Low pressure intensified moving from southeast Colorado on the morning of March 19, into the Great Lakes early on March 20. A strong band of mid-level frontogenesis progressed slowly eastward across the area during the afternoon and evening hours. The system was initially quite warm, resulting in a swath of moderate to heavy rainfall from northeast Nebraska into northwest Iowa. As the system strengthened on the 19th, much colder air was dragged into the frontal band, and precipitation turned quickly from rain to snow from northwest to southeast, and was accompanied by winds gusting 40 to 55 mph. Snowfall was generally from 1 to 5 inches near and south of Interstate 90, with heaviest bands near the Missouri River and again from the Sioux Falls area eastward along Interstate 90.

Winter Weather in DAVISON, SOUTH DAKOTA
From 19-MAR-20 13:00:00 to 19-MAR-20 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall early afternoon on March 19, with visibility briefly to around one-half mile at times between 1400-1700CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 47 mph at Mitchell. Snowfall totaled 1.4 miles at Mitchell.

Winter Weather in HANSON, SOUTH DAKOTA
From 19-MAR-20 14:00:00 to 19-MAR-20 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall early afternoon on March 19, with visibility briefly to around one-half mile at times between 1400-1700CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 49 mph near Alexandria. Snowfall totaled 1.4 miles at Mitchell and 2.0 inches 5 miles northeast of Salem.

Winter Weather in LINCOLN, SOUTH DAKOTA
From 19-MAR-20 15:00:00 to 19-MAR-20 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Rain changed quickly to snowfall late afternoon on March 19, with visibility briefly to one-quarter to one-half mile at times between 1700-2100CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 48 mph at Sioux Falls and 40 mph in Canton. Snowfall totaled near 4 inches in southern Sioux Falls and 4.7 inches at Canton.

Winter Weather in TURNER, SOUTH DAKOTA
From 19-MAR-20 15:00:00 to 19-MAR-20 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall late afternoon on March 19, with visibility briefly to one-quarter to one-half mile at times between 1700-2100CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 49 mph at Freeman and 40 mph in Canton. Snowfall totaled near 3.7 inches at Hurley and 1.9 inches at Marion.

Winter Weather in GREGORY, SOUTH DAKOTA
From 19-MAR-20 12:00:00 to 19-MAR-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall early afternoon on March 19, with visibility briefly to around one-half mile at times between 1300-1600CST. The intense snowfall rate made travel hazardous during the afternoon and early evening as winds increased to a peak of 41 mph at Fairfax and 37 mph at Gregory. Snowfall totaled 5.0 inches at Gregory, 4.5 inches 4 miles south southwest of Pickstown and 4.0 inches 11 miles south southeast of Burke.

Winter Weather in CHARLES MIX, SOUTH DAKOTA
From 19-MAR-20 14:00:00 to 19-MAR-20 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall early afternoon on March 19, with visibility to one-quarter to one-half mile at times between 1500-1800CST. The intense snowfall rate made travel hazardous during the afternoon and early evening as winds increased to a peak of 41 mph at Wagner and 44 mph 10 miles west of Platte. Snowfall totaled 5.3 inches 3 miles south of Dante and at Wagner.

Winter Weather in MCCOOK, SOUTH DAKOTA
From 19-MAR-20 15:00:00 to 19-MAR-20 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall mid-afternoon on March 19, with visibility briefly to one-quarter to one-half mile at times between 1600-1900CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 46 mph near Montrose. Snowfall totaled 2.0 inches 5 miles northeast of Salem and 1.2 inches at Montrose.

Winter Weather in MINNEHAHA, SOUTH DAKOTA
From 19-MAR-20 15:00:00 to 19-MAR-20 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Rain changed quickly to snowfall mid-afternoon on March 19, with visibility briefly to one-quarter to one-half mile at times between 1700-1900CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 48 mph at Sioux Falls. Snowfall totaled 3 to 4 inches inches around Sioux Falls, including 3.2 inches at Joe Foss Field.

Winter Weather in HUTCHINSON, SOUTH DAKOTA
From 19-MAR-20 15:00:00 to 19-MAR-20 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall late afternoon on March 19, with visibility briefly to one-quarter to one-half mile at times between 1600-2000CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 49 mph at Freeman and 47 mph near Tripp. Snowfall totaled near 2.0 inches at Parkston and 1.5 inches at Menno.

Winter Weather in BON HOMME, SOUTH DAKOTA
From 19-MAR-20 15:00:00 to 19-MAR-20 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall mid-afternoon on March 19, with visibility to one-quarter to one-half mile at times between 1600-2000CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 41 mph at Wagner and 43 mph at Tyndall. Snowfall totaled 3.5 inches at Tyndall.

Winter Weather in YANKTON, SOUTH DAKOTA
From 19-MAR-20 16:00:00 to 20-MAR-20 01:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall late afternoon on March 19, with visibility to around one-half mile at times between 1700-2100CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 41 mph at Yankton. Snowfall totaled 2.0 inches at Yankton.

Winter Weather in CLAY, SOUTH DAKOTA
From 19-MAR-20 17:00:00 to 20-MAR-20 01:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall late afternoon on March 19, with visibility to around one-half mile at times between 1700-2100CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 48 mph at Gayville and 47 mph 3 miles south of Beresford. Snowfall totaled 2.2 inches at Vermillion and 2.0 inches 6 miles southeast of Centerville.

Winter Weather in AURORA, SOUTH DAKOTA
From 19-MAR-20 12:00:00 to 19-MAR-20 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall early afternoon on March 19, with visibility briefly to around one-half mile at times between 1400-1600CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 56 mph at White Lake. Snowfall totaled 1.5 inches 4 miles southwest of Stickney and 1.0 inch at White Lake.

Winter Weather in DOUGLAS, SOUTH DAKOTA
From 19-MAR-20 14:00:00 to 19-MAR-20 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall late afternoon on March 19, with visibility briefly to one-quarter to one-half mile at times between 1600-2000CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 47 mph near Tripp and 37 mph at Wagner. Snowfall totaled near 2.0 inches at Parkston and Platte.

Winter Weather in UNION, SOUTH DAKOTA
From 19-MAR-20 17:00:00 to 20-MAR-20 01:00:00 (CST-6)
Crop damage: 0.00K
Reported by: COOP Observer

Rain changed quickly to snowfall late afternoon on March 19, with visibility to around one-half mile at times between 1700-2100CST. The intense snowfall rate made travel hazardous during the late afternoon and early evening as winds increased to a peak of 47 mph 3 miles south of Beresford. Snowfall totaled 2.0 inches 6 miles north northeast of Elk Point.  Around 0735CST on March 20, a northbound bus attempted to change lanes on snow-covered Interstate 29 5 miles south of Elk Point, lost control, and overturned in the east ditch. 11 passengers were (indirectly) injured.