A strong upper level wave lifted out of the southwestern U.S. and closed off moving across Iowa by early on January 19. A band of snow developed within the leading warm advection zone from northern Nebraska to northern Iowa by late afternoon on January 18, and with unstable conditions near the frontal axis, the band evolved into a more narrow zone of intense snowfall into the overnight hours. Dry air poised to the north created a sharp gradient to snowfall on the north side of the band.

Winter Weather in AURORA, SOUTH DAKOTA
From 18-JAN-23 16:00:00 to 19-JAN-23 03:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 5.8 inches at White Lake and 3.5 inches 4 miles northwest of Stickney.

Winter Weather in MCCOOK, SOUTH DAKOTA
From 18-JAN-23 19:00:00 to 19-JAN-23 04:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 5.0 inches at Bridgewater and 4.0 inches 5 miles northeast of Salem.

Winter Weather in MINNEHAHA, SOUTH DAKOTA
From 18-JAN-23 18:00:00 to 19-JAN-23 05:00:00 (CST-6)
Reported by: CoCoRaHS

Snowfall totaled 4.5 inches to 5.5 inches at several locations around the Sioux Falls metro area, as well as 5.0 inches near Garretson and 4.0 inches 3 miles northeast of Crooks.

Winter Weather in DOUGLAS, SOUTH DAKOTA
From 18-JAN-23 17:00:00 to 19-JAN-23 04:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 4.5 inches 10 miles west of Dimock and 3.3 inches 2 miles south of Armour.

Winter Weather in HUTCHINSON, SOUTH DAKOTA
From 18-JAN-23 18:00:00 to 19-JAN-23 04:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 4.0 inches at Menno.

Winter Storm in GREGORY, SOUTH DAKOTA
From 18-JAN-23 10:00:00 to 19-JAN-23 05:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 9.0 inches 9 miles north of Gregory and 9 miles south of Dallas, 8.5 inches 6 miles south-southwest of Herrick, 7.4 inches 4 miles south-southwest of Pickstown, and 7.0 inches at Gregory.

Winter Storm in CHARLES MIX, SOUTH DAKOTA
From 18-JAN-23 14:00:00 to 19-JAN-23 04:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 7.2 inches at Wagner and 7.0 inches 2 miles northeast of Academy and 2 miles north of Lake Andes.

Winter Storm in BON HOMME, SOUTH DAKOTA
From 18-JAN-23 17:00:00 to 19-JAN-23 06:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 6.6 inches at Tyndall and 6.0 inches at Springfield.

Winter Storm in YANKTON, SOUTH DAKOTA
From 18-JAN-23 17:00:00 to 19-JAN-23 06:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 10.0 inches at Yankton and 8.0 inches at Lesterville.

Winter Storm in LINCOLN, SOUTH DAKOTA
From 18-JAN-23 18:00:00 to 19-JAN-23 06:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 8.0 inches at Beresford and 6.8 inches near Canton.

Winter Storm in CLAY, SOUTH DAKOTA
From 18-JAN-23 17:00:00 to 19-JAN-23 06:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 14.0 inches at Vermillion and 6.5 inches 6 miles southeast of Centerville.

Winter Storm in UNION, SOUTH DAKOTA
From 18-JAN-23 17:00:00 to 19-JAN-23 06:00:00 (CST-6)
Reported by: CoCoRaHS

Snowfall totaled 8.0 inches at Beresford, and Elk Point and North Sioux City.

Winter Weather in BRULE, SOUTH DAKOTA
From 18-JAN-23 10:00:00 to 19-JAN-23 03:00:00 (CST-6)
Reported by: CoCoRaHS

Snowfall totaled 6.5 inches 8 miles south-southwest of Chamberlain and 6.2 inches 2 miles south of Pukwana.

Winter Storm in TURNER, SOUTH DAKOTA
From 18-JAN-23 18:00:00 to 19-JAN-23 06:00:00 (CST-6)
Reported by: CoCoRaHS

Snowfall totaled 7.9 inches at Hurley, 7.5 inches at Viborg, and 7.0 inches at Parker.