With arctic air in place over northeast Iowa, air temperatures dropped into the 20s below zero from January 29th into January 31st. A few sites recorded temperatures in the 30s below zero on the morning of the 31st. When combined with wind speeds of 5 to 25 mph, wind chills of 35 to 60 below were common. The coldest wind chill to occur was 60 below zero in Charles City (Floyd County) during the late evening of January 29th. Most northeast Iowa schools were closed from January 29th through the 31st. The U.S. Post Office suspended delivery operations across all of northeast Iowa on January 30th and 31st.

Extreme Cold/Wind Chill in ALLAMAKEE, IOWA
From 29-JAN-19 17:35:00 to 31-JAN-19 10:05:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Wind chills of 35 to 60 below zero were common across Allamakee County from the late afternoon of January 29th into the morning of the 31st.

Extreme Cold/Wind Chill in CHICKASAW, IOWA
From 29-JAN-19 16:35:00 to 31-JAN-19 10:35:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chills of 35 to 60 below zero were common across Chickasaw County from the late afternoon of January 29th into the morning of the 31st. The coldest wind chill to occur was 58 below zero at a mesonet station near Ionia.

Extreme Cold/Wind Chill in CLAYTON, IOWA
From 29-JAN-19 18:05:00 to 31-JAN-19 10:15:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chills of 35 to 60 below zero were common across Clayton County from the evening of January 29th into the morning of the 31st. The coldest wind chill to occur was 58 below zero at a mesonet station in Monona.

Extreme Cold/Wind Chill in FAYETTE, IOWA
From 29-JAN-19 16:55:00 to 31-JAN-19 10:35:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Wind chills of 35 to 60 below zero were common across Fayette County from the late afternoon of January 29th into the morning of the 31st. The coldest wind chill to occur was 58 below at the automated weather observing equipment for the Oelwein airport.

Extreme Cold/Wind Chill in FLOYD, IOWA
From 29-JAN-19 16:15:00 to 31-JAN-19 10:35:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Wind chills of 35 to 60 below zero were common across Floyd County from the late afternoon of January 29th into the morning of the 31st. The coldest wind chill to occur was 60 below at the automated weather observing equipment for the Charles City airport.

Extreme Cold/Wind Chill in HOWARD, IOWA
From 29-JAN-19 16:45:00 to 31-JAN-19 10:35:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chills of 35 to 55 below zero were common across Howard County from the late afternoon of January 29th into the morning of the 31st. The coldest wind chill to occur was 53 below zero at a mesonet station near Riceville.

Extreme Cold/Wind Chill in MITCHELL, IOWA
From 29-JAN-19 16:05:00 to 31-JAN-19 09:35:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chills of 35 to 55 below zero were common across Mitchell County from the late afternoon of January 29th into the morning of the 31st. The coldest wind chill to occur was 51 below zero at a mesonet station in St. Ansgar.

Extreme Cold/Wind Chill in WINNESHIEK, IOWA
From 29-JAN-19 17:35:00 to 31-JAN-19 11:35:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chills of 35 to 60 below zero were common across Winneshiek County from the late afternoon of January 29th into the morning of the 31st. The coldest wind chill to occur was 56 below zero at a mesonet station near Jackson Junction.