A strong upper level wave lifted northeast from the Texas Panhandle early on March 9, reaching the western Great Lakes as an intense closed low.  This system included a leading surge of warm air, allowing precipitation to become rain or light freezing rain over a large area, with many locations receiving a few hundredths to two tenths of an inch ice accumulation before colder air wrapped in behind and transitioned precipitation to snowfall.  Brief periods of heavier snowfall due to marginally unstable air off the surface led to accumulations of 2 to 6 inches north of Interstate 90 along with travel disruptions, with generally a trace to 2 inches south; the exception being parts of northwest Iowa which received 2 to 4 inches.  As the surface low pressure moved across Iowa by later in the afternoon and evening of March 9, northwest winds increased to a gusty 30 to 45 mph.

Winter Weather in DOUGLAS, SOUTH DAKOTA
From 09-MAR-19 02:00:00 to 09-MAR-19 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

After a brief period of freezing rain from 0400-0700CST which resulted in a light glaze of icing, snowfall developed with accumulations up to 1.5 inches near Platte. Winds increased as the snow tapered off, gusting as high as 45 mph near Wagner.

Winter Weather in MCCOOK, SOUTH DAKOTA
From 09-MAR-19 04:00:00 to 09-MAR-19 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

After a brief period of freezing rain from 0400-0700CST which resulted in up to a tenth of an inch of icing, snowfall developed with accumulations up to 1.5 inches 5 miles northeast of Salem. Winds increased as the snow tapered off, gusting as high as 46 mph at Mitchell and 43 mph at Sioux Falls.

Winter Weather in BRULE, SOUTH DAKOTA
From 09-MAR-19 02:00:00 to 09-MAR-19 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

After a brief period of freezing rain from 0400-0700CST which resulted in a light glaze of icing, snowfall developed with accumulations up to 3.0 inches 5 miles south of Chamberlain and 2.0 inches near Pukwana. Winds increased as the snow tapered off, gusting as high as 36 mph at Chamberlain.  Snow drifting across Interstate 90 created treacherous driving conditions and the roadway was closed from 1700CST March 9 until early the next morning.

Winter Weather in AURORA, SOUTH DAKOTA
From 09-MAR-19 02:00:00 to 09-MAR-19 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

After a brief period of freezing rain from 0400-0700CST which resulted in a light glaze of icing, snowfall developed with accumulations up to 0.9 inches at White Lake. Winds increased as the snow tapered off, gusting as high as 43 mph at White Lake.  Snow drifting across Interstate 90 created treacherous driving conditions and the roadway was closed from 1700CST March 9 until early the next morning.

Winter Weather in DAVISON, SOUTH DAKOTA
From 09-MAR-19 03:00:00 to 09-MAR-19 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

After a brief period of freezing rain from 0400-0700CST which resulted in a light glaze of icing, snowfall developed with accumulations up to 2.6 inches at Mitchell. Winds increased as the snow tapered off, gusting as high as 46 mph at Mitchell.  Snow drifting across Interstate 90 created treacherous driving conditions and the roadway was closed from 1700CST March 9 until early the next morning.

Winter Weather in HANSON, SOUTH DAKOTA
From 09-MAR-19 03:00:00 to 09-MAR-19 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

After a brief period of freezing rain from 0400-0700CST which resulted in up to a tenth of an inch of icing, snowfall developed with accumulations up to 1.5 inches near Alexandria. Winds increased as the snow tapered off, gusting as high as 46 mph at Mitchell.

Winter Weather in LINCOLN, SOUTH DAKOTA
From 09-MAR-19 04:00:00 to 09-MAR-19 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

After a brief period of freezing rain from 0400-0700CST which resulted in up to a tenth of an inch of icing, precipitation changed to rainfall early morning which was briefly heavy and produced some urban flooding. Cooler air changed rain to snowfall, with accumulations up to 2.0 inches at Canton. Winds increased as the snow tapered off, gusting as high as 43 mph at Sioux Falls and 38 mph at Canton.

Winter Weather in GREGORY, SOUTH DAKOTA
From 09-MAR-19 02:00:00 to 09-MAR-19 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

After a brief period of freezing rain from 0400-0700CST which resulted in a light glaze of icing, snowfall developed with accumulations up to 3.5 inches near Gregory and 2.0 inches 5 miles southwest of Burke. Winds increased as the snow tapered off, gusting as high as 43 mph at Gregory and 38 mph near Fairfax.

Winter Weather in CHARLES MIX, SOUTH DAKOTA
From 09-MAR-19 02:00:00 to 09-MAR-19 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

After a brief period of freezing rain from 0400-0700CST which resulted in a light glaze of icing, snowfall developed with accumulations up to 1.5 inches near Platte. Winds increased as the snow tapered off, gusting as high as 45 mph near Wagner.

Winter Weather in MINNEHAHA, SOUTH DAKOTA
From 09-MAR-19 04:00:00 to 09-MAR-19 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

After a brief period of freezing rain from 0400-0700CST which resulted in up to a tenth of an inch of icing, precipitation changed to rainfall early morning which was briefly heavy and produced some urban flooding. Cooler air changed rain to snowfall, with accumulations up to 2.8 inches near Garretson and from 2 to 3 inches around Sioux Falls. Winds increased as the snow tapered off, gusting as high as 43 mph at Sioux Falls.  A sheriff's deputy and driver of another car were indirectly injured when his vehicle was struck by another while stopped to aid at a separate non-injury accident around 0600CST along Interstate 90 near Sioux Falls. The accidents were a result of ice accumulation on roadways.

Winter Weather in MINER, SOUTH DAKOTA
From 09-MAR-19 04:00:00 to 09-MAR-19 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

After a brief period of freezing rain from 0400-0700CST which resulted in up to a tenth of an inch of icing, snowfall developed with accumulations up to 0.5 inch at Howard. Winds increased as the snow tapered off, gusting as high as 36 mph at Madison and 46 mph at Mitchell.

Winter Weather in LAKE, SOUTH DAKOTA
From 09-MAR-19 04:00:00 to 09-MAR-19 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

After a brief period of freezing rain from 0400-0700CST which resulted in up to a tenth of an inch of icing, snowfall developed with accumulations up to 3.4 inches 2 miles north of Chester and 2.4 inches at Madison. Winds increased as the snow tapered off, gusting as high as 36 mph at Madison.

Winter Storm in MOODY, SOUTH DAKOTA
From 09-MAR-19 04:00:00 to 09-MAR-19 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A brief period of freezing rain from 0400-0700CST brought up to two tenths of an inch ice accumulation.  Snowfall followed with visibility occasionally reduced to 1/4 to 1/2 mile between 1100-1500CST, with total accumulations of 3.2 inches 11 miles north of Colman and 2.7 inches at Flandreau.

Winter Weather in BEADLE, SOUTH DAKOTA
From 09-MAR-19 04:00:00 to 09-MAR-19 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

After a brief period of freezing rain from 0400-0700CST which resulted in a light glaze of icing, snowfall developed with accumulations up to 3.0 inches 2 miles south southeast of Wessington and 2.0 inches at Huron.  Winds increased as the snow tapered off, gusting as high as 44 mph at the Huron Regional Airport.

Winter Weather in JERAULD, SOUTH DAKOTA
From 09-MAR-19 04:00:00 to 09-MAR-19 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

After a brief period of freezing rain from 0400-0700CST which resulted in a light glaze of icing, snowfall developed with accumulations up to 4.0 inches at Wessington Springs. Winds increased as the snow tapered off, gusting as high as 36 mph 10 miles south southwest of Wessington.

Winter Weather in SANBORN, SOUTH DAKOTA
From 09-MAR-19 04:00:00 to 09-MAR-19 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

After a brief period of freezing rain from 0400-0700CST which resulted in a light glaze of icing, snowfall developed with accumulations up to 3.0 inches 4 miles north northeast of Forestburg. Winds increased as the snow tapered off, gusting as high as 44 mph at Huron and 46 mph at Mitchell.

Winter Storm in KINGSBURY, SOUTH DAKOTA
From 09-MAR-19 04:00:00 to 09-MAR-19 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A brief period of freezing rain from 0400-0700CST brought up to a tenth of an inch ice accumulation.  Snowfall followed with visibility occasionally reduced to 1/4 to 1/2 mile between 0900-1400, with total accumulations of 4.0 inches at De Smet and 3.0 inches 9 miles south southwest of Arlington.

Winter Storm in BROOKINGS, SOUTH DAKOTA
From 09-MAR-19 04:00:00 to 09-MAR-19 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A brief period of freezing rain from 0400-0700CST brought up to a tenth of an inch ice accumulation.  Snowfall followed with visibility occasionally reduced to 1/4 to 1/2 mile between 0900-1400, with total accumulations of 6.0 inches 2 miles south southeast of Astoria, 5.0 inches at White and Brookings, and 4.7 inches 5 miles west of Bruce.