A strong upper level jet pushing across the Rockies resulted in development of low pressure across southeast Colorado late on April 2, which intensified rapidly moving across Kansas and into Illinois on April 3. A broad swath of snow and gusty winds developed north of the low track across the area, with heaviest snowfall amounts in excess of 6 inches generally corresponding to highest terrain areas in south central and southeast South Dakota, northern portions of northwest Iowa and areas of southwest Minnesota. As unseasonably cold high pressure spread in behind the system on the morning of April 4, a few low temperature records were broken by as much as 5 to 15 degrees.

Winter Weather in DAVISON, SOUTH DAKOTA
From 02-APR-18 23:00:00 to 03-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A period of more intense snowfall developed in the morning hours of April 3, continuing at times into early afternoon. Winds shifted northwest and increased substantially with gusts of 30 to 40 mph at times through the late morning and afternoon, lowering visibility under a mile at times 0800-1300CST. Snowfall totaled 1.3 inches at Mitchell.

Winter Weather in SANBORN, SOUTH DAKOTA
From 02-APR-18 22:00:00 to 03-APR-18 15:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the early morning hours of April 3, continuing at times into late morning. Winds shifted northwest and increased substantially with gusts of 30 to 35 mph at times through the late morning and early afternoon, lowering visibility under a mile at times 0700-1300CST. Snowfall totaled 2.0 inches 4 miles north northeast of Forestburg.

Winter Weather in UNION, SOUTH DAKOTA
From 03-APR-18 00:00:00 to 03-APR-18 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A period of more intense snowfall developed in the early morning hours of April 3, continuing at times through the afternoon. Winds shifted northwest and increased substantially with gusts of 30 to 35 mph at times through the late morning and afternoon, lowering visibility under a mile at times 0800-1300CST. Snowfall totaled 3.8 inches 6 miles north northeast of Elk Point.

Winter Weather in DOUGLAS, SOUTH DAKOTA
From 02-APR-18 23:00:00 to 03-APR-18 15:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A period of more intense snowfall developed in the early morning hours of April 3, continuing at times into early afternoon. Winds shifted northwest and increased substantially with gusts of 30 to 40 mph at times through the late morning and afternoon, lowering visibility under a mile at times 0800-1300CST. Snowfall totaled 4.0 inches 4 miles west of Armour.

Winter Weather in HANSON, SOUTH DAKOTA
From 02-APR-18 23:00:00 to 03-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the early morning of April 3, continuing at times into early afternoon. Winds shifted northwest and increased substantially with gusts of 30 to 40 mph at times through the late morning and afternoon, lowering visibility under a mile at times 0800-1400CST. Snowfall totaled 2.5 inches at Alexandria.

Winter Weather in AURORA, SOUTH DAKOTA
From 02-APR-18 22:00:00 to 03-APR-18 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall developed in the predawn hours of April 3, continuing at times into early afternoon. Winds shifted northwest and increased substantially with gusts of 30 to 40 mph at times through mid afternoon, lowering visibility under a mile at times. Snowfall totaled 1.5 inches at White Lake.

Winter Weather in BEADLE, SOUTH DAKOTA
From 02-APR-18 22:00:00 to 03-APR-18 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the predawn hours of April 3, continuing at times into early afternoon. Winds shifted northwest and increased substantially with gusts of 30 to 40 mph at times through the afternoon, lowering visibility under a mile at times 0700-1200CST. Snowfall totaled 4.0 inches 2 miles southeast of Wessington and 1.7 inches at Huron.

Winter Weather in HUTCHINSON, SOUTH DAKOTA
From 02-APR-18 23:00:00 to 03-APR-18 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the early morning of April 3, continuing at times into early afternoon. Winds shifted northwest and increased substantially with gusts of 30 to 40 mph at times through the late morning and afternoon, lowering visibility under a mile at times 0800-1400CST. Snowfall totaled 3.5 inches at Menno, 3.0 inches at Parkston and 2.5 inches 11 miles south of Emery.

Winter Weather in JERAULD, SOUTH DAKOTA
From 02-APR-18 22:00:00 to 03-APR-18 13:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the predawn hours of April 3, continuing at times into late morning. Winds shifted northwest and increased substantially with gusts of 30 to 35 mph at times through the morning and early afternoon, lowering visibility under a mile at times 0700-1100CST. Snowfall totaled 2.0 inches at Wessington Springs.

Winter Weather in MINER, SOUTH DAKOTA
From 02-APR-18 23:00:00 to 03-APR-18 15:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the predawn hours of April 3, continuing at times into late morning. Winds shifted northwest and increased substantially with gusts of 30 to 35 mph at times through the morning and early afternoon, lowering visibility under a mile at times 0800-1300CST. Snowfall totaled 2.5 inches at Howard.

Winter Weather in MOODY, SOUTH DAKOTA
From 02-APR-18 23:00:00 to 03-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the predawn hours of April 3, continuing at times into late morning. Winds shifted northwest and increased substantially with gusts of 30 to 35 mph at times through the late morning and afternoon, lowering visibility under a mile at times 1000-1300CST. Snowfall totaled 3.0 inches at Flandreau.

Winter Weather in KINGSBURY, SOUTH DAKOTA
From 02-APR-18 22:00:00 to 03-APR-18 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the predawn hours of April 3, continuing at times into late morning. Winds shifted northwest and increased substantially with gusts of 30 to 35 mph at times through the morning and early afternoon, lowering visibility under a mile at times 0800-1200CST. Snowfall totaled 2.5 inches at DeSmet and 2.4 inches at Iroquois.

Winter Weather in BON HOMME, SOUTH DAKOTA
From 02-APR-18 23:00:00 to 03-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the predawn hours of April 3, continuing at times into early afternoon. Winds shifted northwest and increased substantially with gusts of 30 to 40 mph at times through the afternoon, lowering visibility under a mile at times 0700-1200CST. Snowfall totaled 5.2 inches at Tyndall and 3.0 inches 8 miles west of Springfield.

Winter Weather in BROOKINGS, SOUTH DAKOTA
From 02-APR-18 22:00:00 to 03-APR-18 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the morning hours of April 3, continuing at times into early afternoon. Winds shifted northwest and increased substantially with gusts of 30 to 40 mph at times through the afternoon, lowering visibility under a mile at times 1000-1400CST. Snowfall totaled 2.7 inches at Brookings and 2.3 inches 4 miles northeast of Bruce.

Winter Weather in MCCOOK, SOUTH DAKOTA
From 02-APR-18 23:00:00 to 03-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the predawn hours of April 3, continuing at times into late morning. Winds shifted northwest and increased substantially with gusts of 30 to 35 mph at times through the late morning and afternoon, lowering visibility under a mile at times 0800-1300CST. Snowfall totaled 4.0 inches at Montrose and Bridgewater, and 3.5 inches 5 miles northeast of Salem.

Winter Weather in CHARLES MIX, SOUTH DAKOTA
From 02-APR-18 23:00:00 to 03-APR-18 15:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the morning hours of April 3, continuing at times into early afternoon. Winds shifted northwest and increased substantially with gusts of 30 to 40 mph at times through the afternoon, lowering visibility under a mile at times 0700-1100CST. Snowfall totaled 5.0 inches near Wagner and 4.0 inches 2 miles northeast of Academy.

Winter Weather in LAKE, SOUTH DAKOTA
From 02-APR-18 22:00:00 to 03-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the predawn hours of April 3, continuing at times into late morning. Winds shifted northwest and increased substantially with gusts of 30 to 35 mph at times through the morning and early afternoon, lowering visibility under a mile at times 0800-1300CST. Snowfall totaled 4.1 inches 2 miles north of Chester and  3.0 inches 2 miles southeast of Madison.

Winter Weather in LINCOLN, SOUTH DAKOTA
From 02-APR-18 23:00:00 to 03-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the predawn hours of April 3, continuing at times into late morning. Winds shifted northwest and increased substantially with gusts of 30 to 35 mph at times through the morning and early afternoon, lowering visibility under a mile at times 0800-1200CST. Snowfall totaled 4.7 inches at Canton.

Winter Weather in MINNEHAHA, SOUTH DAKOTA
From 02-APR-18 23:00:00 to 03-APR-18 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A period of more intense snowfall developed in the predawn hours of April 3, continuing at times into late morning. Winds shifted northwest and increased substantially with gusts of 30 to 35 mph at times through the late morning and afternoon, lowering visibility under a mile at times 0800-1200CST. Snowfall totaled 5.6 inches 3 miles southeast of Sioux Falls and 5.3 inches at the NWS office at Joe Foss Field in Sioux Falls.