Very cold air with temperatures dropping to as cold as 20 below zero was accompanied by wind speeds of 10 to 20 mph. These cold temperatures and winds drove wind chill readings down to the 35 to 45 degree below zero range over a Huron to Brookings to Sioux Falls triangle in southeast South Dakota, from the evening of February 19th through the morning of February 20th.

Cold/Wind Chill in MCCOOK, SOUTH DAKOTA
From 19-FEB-08 21:00:00 to 20-FEB-08 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winds of 10 to 20 mph accompanied by temperatures dropping to as cold as 20 below zero lowered wind chill readings to the 35 to 45 below zero range.

Cold/Wind Chill in BROOKINGS, SOUTH DAKOTA
From 19-FEB-08 21:00:00 to 20-FEB-08 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winds of 10 to 20 mph accompanied by temperatures dropping to as cold as 20 below zero lowered wind chill readings to the 35 to 45 below zero range.

Cold/Wind Chill in MOODY, SOUTH DAKOTA
From 19-FEB-08 21:00:00 to 20-FEB-08 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winds of 10 to 20 mph accompanied by temperatures dropping to as cold as 20 below zero lowered wind chill readings to the 35 to 45 below zero range.

Cold/Wind Chill in MINNEHAHA, SOUTH DAKOTA
From 19-FEB-08 21:00:00 to 20-FEB-08 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winds of 10 to 20 mph accompanied by temperatures dropping to as cold as 20 below zero lowered wind chill readings to the 35 to 45 below zero range.

Cold/Wind Chill in LINCOLN, SOUTH DAKOTA
From 19-FEB-08 21:00:00 to 20-FEB-08 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winds of 10 to 20 mph accompanied by temperatures dropping to as cold as 20 below zero lowered wind chill readings to the 35 to 45 below zero range.

Cold/Wind Chill in KINGSBURY, SOUTH DAKOTA
From 19-FEB-08 21:00:00 to 20-FEB-08 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winds of 10 to 20 mph accompanied by temperatures dropping to as cold as 20 below zero lowered wind chill readings to the 35 to 45 below zero range.

Cold/Wind Chill in MINER, SOUTH DAKOTA
From 19-FEB-08 21:00:00 to 20-FEB-08 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winds of 10 to 20 mph accompanied by temperatures dropping to as cold as 20 below zero lowered wind chill readings to the 35 to 45 below zero range.

Cold/Wind Chill in BEADLE, SOUTH DAKOTA
From 19-FEB-08 21:00:00 to 20-FEB-08 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winds of 10 to 20 mph accompanied by temperatures dropping to as cold as 20 below zero lowered wind chill readings to the 35 to 45 below zero range.

Cold/Wind Chill in LAKE, SOUTH DAKOTA
From 19-FEB-08 21:00:00 to 20-FEB-08 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winds of 10 to 20 mph accompanied by temperatures dropping to as cold as 20 below zero lowered wind chill readings to the 35 to 45 below zero range.