A potent winter storm produced widespread heavy snow, along with freezing rain and sleet, across the region in the afternoon of the 29th and into the early morning hours of the 30th. 8 to 12 inches of snow fell in the heaviest band between Interstate 80 and U.S. Highway 20. The highest freezing rain accumulations occurred along the U.S. Highway 34 corridor from Fairfield, IA to Oquawka, IL, where 0.2 to 0.3 inches of glaze ice was reported. Thunderstorms also occurred in eastern Iowa Tuesday evening, and resulted in extreme snowfall rates of 2 to 3 inches per hour. Key impacts: transportation delays and traffic accidents, along with some isolated power outages.

Winter Storm in DUBUQUE, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 02:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The official observation at the Dubuque Regional Airport was 7.4 inches. A trained spotter reported 5.8 inches 1 miles south of Edmore.

Winter Storm in JACKSON, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall reports ranged from 8.0 inches 2 mile southwest of Saint Donatus to 12.0 inches by the COOP Observer in Bellevue.

Winter Storm in JONES, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall reports ranged from 7.0 inches by a trained spotter in Wyoming to a public report of 10.1 inches in Anamosa. The COOP site 3 miles southwest of Anamosa reported 7.5 inches.

Winter Storm in DELAWARE, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 02:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP Observer in Manchester reported 5.4 inches of snow.

Winter Storm in BUCHANAN, IOWA
From 29-DEC-20 12:00:00 to 29-DEC-20 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall reports ranged from of 5.5 inches from the COOP observer 4 miles west of Stanley to 6.0 inches from a CoCoRAHS observer 0.9 miles northwest of Independence.

Winter Storm in BENTON, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall reports ranged from 6.0 inches from the COOP observer in 1 mile east northeast of Vinton to a public report of 8.0 inches in Vinton. 6.8 inches was also reported by the COOP observer in Belle Plaine.

Winter Storm in LINN, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 01:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter snowfall reports ranged from 6.0 inches 3 miles west of Cedar Rapids to 12.0 inches 1 mile south southwest of Hiawatha and 1 mile east northeast of Fairfax.

Winter Storm in CEDAR, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall reports ranged from 6.0 inches from a trained spotter in Durant to 10.5 inches from the COOP observer in Lowden.

Winter Storm in CLINTON, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer in Clinton reported 6.7 inches of snow and 0.2 inches of ice accumulation. Other snowfall reports ranged from 8.8 inches 2 miles west northwest of Charlotte to 11.0 inches in Charlotte.

Winter Storm in IOWA, IOWA
From 29-DEC-20 12:00:00 to 29-DEC-20 21:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall reports ranged from a public report of 7.5 inches 1 miles west of Amana to 11.1 inches from a trained spotter in Williamsburg.

Winter Storm in JOHNSON, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 01:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall reports ranged from 9.0 inches 1 mile south of Hills and 1 mile east of Iowa CIty to 11.0 inches in Solon.

Winter Storm in MUSCATINE, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 04:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer 2 miles north of Muscatine reported 6.0 inches. Other snowfall reports ranged from a public report of 5.7 inches 1 mile north of Fruitland to 6.5 inches 2.1 miles north of Muscatine. Additionally, 0.3 inches of ice accumulation was reported in Muscatine.

Winter Storm in SCOTT, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 04:15:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Official observation at the NWS Office at the Davenport Municipal Airport was 9.1 inches. Additional snowfall reports ranged from 7.5 inches of snow from a trained spotter 1 mile northwest of Davenport to 10.0 from an NWS employee in Park View. Ice accumulation reports were 0.2 inches in Davenport, Bettendorf, and Park View.

Winter Storm in KEOKUK, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 03:15:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer in Sigourney reported 4.5 inches of snow and sleet. Also reported that icing occurred.

Winter Storm in WASHINGTON, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall reports ranged from 4.0 inches from the COOP observer in Washington to 6.5 inches 2 miles south of Washington. A trained spotter 4 miles north northwest of Wellman reported 0.1 inches of ice accumulation.

Winter Storm in JEFFERSON, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall reports ranged from 4.0 inches from the COOP observer 1 mile north northeast of Fairfield to a public report of 5.0 inches 1 mile southwest of Perlee. There was also a public report of 0.25 inches of ice accumulation 1 mile southwest of Perlee.

Winter Storm in LOUISA, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 04:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter and the COOP observer in Columbus Junction reported 4.0 inches of snow, along with some freezing rain accumulations.

Winter Storm in HENRY, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 04:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters and COOP observers reported 3 to 4 inches of snow and ice accumulations near 0.25 inches.

Winter Storm in DES MOINES, IOWA
From 29-DEC-20 12:00:00 to 30-DEC-20 05:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters and COOP observers reported 4 inches of snow and ice accumulations near 0.25 inches.