A very strong cold front was accompanied by a narrow band of moderate to heavy snowfall, as well as wind gusting to 30 to 45 mph.  Most areas saw a brief period of rain, freezing rain or sleet before changing to snow, which was accompanied by a temperature fall of 10 to 20 degrees over a six hour period.  Contraction of the band occurred due to strong elevated instability, with isolated thunder occurring in southeast South Dakota and southwest Minnesota.  While most areas received around an inch or two of snowfall, the band peaked in intensity around the Sioux Falls area with up to three to five inches.

Winter Weather in GREGORY, SOUTH DAKOTA
From 03-FEB-21 21:00:00 to 04-FEB-21 02:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was briefly heavy and totaled 2.1 inches 4 miles south southwest of Pickstown.  Roads became hazardous, and frequent wind gusts as high as 37 mph at Fairfax produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in CHARLES MIX, SOUTH DAKOTA
From 03-FEB-21 22:00:00 to 04-FEB-21 03:00:00 (CST-6)
Reported by: CoCoRaHS

Snowfall was briefly heavy and totaled 3.1 inches near Wagner and 2.8 inches 4 miles south of Dante.  Roads became hazardous, and frequent wind gusts as high as 37 mph 5 miles west of Geddes produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in BON HOMME, SOUTH DAKOTA
From 03-FEB-21 23:00:00 to 04-FEB-21 04:00:00 (CST-6)
Reported by: CoCoRaHS

Snowfall was briefly heavy and totaled 2.0 inches 8 miles west northwest of Springfield.  Roads became hazardous, and frequent wind gusts as high as 44 mph near Tyndall produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in HUTCHINSON, SOUTH DAKOTA
From 03-FEB-21 22:00:00 to 04-FEB-21 04:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was briefly heavy and totaled 3.0 inches at Menno.  Roads became hazardous, and frequent wind gusts as high as 44 mph near Freeman produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in MCCOOK, SOUTH DAKOTA
From 03-FEB-21 22:00:00 to 04-FEB-21 07:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was briefly heavy and totaled 2.3 inches at Montrose.  Roads became hazardous, and frequent wind gusts as high as 43 mph near Montrose produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in YANKTON, SOUTH DAKOTA
From 03-FEB-21 23:00:00 to 04-FEB-21 06:00:00 (CST-6)
Reported by: CoCoRaHS

Snowfall was briefly heavy and totaled 2.0 inches at Yankton.  Roads became hazardous, and frequent wind gusts as high as 39 mph at Yankton produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in CLAY, SOUTH DAKOTA
From 04-FEB-21 00:00:00 to 04-FEB-21 07:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was briefly heavy and totaled 2.5 inches at Vermillion.  Roads became hazardous, and frequent wind gusts as high as 43 mph near Gayville produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in UNION, SOUTH DAKOTA
From 04-FEB-21 01:00:00 to 04-FEB-21 08:00:00 (CST-6)
Reported by: CoCoRaHS

Snowfall was briefly heavy and totaled 2.0 inches 6 miles north northeast of Elk Point.  Roads became hazardous, and frequent wind gusts as high as 43 mph 3 miles south of Beresford produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in TURNER, SOUTH DAKOTA
From 03-FEB-21 23:00:00 to 04-FEB-21 07:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was briefly heavy and totaled 3.6 inches at Marion and 2.4 inches at Hurley. Roads became hazardous, and frequent wind gusts as high as 44 mph near Freeman produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in MINNEHAHA, SOUTH DAKOTA
From 03-FEB-21 22:30:00 to 04-FEB-21 09:00:00 (CST-6)
Reported by: Official NWS Observations

Snowfall was briefly heavy and with several reports of 3 to 5 inches around the Sioux Falls metro area, 4.0 inches 6 miles south of Hartford, and 3.5 inches near Garretson. Roads became treacherous, and frequent wind gusts as high as 39 mph at Sioux Falls resulted in several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in MOODY, SOUTH DAKOTA
From 03-FEB-21 22:00:00 to 04-FEB-21 10:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was briefly heavy and totaled 1.9 inches at Flandreau.  Roads became hazardous, and frequent wind gusts as high as 41 mph 13 miles west of Ward produced several hours of blowing snow with visibility as low as one-half mile.

Winter Weather in LINCOLN, SOUTH DAKOTA
From 03-FEB-21 23:00:00 to 04-FEB-21 09:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was briefly heavy and totaled 3.8 inches on the south side of Sioux Falls and 2.0 inches at Canton. Roads became hazardous, and frequent wind gusts as high as 44 mph near Davis and 39 mph at Sioux Falls resulted in several hours of blowing snow with visibility as low as one-half mile.