A deep trough again progressed through the Rockies and evolved to a compact closed mid-level circulation drifting across eastern Nebraska and Iowa on April 18.  Snow increased rapidly during the pre-dawn hours, but also dissipated quickly in the late afternoon and evening, leaving behind between 2 and 6 inches snowfall across areas of southeast South Dakota north of Interstate 90.

Winter Weather in BRULE, SOUTH DAKOTA
From 18-APR-18 02:00:00 to 18-APR-18 10:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snow developed rapidly in the early morning hours after 0200CST. Visibility dropped to a mile or less at times between 0630-0830CST. Snowfall totaled 4.0 inches 5 miles south of Chamberlain.

Winter Weather in AURORA, SOUTH DAKOTA
From 18-APR-18 02:00:00 to 18-APR-18 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snow developed rapidly in the early morning hours after 0200CST. Visibility dropped to a mile or less at times between 0630-0930CST. Snowfall totaled 4.3 inches at White Lake.

Winter Weather in DAVISON, SOUTH DAKOTA
From 18-APR-18 02:00:00 to 18-APR-18 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snow developed rapidly in the early morning hours after 0200CST. Visibility dropped to a mile or less at times between 0230-0800CST. Snowfall totaled 3.2 inches at Mitchell.

Winter Weather in HANSON, SOUTH DAKOTA
From 18-APR-18 02:00:00 to 18-APR-18 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snow developed rapidly in the early morning hours after 0200CST. Visibility dropped to a mile or less at times between 0230-0800CST. Snowfall totaled 2.0 inches at Alexandria.

Winter Weather in JERAULD, SOUTH DAKOTA
From 18-APR-18 02:00:00 to 18-APR-18 09:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snow developed rapidly in the early morning hours after 0200CST. Visibility dropped to a mile or less at times between 0600-0800CST. Snowfall totaled 3.0 inches at Wessington Springs.

Winter Weather in SANBORN, SOUTH DAKOTA
From 18-APR-18 02:00:00 to 18-APR-18 10:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snow developed rapidly in the early morning hours after 0200CST. Visibility dropped to a mile or less at times between 0600-0800CST. Snowfall totaled 2.0 inches 4 miles north northeast of Forestburg.

Winter Weather in MINER, SOUTH DAKOTA
From 18-APR-18 03:00:00 to 18-APR-18 10:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snow developed rapidly in the early morning hours after 0300CST. Visibility dropped to a mile or less at times between 0500-0800CST. Snowfall totaled 2.4 inches at Howard.

Winter Weather in LAKE, SOUTH DAKOTA
From 18-APR-18 03:00:00 to 18-APR-18 11:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snow developed rapidly in the early morning hours after 0300CST. Visibility dropped to a mile or less at times between 0500-0800CST. Snowfall totaled 3.0 inches 2 miles north of Chester.

Winter Weather in BEADLE, SOUTH DAKOTA
From 18-APR-18 01:00:00 to 18-APR-18 09:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snow developed rapidly in the early morning hours after 0100CST. Visibility dropped to a mile or less at times between 0500-0800CST. Snowfall totaled 2.0 inches at Huron and 1.5 inches 2 miles southeast of Wessington.