A strong mid-level trough in split flow moved out of the southwestern U.S. on the morning of April 12, and phased with a strong northern stream trough across the northern Plains by April 13. Intense low pressure developed across the central Plains and moved into the Great Lakes, with a strong frontogenetic band of precipitation from Nebraska to Minnesota. Convective instability produced some spotty thunder along with the rain changing to snow.

Winter Storm in LINCOLN, SOUTH DAKOTA
From 12-APR-20 01:00:00 to 12-APR-20 15:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 5.5 inches 1 mile southeast of Tea and 4.5 inches at Canton. Winds near Davis and Canton gusted from 30 to 40 mph, and as high as 45 mph between 0200 and 1100CST, with visibilities less than a mile, and frequently as low as one-half mile.

Winter Storm in AURORA, SOUTH DAKOTA
From 11-APR-20 22:00:00 to 12-APR-20 08:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 9.0 inches 6 miles southeast of Stickney and 5.5 inches 4 miles southwest of Stickney. Winds at Plankinton gusted from 30 to 38 mph at times between 0000CST and 0700CST, with visibilities less than a mile, and occasionally as low as one-quarter mile.

Winter Storm in MOODY, SOUTH DAKOTA
From 12-APR-20 00:00:00 to 12-APR-20 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 10.0 inches 4 miles west northwest of Colman and 3.9 inches at Flandreau. Winds 5 miles west of Ward gusted frequently from 30 to 35 mph, and as high as 40 mph between 0130 and 1000CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.

Winter Storm in TURNER, SOUTH DAKOTA
From 12-APR-20 00:00:00 to 12-APR-20 13:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 7.0 inches 2 miles southwest of Parker and 4.5 inches at Hurley. Winds near Davis and Freeman gusted from 30 to 40 mph, and as high as 45 mph between 0100 and 0900CST, with visibilities less than a mile, and frequently as low as one-half mile.

Winter Storm in DAVISON, SOUTH DAKOTA
From 11-APR-20 23:00:00 to 12-APR-20 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 7.2 inches at Mitchell. Winds at Mitchell gusted from 30 to 40 mph, and as high as 41 mph between 0100 and 0700CST, with visibilities less than a mile, and frequently as low as one-half mile.

Winter Storm in MINER, SOUTH DAKOTA
From 11-APR-20 23:00:00 to 12-APR-20 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 3.9 inches at Howard. Winds near Canova gusted at times to 30 to 35 mph between 0100 and 0900CST, with visibilities less than a mile, and frequently as low as one-half mile.

Winter Weather in JERAULD, SOUTH DAKOTA
From 11-APR-20 21:00:00 to 12-APR-20 06:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 3.0 inches at Wessington Springs, with winds gusting as high as 35 mph between 2200CST and 0600CST, with visibilities less than a mile, and briefly as low as one-quarter to one-half mile.

Winter Weather in BEADLE, SOUTH DAKOTA
From 11-APR-20 21:00:00 to 12-APR-20 07:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 2.8 inches at Huron and 2.0 inches 2 miles southeast of Wessington. Winds at Huron gusted as high as 32 mph between 2300CST and 0600CST, with visibilities around one mile, and briefly as low as one-half mile.

Winter Weather in KINGSBURY, SOUTH DAKOTA
From 11-APR-20 23:00:00 to 12-APR-20 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 2.0 inches at De Smet. Winds near Arlington and Cavour occasionally gusted to 30 to 40 mph between 0100CST and 0800CST, with visibilities around one mile, and briefly as low as one-half mile.

Winter Storm in LAKE, SOUTH DAKOTA
From 12-APR-20 00:00:00 to 12-APR-20 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 7.2 inches 2 miles north of Chester. Winds at Madison gusted frequently from 30 to 35 mph, and as high as 38 mph between 0130 and 1000CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.

Winter Storm in MINNEHAHA, SOUTH DAKOTA
From 12-APR-20 00:00:00 to 12-APR-20 15:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snowfall totaled 6.9 inches on the southeast side of Sioux Falls, 6.3 inches 2 miles west southwest of Garretson, 5.8 inches 4 miles northwest of Renner, and 5.6 inches at NWS Sioux Falls. Winds at Sioux Falls gusted frequently from 30 to 40 mph, and as high as 41 mph between 0500 and 1230CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.

Winter Storm in HANSON, SOUTH DAKOTA
From 11-APR-20 23:00:00 to 12-APR-20 10:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 7.2 inches at Mitchell and 4.0 inches in Bridgewater. Winds at Alexandria gusted from 30 to 40 mph, and as high as 41 mph between 0100 and 0800CST, with visibilities less than a mile, and frequently as low as one-half mile.

Winter Storm in YANKTON, SOUTH DAKOTA
From 12-APR-20 04:00:00 to 12-APR-20 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 6.3 inches 5 miles east of Yankton and 6.0 inches at Yankton. Winds at Yankton gusted as high as 40 mph between 0700CST and 1230CST, with visibilities frequently at one-half mile or less, and occasionally as low as one-quarter mile.

Winter Storm in GREGORY, SOUTH DAKOTA
From 11-APR-20 20:00:00 to 12-APR-20 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 9.0 inches 9 miles south of Dallas and 9 miles north of Gregory, 6.5 inches at Gregory and 6.0 inches 2 miles northeast of Burke. Winds at Gregory and Fairfax gusted frequently up to 33 mph between 2000CST April 11 and 0630CST April 12, with visibility generally less than one mile.

Winter Storm in BRULE, SOUTH DAKOTA
From 11-APR-20 21:00:00 to 12-APR-20 08:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 6.2 inches 5 miles south of Chamberlain.  Winds at Kimball gusted frequently up to 38 mph between 0030CST and 0630CST.

Winter Storm in DOUGLAS, SOUTH DAKOTA
From 11-APR-20 22:00:00 to 12-APR-20 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 5.0 inches 5 miles west of Armour. Winds at Plankinton and Wagner gusted from 30 to 38 mph at times between 0000CST and 0700CST, with visibilities less than a mile, and occasionally as low as one-quarter mile.

Winter Storm in BON HOMME, SOUTH DAKOTA
From 12-APR-20 02:00:00 to 12-APR-20 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 4.4 inches at Tyndall, where winds reached a peak of 44 mph. Visibility was frequently one-quarter to one-half mile from 0600-1000CST.

Winter Storm in UNION, SOUTH DAKOTA
From 12-APR-20 04:00:00 to 12-APR-20 15:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 4.5 inches 6 miles north northeast of Elk Point. Winds 2 miles south of Beresford gusted from 30 to 40 mph at times between 0400 and 1330CST, with visibilities frequently at one-half mile or less, and occasionally as low as one-quarter mile.

Winter Storm in HUTCHINSON, SOUTH DAKOTA
From 11-APR-20 23:00:00 to 12-APR-20 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 6.0 inches at Parkston and 5.0 inches in Menno. Winds at Tripp and Freeman gusted from 30 to 40 mph, and as high as 44 mph between 0100 and 1000CST, with visibilities less than a mile, and frequently as low as one-half mile.

Winter Storm in SANBORN, SOUTH DAKOTA
From 11-APR-20 23:00:00 to 12-APR-20 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 4.0 inches 4 miles north northeast of Forestburg. Winds near Forestburg gusted frequently from 30 to 40 mph, and as high as 45 mph between 0100 and 0830CST, with visibilities less than a mile, and frequently as low as one-half mile.

Winter Weather in BROOKINGS, SOUTH DAKOTA
From 12-APR-20 00:00:00 to 12-APR-20 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 2.5 inches at Brookings, and winds which occasionally gusted to 30 to 35 mph between 0100CST and 0800CST resulted in frequent visibilities around one mile,  briefly as low as one-half mile.

Winter Storm in MCCOOK, SOUTH DAKOTA
From 12-APR-20 00:00:00 to 12-APR-20 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 5.0 inches 5 miles northeast of Salem and 6 miles northwest of Montrose. Winds at Montrose gusted frequently from 35 to 45 mph, and as high as 47 mph between 0100 and 1000CST, with visibilities less than a mile, and frequently as low as one-quarter to one-half mile.

Winter Storm in CLAY, SOUTH DAKOTA
From 12-APR-20 04:00:00 to 12-APR-20 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 7.2 inches at Vermillion. Winds near Gayville gusted from 35 to 45 mph at times between 0700CST and 1330CST, with visibilities frequently at one-half mile or less, and occasionally as low as one-quarter mile.

Winter Storm in CHARLES MIX, SOUTH DAKOTA
From 12-APR-20 00:00:00 to 12-APR-20 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totaled 6.1 inches 3 miles south of Dante and 5.8 inches at Wagner. Winds at Wagner gusted frequently to 30 to 35 mph between 0000CST and 0900CST, with visibilities less than a mile, and occasionally as low as one-quarter mile.