After a clipper system dropped from 1 to 4 inches of snow on the 13th, Arctic air and blustery north winds pushed into the area.  The coldest air and the lowest wind chills of the season spread across much of central and northeast South Dakota. Wind chills fell to 35 to 50 degrees below zero late in the evening of the 13th and remained through the 14th and into the mid morning hours of the 15th. Across northeast South Dakota, wind chills were as low as 60 degrees below zero by the morning of the 15th. Many vehicles did not start because of the extreme cold and several schools had delayed starts.
The Arctic high pressure area settled in on the morning of the 15th bringing the coldest temperatures to the region in many years. The combination of a fresh and deep snow pack, clear skies, and light winds allowed temperatures to fall to record levels at many locations on the 15th. Daytime highs remained well below zero across the area. This was one of the coldest days that most areas experienced since the early 1970s. The records were broken by 1 to as much as 7 degrees. Some of the record lows included, -30 degrees at Kennebec; -31 degrees at Sisseton; -32 degrees at Milbank; -33 degrees at Mobridge; -35 degrees at Andover and near Summit; -38 degrees at Eureka; -39 degrees 8 miles north of Columbia and Castlewood; -42 degrees at Aberdeen; and -47 degrees at Pollock. Some near record low temperatures included, -24 degrees at Pierre; -29 degrees at Redfield and Victor; -32 degrees at Roscoe; and -34 degrees at Watertown. In Aberdeen, the low temperature of -42 degrees tied the third coldest temperature ever recorded. The coldest temperature ever recorded in Aberdeen was -46 degrees.

Extreme Cold/Wind Chill in WALWORTH, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: ASOS

Extreme Cold/Wind Chill in EDMUNDS, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in CAMPBELL, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in SULLY, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in MCPHERSON, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in HYDE, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in POTTER, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in HUGHES, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: ASOS

Extreme Cold/Wind Chill in FAULK, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in MARSHALL, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in DEWEY, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in CLARK, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in CODINGTON, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: ASOS

Extreme Cold/Wind Chill in BROWN, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: ASOS

Extreme Cold/Wind Chill in HAMLIN, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in SPINK, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in CORSON, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in STANLEY, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in DAY, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in ROBERTS, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: ASOS

Extreme Cold/Wind Chill in DEUEL, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in GRANT, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet

Extreme Cold/Wind Chill in HAND, SOUTH DAKOTA
From 13-JAN-09 21:00:00 to 15-JAN-09 10:00:00 (CST-6)
Reported by: Mesonet