A large slow-moving area of low pressure wandered from Colorado to eastern South Dakota over a two-day period. Precipitation circulated back into southeast South Dakota, which started as a period of rainfall during the morning and early afternoon on March 14.  The rain changed to snow most quickly in south central SD by midday, and slowest toward Interstate 29 which occurred during the evening. Snow became heavy at times during the later evening and overnight, with snowfall rates up to 2 inches per hour.

Winter Weather in BON HOMME, SOUTH DAKOTA
From 14-MAR-21 18:00:00 to 15-MAR-21 07:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 4.0 inches at Tyndall and 8 miles west northwest of Springfield. Travel become hazardous as snow rates increased at night.

Winter Weather in YANKTON, SOUTH DAKOTA
From 14-MAR-21 20:00:00 to 15-MAR-21 06:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 2.0 inches at Yankton. Travel become hazardous as snow rates increased at night.

Winter Weather in CLAY, SOUTH DAKOTA
From 14-MAR-21 21:00:00 to 15-MAR-21 05:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 2.5 inches 6 miles southeast of Centerville and 2.3 inches at Vermillion. Travel become hazardous as snow rates increased at night.

Winter Weather in UNION, SOUTH DAKOTA
From 14-MAR-21 22:00:00 to 15-MAR-21 06:00:00 (CST-6)
Reported by: CoCoRaHS

Snowfall totaled 3.5 inches 6 miles north northeast of Elk Point. Travel become hazardous as snow rates increased at night.

Winter Storm in MCCOOK, SOUTH DAKOTA
From 14-MAR-21 20:00:00 to 15-MAR-21 06:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was heavy at times between 2300CST on March 14 and 0400CST on March 15, resulting in very hazardous travel conditions. Totals of 6.5 inches at Montrose and 6.0 inches at Bridgewater were recorded.

Winter Storm in BRULE, SOUTH DAKOTA
From 14-MAR-21 13:00:00 to 15-MAR-21 09:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was heavy at times between 1700-2300CST on March 14, resulting in very hazardous travel conditions. Totals of 7.2 inches 5 miles south southeast of Chamberlain and 6.5 inches 2 miles south of Pukwana were recorded.

Winter Storm in CHARLES MIX, SOUTH DAKOTA
From 14-MAR-21 15:00:00 to 15-MAR-21 08:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was heavy at times between 1900CST on March 14 and 0200CST on March 15, resulting in very hazardous travel conditions. Totals of 6.0 inches at Platte and 2 miles northeast of Academy were recorded.

Winter Storm in AURORA, SOUTH DAKOTA
From 14-MAR-21 16:00:00 to 15-MAR-21 07:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was heavy at times between 1900CST on March 14 and 0200CST on March 15, resulting in very hazardous travel conditions. A total of 7.0 inches at Plankinton was recorded.

Winter Storm in DOUGLAS, SOUTH DAKOTA
From 14-MAR-21 16:00:00 to 15-MAR-21 07:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was heavy at times between 1900CST on March 14 and 0200CST on March 15, resulting in very hazardous travel conditions. Totals of 9.0 inches 10 miles west of Dimock and 7.0 inches 5 miles west of Armour were recorded.

Winter Storm in GREGORY, SOUTH DAKOTA
From 14-MAR-21 12:00:00 to 15-MAR-21 09:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was heavy at times between 1600-2300CST on March 14, resulting in very hazardous travel conditions. Totals of 11.0 inches 9 miles north of Gregory and 11 miles south southeast of Burke, 10.5 inches at Bonesteel and 9 inches 4 miles south southwest of Pickstown were recorded.

Winter Storm in BROOKINGS, SOUTH DAKOTA
From 14-MAR-21 21:00:00 to 15-MAR-21 05:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was heavy at times between 2300CST on March 14 and 0400CST on March 15, resulting in very hazardous travel conditions. Totals of 12.7 inches at Brookings, 9.0 inches at Volga and 7.0 inches at White were recorded.

Winter Storm in HUTCHINSON, SOUTH DAKOTA
From 14-MAR-21 19:00:00 to 15-MAR-21 06:00:00 (CST-6)
Reported by: CoCoRaHS

Snowfall was heavy at times between 2200CST on March 14 and 0300CST on March 15, resulting in very hazardous travel conditions. A total of 6.0 inches at Parkston was recorded.

Winter Storm in DAVISON, SOUTH DAKOTA
From 14-MAR-21 18:00:00 to 15-MAR-21 06:00:00 (CST-6)
Reported by: CoCoRaHS

Snowfall was heavy at times between 2000CST on March 14 and 0200CST on March 15, resulting in very hazardous travel conditions. Totals of 6.6 inches 7 miles south of Mitchell and 6.1 inches at Mitchell were recorded.

Winter Storm in JERAULD, SOUTH DAKOTA
From 14-MAR-21 16:00:00 to 15-MAR-21 07:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was heavy at times between 2000CST on March 14 and 0200CST on March 15, resulting in very hazardous travel conditions. A total of 6.0 inches at Wessington Springs was recorded.

Winter Weather in SANBORN, SOUTH DAKOTA
From 14-MAR-21 18:00:00 to 15-MAR-21 06:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 4.8 inches at Woonsocket. Travel become hazardous as snow rates increased at night.

Winter Storm in MINNEHAHA, SOUTH DAKOTA
From 14-MAR-21 21:00:00 to 15-MAR-21 07:00:00 (CST-6)
Reported by: Official NWS Observations

Snowfall was heavy at times between 2300CST on March 14 and 0400CST on March 15, resulting in very hazardous travel conditions. Totals of 7.5 inches at Colton and 4 miles northwest of Renner, 6.5 to 7.5 inches across the Sioux Falls metro, and 7.0 inches at Brandon were recorded.

Winter Storm in MOODY, SOUTH DAKOTA
From 14-MAR-21 21:00:00 to 15-MAR-21 07:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was heavy at times between 2300CST on March 14 and 0400CST on March 15, resulting in very hazardous travel conditions. Totals of 7.0 inches 11 miles north of Colman and 6.2 inches at Flandreau were recorded.

Winter Storm in LINCOLN, SOUTH DAKOTA
From 14-MAR-21 20:00:00 to 15-MAR-21 06:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was heavy at times between 2300CST on March 14 and 0400CST on March 15, resulting in very hazardous travel conditions. Totals of 7.5 inches 1 mile southeast of Tea, 6.5 inches on the south side of Sioux Falls and 6.0 inches at Canton were recorded.

Winter Weather in MINER, SOUTH DAKOTA
From 14-MAR-21 20:00:00 to 15-MAR-21 06:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 3.7 inches at Howard. Travel become hazardous as snow rates increased at night.

Winter Storm in LAKE, SOUTH DAKOTA
From 14-MAR-21 21:00:00 to 15-MAR-21 07:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was heavy at times between 2300CST on March 14 and 0400CST on March 15, resulting in very hazardous travel conditions. Totals of 8.5 inches at Madison and 7.2 inches 2 miles north of Chester were recorded.

Winter Storm in KINGSBURY, SOUTH DAKOTA
From 14-MAR-21 20:00:00 to 15-MAR-21 05:00:00 (CST-6)
Reported by: COOP Observer

Snowfall was heavy at times between 2300CST on March 14 and 0300CST on March 15, resulting in very hazardous travel conditions. Totals of 9.0 inches at Lake Preston and 6.8 inches at De Smet were recorded.

Winter Weather in BEADLE, SOUTH DAKOTA
From 14-MAR-21 19:00:00 to 15-MAR-21 06:00:00 (CST-6)
Reported by: Official NWS Observations

Snowfall totaled 5.0 inches 2 miles southeast of Wessington and 4.7 inches at Huron. Travel become hazardous as snow rates increased at night.

Winter Weather in HANSON, SOUTH DAKOTA
From 14-MAR-21 19:00:00 to 15-MAR-21 06:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 2.5 inches at Alexandria. Travel become hazardous as snow rates increased at night.

Winter Weather in TURNER, SOUTH DAKOTA
From 14-MAR-21 20:00:00 to 15-MAR-21 06:00:00 (CST-6)
Reported by: COOP Observer

Snowfall totaled 4.5 inches at Hurley and 3.5 inches 5 miles north northwest of Marion. Travel become hazardous as snow rates increased at night.