An arctic airmass was pushed into the Ohio Valley behind a cold front. Sub-zero temperatures reached the lower teens in some areas and combined with wind gusts of 30 to 45 mph, creating wind chills from 20 to 40 below zero.

Extreme Cold/Wind Chill in AUGLAIZE, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill in Minster dropped to 38 below zero.

Extreme Cold/Wind Chill in BROWN, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill 5 miles west of Winchester dropped to 26 below zero.

Extreme Cold/Wind Chill in BUTLER, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill 3 miles northeast of Beckett Ridge dropped to 32 below zero.

Extreme Cold/Wind Chill in CHAMPAIGN, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill in Mechanicsburg dropped to 40 below zero.

Extreme Cold/Wind Chill in CLARK, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill in Springfield dropped to 37 below zero.

Extreme Cold/Wind Chill in CLERMONT, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill in both Day Heights and 2 miles south of Pleasant Plain dropped to 29 below zero.

Extreme Cold/Wind Chill in CLINTON, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The wind chill at the Wilmington airport KILN dropped to 31 below zero.

Extreme Cold/Wind Chill in DARKE, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill one mile east of Union City dropped to 40 below zero.

Extreme Cold/Wind Chill in DELAWARE, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill at both the Delaware Municipal Airport and a location 3 miles north of Ostrander dropped to 31 below zero.

Extreme Cold/Wind Chill in FAIRFIELD, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill west of Lancaster dropped to 31 below zero.

Extreme Cold/Wind Chill in FAYETTE, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill at the Fayette County Airport dropped to 31 below zero.

Extreme Cold/Wind Chill in FRANKLIN, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill in Upper Arlington dropped to 34 below zero.

Extreme Cold/Wind Chill in GREENE, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The wind chill at the Wright-Patterson Air Force Base dropped to 33 below zero.

Extreme Cold/Wind Chill in MIAMI, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill east of Troy dropped to 36 below zero.

Extreme Cold/Wind Chill in MONTGOMERY, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill in Brookville dropped to 42 below zero.

Extreme Cold/Wind Chill in PICKAWAY, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill 2 miles south of Darbyville dropped to 25 below zero.

Extreme Cold/Wind Chill in PREBLE, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill north of Eaton dropped to 34 below zero.

Extreme Cold/Wind Chill in ROSS, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill southwest of Chillicothe dropped to 31 below zero.

Extreme Cold/Wind Chill in SHELBY, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Based on surrounding observations, wind chills across the county were significantly lower than 25 below zero.

Extreme Cold/Wind Chill in UNION, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The wind chill at the Union County Airport dropped to 33 below zero.

Extreme Cold/Wind Chill in WARREN, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill 4 miles south of Five Points dropped to 32 below zero.

Extreme Cold/Wind Chill in HAMILTON, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill one mile south of Cincinnati dropped to 31 below zero.

Extreme Cold/Wind Chill in HARDIN, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill in Ada dropped to 36 below zero.

Extreme Cold/Wind Chill in LICKING, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill in Summit Staton dropped to 28 below zero.

Extreme Cold/Wind Chill in LOGAN, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill 3 miles south of West Mansfield dropped to 34 below zero.

Extreme Cold/Wind Chill in MADISON, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind chill in London dropped to 34 below zero.

Extreme Cold/Wind Chill in MERCER, OHIO
From 30-JAN-19 05:00:00 to 30-JAN-19 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Based on surrounding observations, the wind chill across Mercer county dropped significantly lower than 25 below zero.