Following the snowfall on December 29 and an additional snowfall of one to three inches in the Missouri River corridor (dusting to an inch to the northeast) late on the evening of December 30 and early on December 31, a brutally cold arctic high settled across the area through New Year's Day. While winds were not exceptionally strong (mainly 7-15 mph), they were met by temperatures diving into the teens and 20's below zero. Many locations were below zero for 60 hours or longer. The extreme cold and wind chill continued into January 1st.

Extreme Cold/Wind Chill in BEADLE, SOUTH DAKOTA
From 30-DEC-17 08:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -35 to -55 prevailed over much the two day period as temperatures plummeted to the teens and 20's below zero. A coldest wind chill of -52 occurred at 0816CST at Huron on December 31. Record low maximum and minimum temperatures of -11F and -31F occurred on December 31 at Huron.

Extreme Cold/Wind Chill in KINGSBURY, SOUTH DAKOTA
From 30-DEC-17 08:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -35 to -55 prevailed over much the two day period as temperatures plummeted to the teens and 20's below zero.  Record low maximum temperatures of -10F and -15F occurred on December 30 and 31 at DeSmet.

Extreme Cold/Wind Chill in BROOKINGS, SOUTH DAKOTA
From 30-DEC-17 08:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -35 to -45 prevailed over much the two day period as temperatures plummeted to the teens and 20's below zero.  A coldest wind chill of -40 occurred at Brookings around 0800CST on December 31.

Extreme Cold/Wind Chill in MINNEHAHA, SOUTH DAKOTA
From 31-DEC-17 08:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -25 to -45 prevailed over much the two day period as temperatures plummeted to the teens and 20's below zero.  The wind chill at Sioux Falls reached a minimum of -37 at 1900CST December 31.  A record low maximum temperature of -9 was measured at Sioux Falls on December 31.

Extreme Cold/Wind Chill in MINER, SOUTH DAKOTA
From 30-DEC-17 08:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -35 to -45 prevailed over much the two day period as temperatures plummeted to the teens and 20's below zero. The minimum temperature at Howard reached -15 on December 31.

Extreme Cold/Wind Chill in LAKE, SOUTH DAKOTA
From 30-DEC-17 08:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -35 to -45 prevailed over much the two day period as temperatures plummeted to the teens and 20's below zero. A coldest wind chill reading of -44 was recorded at Madison around 0755CST. The minimum temperature at Madison reached -23 on December 31.

Extreme Cold/Wind Chill in MOODY, SOUTH DAKOTA
From 30-DEC-17 08:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -35 to -45 prevailed over much the two day period as temperatures plummeted to the teens and 20's below zero.  The wind chill at Flandreau reached a minimum of -41 at 1900CST December 31.

Extreme Cold/Wind Chill in MCCOOK, SOUTH DAKOTA
From 31-DEC-17 08:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -25 to -45 prevailed over much the two day period as temperatures plummeted to the teens and 20's below zero.  A record low maximum and minimum temperature of -15 and -26 was measured five miles northeast of Salem on December 31.

Extreme Cold/Wind Chill in HANSON, SOUTH DAKOTA
From 31-DEC-17 06:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -25 to -45 prevailed over much the two day period as temperatures plummeted to the teens and 20's below zero.  A record low maximum temperature of -9 was measured at Alexandria on December 31.

Extreme Cold/Wind Chill in SANBORN, SOUTH DAKOTA
From 31-DEC-17 06:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -25 to -45 prevailed over much the two day period as temperatures plummeted to the teens and 20's below zero.  A record low minimum temperature of -25 was measured four miles north northeast of Forestburg on December 31.

Extreme Cold/Wind Chill in JERAULD, SOUTH DAKOTA
From 31-DEC-17 06:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Bitterly cold wind chills of -25 to -45 prevailed over much the two day period as temperatures plummeted to 10 below to 20 below zero with winds from 5 to 15 mph. The minimum temperature at Wessington Springs on December 31 was -20.

Extreme Cold/Wind Chill in BRULE, SOUTH DAKOTA
From 31-DEC-17 06:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Bitterly cold wind chills of -25 to -45 prevailed over much the two day period as temperatures plummeted to 10 below to 20 below zero with winds from 5 to 15 mph. The minimum wind chill measured at Chamberlain was -40 around 0900CST. A record low maximum temperature of -8 occurred five miles south of Chamberlain on December 31.

Extreme Cold/Wind Chill in AURORA, SOUTH DAKOTA
From 31-DEC-17 06:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Bitterly cold wind chills of -25 to -45 prevailed over much the two day period as temperatures plummeted to 10 below to 20 below zero with winds from 5 to 15 mph. The minimum wind chill measured at White Lake was -41 at 2300CST December 31. A record low minimum temperature of -23 occurred at White Lake on December 31.

Extreme Cold/Wind Chill in DAVISON, SOUTH DAKOTA
From 31-DEC-17 06:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Bitterly cold wind chills of -25 to -45 prevailed over much the two day period as temperatures plummeted to 10 below to 20 below zero with winds from 5 to 15 mph. The minimum wind chill measured at Mitchell was -41 at 0700CST December 31. A record low minimum and maximum temperature of -10 and -22 occurred at Mitchell on December 31.

Extreme Cold/Wind Chill in LINCOLN, SOUTH DAKOTA
From 31-DEC-17 08:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -25 to -45 prevailed over much the two day period as temperatures plummeted to the teens to around 20 below zero. The low temperature in Canton was -19 on December 31.

Extreme Cold/Wind Chill in UNION, SOUTH DAKOTA
From 31-DEC-17 08:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -20 to -40 prevailed over much the two day period as temperatures plummeted to the teens to around 20 below zero. A minimum wind chill of -36 was recorded at Beresford around 1000CST on December 31. The low temperature in Beresford was -32 on December 31.

Extreme Cold/Wind Chill in CLAY, SOUTH DAKOTA
From 31-DEC-17 08:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -20 to -40 prevailed over much the two day period as temperatures plummeted to the teens to around 20 below zero. The low temperature two miles southeast of Vermillion was -19 on December 31.

Extreme Cold/Wind Chill in YANKTON, SOUTH DAKOTA
From 31-DEC-17 06:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -20 to -40 prevailed over much the two day period as temperatures plummeted to the teens to around 20 below zero. A minimum wind chill of -38 was recorded at Yankton on December 31.

Extreme Cold/Wind Chill in BON HOMME, SOUTH DAKOTA
From 31-DEC-17 06:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -20 to -40 prevailed over much the two day period as temperatures plummeted to the teens to around 20 below zero. The minimum temperature was -18 at Tyndall on December 31.

Extreme Cold/Wind Chill in HUTCHINSON, SOUTH DAKOTA
From 31-DEC-17 06:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -20 to -40 prevailed over much the two day period as temperatures plummeted to the teens to around 20 below zero. A minimum wind chill of -36 was recorded at Parkson around 2100CST December 31.  The minimum temperature was -25 at Parkston on December 31.

Extreme Cold/Wind Chill in DOUGLAS, SOUTH DAKOTA
From 31-DEC-17 06:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -20 to -40 prevailed over much the two day period as temperatures plummeted to the teens to around 20 below zero.

Extreme Cold/Wind Chill in CHARLES MIX, SOUTH DAKOTA
From 31-DEC-17 06:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -20 to -40 prevailed over much the two day period as temperatures plummeted to the teens to around 20 below zero. A record low maximum temperature of -9 occurred two miles northeast of Academy on December 31.

Extreme Cold/Wind Chill in GREGORY, SOUTH DAKOTA
From 31-DEC-17 06:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -25 to -45 prevailed over much the two day period as temperatures plummeted to the teens to around 20 below zero. A record low maximum temperature of -5 occurred at Gregory on December 31.

Extreme Cold/Wind Chill in TURNER, SOUTH DAKOTA
From 31-DEC-17 08:00:00 to 31-DEC-17 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Even though winds were 10 to 20 mph early on December 30 and generally 5 to 15 mph at other times, bitterly cold wind chills of -20 to -40 prevailed over much the two day period as temperatures plummeted to the teens to around 20 below zero.