Wind chills from -35 to -45 continued through the morning hours across northwest Iowa as a strong arctic surface ridge continued to slide into the Northern Plains. This continued the extreme cold which initiated during late December 2017.

Extreme Cold/Wind Chill in LYON, IOWA
From 01-JAN-18 00:00:00 to 01-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

West to northwest winds at times from 7 to 12 mph combined with air temperatures of 20 below to 30 below zero to produce bitterly cold wind chills of -40 to -45 through the morning hours of New Year's Day.  Actual temperatures reached record cold at several locations maintaining over a century of records, including Le Mars (-23), 2 miles southwest of Sioux Center (-25), Spirit Lake (-26) and Sioux City (-25). As southerly return flow developed behind the retreating ridge, not as extreme wind chills of -20 to -30 occurred from the evening of January 1st into mid morning of January 2nd.

Extreme Cold/Wind Chill in OSCEOLA, IOWA
From 01-JAN-18 00:00:00 to 01-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

West to northwest winds at times from 7 to 12 mph combined with air temperatures of 20 below to 30 below zero to produce bitterly cold wind chills of -40 to -45 through the morning hours of New Year's Day.  Actual temperatures reached record cold at several locations maintaining over a century of records, including Le Mars (-23), 2 miles southwest of Sioux Center (-25), Spirit Lake (-26) and Sioux City (-25). As southerly return flow developed behind the retreating ridge, not as extreme wind chills of -20 to -30 occurred from the evening of January 1st into mid morning of January 2nd.

Extreme Cold/Wind Chill in DICKINSON, IOWA
From 01-JAN-18 00:00:00 to 01-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

West to northwest winds at times from 7 to 12 mph combined with air temperatures of 20 below to 30 below zero to produce bitterly cold wind chills of -40 to -45 through the morning hours of New Year's Day.  Actual temperatures reached record cold at several locations maintaining over a century of records, including Le Mars (-23), 2 miles southwest of Sioux Center (-25), Spirit Lake (-26) and Sioux City (-25). As southerly return flow developed behind the retreating ridge, not as extreme wind chills of -20 to -30 occurred from the evening of January 1st into mid morning of January 2nd.

Extreme Cold/Wind Chill in SIOUX, IOWA
From 01-JAN-18 00:00:00 to 01-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

West to northwest winds at times from 7 to 12 mph combined with air temperatures of 20 below to 30 below zero to produce bitterly cold wind chills of -40 to -45 through the morning hours of New Year's Day.  Actual temperatures reached record cold at several locations maintaining over a century of records, including Le Mars (-23), 2 miles southwest of Sioux Center (-25), Spirit Lake (-26) and Sioux City (-25). As southerly return flow developed behind the retreating ridge, not as extreme wind chills of -20 to -30 occurred from the evening of January 1st into mid morning of January 2nd.

Extreme Cold/Wind Chill in O'BRIEN, IOWA
From 01-JAN-18 00:00:00 to 01-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

West to northwest winds at times from 7 to 12 mph combined with air temperatures of 20 below to 30 below zero to produce bitterly cold wind chills of -40 to -45 through the morning hours of New Year's Day.  Actual temperatures reached record cold at several locations maintaining over a century of records, including Le Mars (-23), 2 miles southwest of Sioux Center (-25), Spirit Lake (-26) and Sioux City (-25). As southerly return flow developed behind the retreating ridge, not as extreme wind chills of -20 to -30 occurred from the evening of January 1st into mid morning of January 2nd.

Extreme Cold/Wind Chill in CLAY, IOWA
From 01-JAN-18 00:00:00 to 01-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

West to northwest winds at times from 7 to 12 mph combined with air temperatures of 20 below to 30 below zero to produce bitterly cold wind chills of -40 to -45 through the morning hours of New Year's Day.  Actual temperatures reached record cold at several locations maintaining over a century of records, including Le Mars (-23), 2 miles southwest of Sioux Center (-25), Spirit Lake (-26) and Sioux City (-25). As southerly return flow developed behind the retreating ridge, not as extreme wind chills of -20 to -30 occurred from the evening of January 1st into mid morning of January 2nd.

Extreme Cold/Wind Chill in PLYMOUTH, IOWA
From 01-JAN-18 00:00:00 to 01-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

West to northwest winds at times from 7 to 12 mph combined with air temperatures of 20 below to 30 below zero to produce bitterly cold wind chills of -40 to -45 through the morning hours of New Year's Day.  Actual temperatures reached record cold at several locations maintaining over a century of records, including Le Mars (-23), 2 miles southwest of Sioux Center (-25), Spirit Lake (-26) and Sioux City (-25). As southerly return flow developed behind the retreating ridge, not as extreme wind chills of -20 to -30 occurred from the evening of January 1st into mid morning of January 2nd.

Extreme Cold/Wind Chill in CHEROKEE, IOWA
From 01-JAN-18 00:00:00 to 01-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

West to northwest winds at times from 7 to 12 mph combined with air temperatures of 20 below to 30 below zero to produce bitterly cold wind chills of -40 to -45 through the morning hours of New Year's Day.  Actual temperatures reached record cold at several locations maintaining over a century of records, including Le Mars (-23), 2 miles southwest of Sioux Center (-25), Spirit Lake (-26) and Sioux City (-25). As southerly return flow developed behind the retreating ridge, not as extreme wind chills of -20 to -30 occurred from the evening of January 1st into mid morning of January 2nd.

Extreme Cold/Wind Chill in BUENA VISTA, IOWA
From 01-JAN-18 00:00:00 to 01-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

West to northwest winds at times from 7 to 12 mph combined with air temperatures of 20 below to 30 below zero to produce bitterly cold wind chills of -40 to -45 through the morning hours of New Year's Day.  Actual temperatures reached record cold at several locations maintaining over a century of records, including Le Mars (-23), 2 miles southwest of Sioux Center (-25), Spirit Lake (-26) and Sioux City (-25). As southerly return flow developed behind the retreating ridge, not as extreme wind chills of -20 to -30 occurred from the evening of January 1st into mid morning of January 2nd.

Extreme Cold/Wind Chill in WOODBURY, IOWA
From 01-JAN-18 00:00:00 to 01-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

West to northwest winds at times from 7 to 12 mph combined with air temperatures of 20 below to 30 below zero to produce bitterly cold wind chills of -40 to -45 through the morning hours of New Year's Day.  Actual temperatures reached record cold at several locations maintaining over a century of records, including Le Mars (-23), 2 miles southwest of Sioux Center (-25), Spirit Lake (-26) and Sioux City (-25). As southerly return flow developed behind the retreating ridge, not as extreme wind chills of -20 to -30 occurred from the evening of January 1st into mid morning of January 2nd.

Extreme Cold/Wind Chill in IDA, IOWA
From 01-JAN-18 00:00:00 to 01-JAN-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

West to northwest winds at times from 7 to 12 mph combined with air temperatures of 20 below to 30 below zero to produce bitterly cold wind chills of -40 to -45 through the morning hours of New Year's Day.  Actual temperatures reached record cold at several locations maintaining over a century of records, including Le Mars (-23), 2 miles southwest of Sioux Center (-25), Spirit Lake (-26) and Sioux City (-25). As southerly return flow developed behind the retreating ridge, not as extreme wind chills of -20 to -30 occurred from the evening of January 1st into mid morning of January 2nd.