December 15 was a unique day of weather across all of eastern Iowa, northwest Illinois, and far northeast Missouri. Strong low pressure developed over the Plains and quickly traversed into the Upper Mississippi River Valley. This resulted in a strong pressure gradient across the Upper Midwest that produced very strong winds of 50 to almost 70 MPH. In addition to the strong winds, all climate sites in our area set new record high temperatures, and either broke or tied all-time record December highs.

High Wind in BUCHANAN, IOWA
From 15-DEC-21 15:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at the Independence Airport measured a maximum wind gust of 67 MPH at 1155 PM.

High Wind in LINN, IOWA
From 15-DEC-21 15:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 57.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS at the Cedar Rapids Airport measured a gust of 66 MPH at 826 PM.  There was also a public report of 1 inch tree limbs down as well as shingles blown off roofs  2 miles northwest of Cedar Rapids.

High Wind in JOHNSON, IOWA
From 15-DEC-21 15:00:00 to 15-DEC-21 18:00:00 (CST-6)
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at the Iowa City Airported measured a gust of 70 MPH at 843 PM.

High Wind in JONES, IOWA
From 15-DEC-21 15:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at the Monticello Airport measured a peak wind gust of 63 MPH at 1155 PM.

High Wind in MUSCATINE, IOWA
From 15-DEC-21 15:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at the Muscatine Airport reported a peak gust of 58 MPH at 1135 PM.  A member of the general public reported a personal weather station wind gust of 62 MPH at 847 PM along with several tree branches down.

High Wind in SCOTT, IOWA
From 15-DEC-21 15:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS at the Davenport Airport reported a peak wind gust of 62 MPH at 1231 AM December 16. There were additional reports from personal weather stattions of 59 MPH in Eldridge and 63 miles per hour 3 miles southeast of Maysville at 1150 PM on December 15.

High Wind in CLINTON, IOWA
From 15-DEC-21 15:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A trained spotter reported a car port was blown over at 850 PM near Goose Lake. The AWOS at the Clinton Airport reported a gust of 56 MPH at 1247 AM. There was also a 56 MPH 1 mile west of DeWitt at 856 PM.

High Wind in DUBUQUE, IOWA
From 15-DEC-21 15:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS at the Dubuque Regional Airport reported a gust of 69 MPH at 1130 PM.

High Wind in JACKSON, IOWA
From 15-DEC-21 15:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Department of Transportation RWIS site near Maquoketa reported a 58 MPH wind gust at 950 PM.

High Wind in JEFFERSON, IOWA
From 15-DEC-21 15:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 51.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at the Fairfield Airport reported a 59 MPH gust at 855 PM.

High Wind in DES MOINES, IOWA
From 15-DEC-21 15:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 53.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS at the Burlington Airport measured a peak gust of 61 MPH at 929 PM.

High Wind in HENRY, IOWA
From 15-DEC-21 15:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at the Mount Pleasant Airport reported a peak gust of 60 MPH at 855 PM.

High Wind in LEE, IOWA
From 15-DEC-21 15:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at the Keokuk Airport reported a peak wind gust of 58 MPH at 915 PM.