Strong high pressure built southward out of Canada, led by a weak wave of low pressure which increased the surface pressure gradient, and dropped a swath of light snowfall across southeast South Dakota and parts of southwest Minnesota. The coldest wind chill across southeast South Dakota generally ranged from 30 to 40 below zero.

Cold/Wind Chill in GREGORY, SOUTH DAKOTA
From 31-DEC-21 18:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: AWOS

Wind chills dropped as low as -31F at Gregory (AWOS site K9D1). The cold wind chills continued into January.

Cold/Wind Chill in DOUGLAS, SOUTH DAKOTA
From 31-DEC-21 18:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -33 at a South Dakota Road Weather Information System 1 mile northwest of Tripp (site SD570). The cold wind chills continued into January.

Extreme Cold/Wind Chill in BEADLE, SOUTH DAKOTA
From 31-DEC-21 19:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills reached as low as -38F at the South Dakota Road Weather Information System location near Wolsey (site SD582). The extreme wind chills continued into January.

Extreme Cold/Wind Chill in KINGSBURY, SOUTH DAKOTA
From 31-DEC-21 19:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: AWOS

Wind chills reached as low as -35F at De Smet (site K6V5). The extreme wind chills continued into January.

Cold/Wind Chill in YANKTON, SOUTH DAKOTA
From 31-DEC-21 21:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: AWOS

Wind chills dropped as low as -31F at Yankton (site KYKN). The cold wind chills continued into January.

Extreme Cold/Wind Chill in BROOKINGS, SOUTH DAKOTA
From 31-DEC-21 22:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Mesonet

Wind chills reached as low as -37F at the South Dakota State Mesonet site at Oak Lake (OAKS2). The extreme wind chills continued into January.

Cold/Wind Chill in JERAULD, SOUTH DAKOTA
From 31-DEC-21 12:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: RAWS

Wind chills dropped as low as -34F 18 miles south southwest of Wessington (site RHUS2). The cold wind chills continued into January.

Cold/Wind Chill in SANBORN, SOUTH DAKOTA
From 31-DEC-21 15:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -33F at a South Dakota Road Weather Information System 3 miles east-southeast of Forestburg  (site SD527). The cold wind chills continued into January.

Cold/Wind Chill in MINER, SOUTH DAKOTA
From 31-DEC-21 17:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -35 at a South Dakota Road Weather Information System 1 mile west of Howard (site SD592), but the coldest value was present for less than an hour. The cold wind chills continued into January.

Cold/Wind Chill in BRULE, SOUTH DAKOTA
From 31-DEC-21 17:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -33F at a South Dakota Road Weather Information System near Kimball (site SD537). The cold wind chills continued into January.

Cold/Wind Chill in MCCOOK, SOUTH DAKOTA
From 31-DEC-21 20:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -34F at a South Dakota Road Weather Information System 3 miles southeast of Montrose (site SD547). The cold wind chills continued into January.

Cold/Wind Chill in MINNEHAHA, SOUTH DAKOTA
From 31-DEC-21 20:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -35F at a South Dakota Road Weather Information System 2 miles west of Dell Rapids (site SD520), but the coldest value was present for less than an hour. The cold wind chills continued into January.

Cold/Wind Chill in CHARLES MIX, SOUTH DAKOTA
From 31-DEC-21 19:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: RAWS

Wind chills dropped as low as -31F 7 miles west of Geddes (RAWS site RLAS2). The cold wind chills continued into January.

Cold/Wind Chill in HUTCHINSON, SOUTH DAKOTA
From 31-DEC-21 17:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -33F at a South Dakota Road Weather Information System 1 mile northwest of Tripp (site SD570). The cold wind chills continued into January.

Cold/Wind Chill in BON HOMME, SOUTH DAKOTA
From 31-DEC-21 19:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -31F at a South Dakota Road Weather Information System 4 miles east-southeast of Tyndall (site SD571). The cold wind chills continued into January.

Cold/Wind Chill in UNION, SOUTH DAKOTA
From 31-DEC-21 23:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -30F at the South Dakota Road Weather Information System 3 miles south-southwest of Beresford (site SD508). The cold wind chills continued into January.

Winter Weather in JERAULD, SOUTH DAKOTA
From 31-DEC-21 05:15:00 to 31-DEC-21 13:30:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 3.0 inches at Wessington Springs (site WSPS2).

Cold/Wind Chill in LAKE, SOUTH DAKOTA
From 31-DEC-21 20:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: AWOS

Wind chills dropped as low as -33F at Madison (site KMDS). The cold wind chills continued into January.

Extreme Cold/Wind Chill in MOODY, SOUTH DAKOTA
From 31-DEC-21 23:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills reached as low as -37F at the South Dakota Road Weather Information System site 13 miles west of Ward (site SD577). The extreme wind chills continued into January.

Cold/Wind Chill in AURORA, SOUTH DAKOTA
From 31-DEC-21 16:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Mesonet

Wind chills dropped as low as -34F at a South Dakota State Mesonet site at White Lake (site WTES2). The cold wind chills continued into January.

Cold/Wind Chill in DAVISON, SOUTH DAKOTA
From 31-DEC-21 18:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: ASOS

Wind chills dropped as low as -32F at Mitchell (site KMHE). The cold wind chills continued into January.

Cold/Wind Chill in HANSON, SOUTH DAKOTA
From 31-DEC-21 17:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -35F at a South Dakota Road Weather Information System 3 miles east-northeast of Alexandria (site SD502), but the coldest value was present for less than an hour. The cold wind chills continued into January.

Cold/Wind Chill in TURNER, SOUTH DAKOTA
From 31-DEC-21 19:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -35F at a South Dakota Road Weather Information System 5 miles south of Freeman (site SD530), but the coldest readings did last up to an hour. The cold wind chills continued into January.

Cold/Wind Chill in LINCOLN, SOUTH DAKOTA
From 31-DEC-21 22:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -29F at a South Dakota Road Weather Information System 10 miles east of Davis (site SD519). The cold wind chills continued into January.

Cold/Wind Chill in CLAY, SOUTH DAKOTA
From 31-DEC-21 22:00:00 to 31-DEC-21 23:59:00 (CST-6)
Reported by: Department of Highways

Wind chills dropped as low as -29F at the South Dakota Road Weather Information System 2 miles west-southwest of Gayville (site SD532). The cold wind chills continued into January.

Winter Weather in BRULE, SOUTH DAKOTA
From 31-DEC-21 05:15:00 to 31-DEC-21 13:30:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 4.1 inches 5 miles south of Chamberlain (site CBRS2) and 3.5 inches at Chamberlain and 2 miles south of Pukwana.

Winter Weather in SANBORN, SOUTH DAKOTA
From 31-DEC-21 05:30:00 to 31-DEC-21 13:30:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 3.0 inches 3 miles northeast of Forestburg (site FTBS2).