Frontogenetic forcing in advance of a strong cold push produced widespread snowfall  across south central, southeast and east central South Dakota.  Heaviest snowfall amounts straddled Interstate 90, with a brief period of freezing drizzle in far southeast South Dakota preceding snowfall.

Winter Weather in BRULE, SOUTH DAKOTA
From 21-DEC-17 04:00:00 to 21-DEC-17 13:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall of 3 to 5 inches during the morning and early afternoon, including 4.1 inches 5 miles south of Chamberlain, produced hazardous road conditions.

Winter Weather in AURORA, SOUTH DAKOTA
From 21-DEC-17 04:00:00 to 21-DEC-17 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall from 3 to 5 inches during the morning and early afternoon, including 5.0 inches at White Lake, produced hazardous road conditions.

Winter Weather in SANBORN, SOUTH DAKOTA
From 21-DEC-17 06:30:00 to 21-DEC-17 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall from 2 to 4 inches during the morning and early afternoon, including 3.0 inches at Woonsocket, produced hazardous road conditions.

Winter Weather in GREGORY, SOUTH DAKOTA
From 21-DEC-17 04:00:00 to 21-DEC-17 17:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall from 3 to 5 inches during the morning and early afternoon, including 5.0 inches 9 miles north of Gregory, produced hazardous road conditions. Visibility was briefly as low as 1/4 to 1/2 mile between 0900CST and 1100CST.

Winter Weather in CHARLES MIX, SOUTH DAKOTA
From 21-DEC-17 04:30:00 to 21-DEC-17 17:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall from 2 to 5 inches from mid-morning to mid-afternoon, including 3.0 inches 2 miles northeast of Academy and 4.0 inches at Platte, produced hazardous road conditions.

Winter Weather in DOUGLAS, SOUTH DAKOTA
From 21-DEC-17 05:00:00 to 21-DEC-17 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall from 2 to 4 inches during the morning and early afternoon, including 3.2 inches 10 miles west of Dimock, produced hazardous road conditions.

Winter Weather in DAVISON, SOUTH DAKOTA
From 21-DEC-17 05:30:00 to 21-DEC-17 15:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snowfall from 2 to 5 inches during the morning and early afternoon, including 5.0 inches at Mitchell, produced hazardous road conditions.

Winter Weather in HANSON, SOUTH DAKOTA
From 21-DEC-17 06:00:00 to 21-DEC-17 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall from 3 to 5 inches during the morning and early afternoon, including 4.5 inches at Alexandria, produced hazardous road conditions.

Winter Weather in MINER, SOUTH DAKOTA
From 21-DEC-17 06:00:00 to 21-DEC-17 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall from 2 to 4 inches during the morning and early afternoon, including 3.0 inches at Howard, produced hazardous road conditions.

Winter Weather in LAKE, SOUTH DAKOTA
From 21-DEC-17 06:00:00 to 21-DEC-17 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall from 3 to 4 inches during the morning and early afternoon, including 3.8 inches 2 miles north of Chester and 3.0 inches at Madison, produced hazardous road conditions. Visibility briefly dropped to 1/4 to 1/2 mile from 0800CST to 0930CST.

Winter Weather in MOODY, SOUTH DAKOTA
From 21-DEC-17 06:00:00 to 21-DEC-17 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall from 3 to 5 inches during the morning and early afternoon, including 3.9 inches at Flandreau, produced hazardous road conditions.

Winter Weather in MCCOOK, SOUTH DAKOTA
From 21-DEC-17 08:00:00 to 21-DEC-17 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall from 3 to 5 inches during the morning and early afternoon, including 4.0 inches at Montrose and 5 miles NE of Salem, produced hazardous road conditions.

Winter Weather in HUTCHINSON, SOUTH DAKOTA
From 21-DEC-17 07:00:00 to 21-DEC-17 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall from 2 to 3 inches during the late morning and afternoon, including 2.2 inches at Menno, produced hazardous road conditions.

Winter Weather in MINNEHAHA, SOUTH DAKOTA
From 21-DEC-17 09:00:00 to 21-DEC-17 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snowfall from 3 to 5 inches during the late morning and afternoon, including 4.3 inches at Sioux Falls, produced hazardous road conditions.

Winter Weather in BON HOMME, SOUTH DAKOTA
From 21-DEC-17 10:00:00 to 21-DEC-17 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall up to 2 inches from the late morning to early evening, including 0.7 inches at Tyndall, produced hazardous road conditions.

Winter Weather in YANKTON, SOUTH DAKOTA
From 21-DEC-17 11:00:00 to 21-DEC-17 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall of 1 to 3 inches occurred from the late morning to early evening, including 2.0 inches at 2 miles SE of Yankton.  The snow was preceded by a brief period of freezing drizzle, contributing to hazardous road conditions.

Winter Weather in TURNER, SOUTH DAKOTA
From 21-DEC-17 08:00:00 to 21-DEC-17 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall of 1 to 3 inches occurred from the late morning to early evening, including 2.0 inches at Hurley.  The snow was preceded by a brief period of freezing drizzle, contributing to hazardous road conditions.

Winter Weather in CLAY, SOUTH DAKOTA
From 21-DEC-17 11:00:00 to 21-DEC-17 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall of 1 to 2 inches occurred during the afternoon and early evening, including 1.5 inches at Vermillion.  The snow was preceded by a brief period of freezing drizzle, contributing to hazardous road conditions.

Winter Weather in UNION, SOUTH DAKOTA
From 21-DEC-17 11:00:00 to 21-DEC-17 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A period of freezing drizzle produced a glaze on roadways prior to a light snowfall through the early evening, contributing to hazardous road conditions.  Snowfall accumulated one to two inches, an inch measured 5.6 miles NNE of Elk Point.

Winter Weather in LINCOLN, SOUTH DAKOTA
From 21-DEC-17 10:00:00 to 21-DEC-17 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A period of freezing drizzle late morning produced a glaze on roadways prior to a light snowfall lasting into the early evening, contributing to hazardous road conditions. Two (indirect) fatalities occurred 8 miles north of Beresford on Interstate 29 when a northbound pickup lost control, rolled through the median, and came to rest on a southbound car in the other lanes. Snowfall accumulated to one to three inches, 2.9 inches in southern Sioux Falls.