoover recorded a low temperature of 39 below zero on the morning of the 18th. Wind chill values were as low as 45 below zero across the area.

Extreme Cold/Wind Chill in SOUTHERN FOOT HILLS, SOUTH DAKOTA
From 16-DEC-16 19:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in CENTRAL BLACK HILLS, SOUTH DAKOTA
From 16-DEC-16 20:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in SOUTHERN BLACK HILLS, SOUTH DAKOTA
From 16-DEC-16 20:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in CUSTER CO PLAINS, SOUTH DAKOTA
From 16-DEC-16 21:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in PENNINGTON CO PLAINS, SOUTH DAKOTA
From 16-DEC-16 22:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in HAAKON, SOUTH DAKOTA
From 16-DEC-16 22:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in FALL RIVER, SOUTH DAKOTA
From 16-DEC-16 20:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in OGLALA LAKOTA, SOUTH DAKOTA
From 16-DEC-16 21:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in JACKSON, SOUTH DAKOTA
From 16-DEC-16 22:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in BENNETT, SOUTH DAKOTA
From 16-DEC-16 22:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in MELLETTE, SOUTH DAKOTA
From 17-DEC-16 00:00:00 to 18-DEC-16 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in TODD, SOUTH DAKOTA
From 17-DEC-16 00:00:00 to 18-DEC-16 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in TRIPP, SOUTH DAKOTA
From 17-DEC-16 01:00:00 to 18-DEC-16 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in STURGIS / PIEDMONT FOOTHILLS, SOUTH DAKOTA
From 16-DEC-16 21:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in SOUTHERN MEADE CO PLAINS, SOUTH DAKOTA
From 16-DEC-16 22:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in HERMOSA FOOTHILLS, SOUTH DAKOTA
From 16-DEC-16 21:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in HARDING, SOUTH DAKOTA
From 16-DEC-16 18:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in PERKINS, SOUTH DAKOTA
From 16-DEC-16 18:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in BUTTE, SOUTH DAKOTA
From 16-DEC-16 19:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in NORTHERN MEADE CO PLAINS, SOUTH DAKOTA
From 16-DEC-16 20:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in ZIEBACH, SOUTH DAKOTA
From 16-DEC-16 21:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Extreme Cold/Wind Chill in NORTHERN BLACK HILLS, SOUTH DAKOTA
From 16-DEC-16 20:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Extreme Cold/Wind Chill in NORTHERN FOOT HILLS, SOUTH DAKOTA
From 16-DEC-16 20:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Extreme Cold/Wind Chill in RAPID CITY, SOUTH DAKOTA
From 16-DEC-16 21:00:00 to 18-DEC-16 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations