The second of three rare October heavy snow events occurred across north central and northeast South Dakota on October 21st and 22nd. An upper level low pressure trough from the northwest traversing over rare October cold air brought heavy snow of 6 to 13 inches to the region.  Roads became snow covered and difficult to travel.  Also, school starts were delayed or were closed for the day.
Snowfall amounts from across the region include, 6 inches 4 miles northwest of Onida, Rosholt, and 6 miles west of Pierpont; 7 inches at Roscoe, Aberdeen, and Timber Lake; 8 inches 4 miles north of Victor and 12 miles north of Highmore; 9 inches 4 miles west of Sisseton, Selby, and 7 miles east of Hayes; 10 inches 18 miles north of Holabird and Britton; and 11 inches 11 miles southwest of Eureka.  Locations with a foot or more of snow include, 12 inches 5 miles northwest of Leola, 2 miles southeast of Kenel, and 4 miles southeast of Herreid; and 13 inches 1 mile south of Artas.
The three rare heavy snow producing systems along with the abnormally cold air set numerous temperature and snowfall records.  Most locations across the region had both their top ten coldest and snowiest Octobers on record. In fact, Mobridge, Sisseton, and Timber Lake had their snowiest October on record.  There were also numerous daily temperature records set for many locations from the 19th through the 28th.

Heavy Snow in CAMPBELL, SOUTH DAKOTA
From 21-OCT-20 19:00:00 to 22-OCT-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Heavy Snow in WALWORTH, SOUTH DAKOTA
From 21-OCT-20 18:00:00 to 22-OCT-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy Snow in MARSHALL, SOUTH DAKOTA
From 22-OCT-20 00:00:00 to 22-OCT-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy Snow in DAY, SOUTH DAKOTA
From 22-OCT-20 00:00:00 to 22-OCT-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy Snow in CORSON, SOUTH DAKOTA
From 21-OCT-20 19:00:00 to 22-OCT-20 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy Snow in DEWEY, SOUTH DAKOTA
From 21-OCT-20 21:00:00 to 22-OCT-20 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy Snow in POTTER, SOUTH DAKOTA
From 21-OCT-20 19:30:00 to 22-OCT-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in EDMUNDS, SOUTH DAKOTA
From 21-OCT-20 21:30:00 to 22-OCT-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy Snow in ROBERTS, SOUTH DAKOTA
From 22-OCT-20 00:00:00 to 22-OCT-20 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy Snow in SULLY, SOUTH DAKOTA
From 21-OCT-20 21:00:00 to 22-OCT-20 15:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy Snow in FAULK, SOUTH DAKOTA
From 21-OCT-20 21:00:00 to 22-OCT-20 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy Snow in BROWN, SOUTH DAKOTA
From 21-OCT-20 23:30:00 to 22-OCT-20 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy Snow in STANLEY, SOUTH DAKOTA
From 21-OCT-20 21:00:00 to 22-OCT-20 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy Snow in HYDE, SOUTH DAKOTA
From 21-OCT-20 21:00:00 to 22-OCT-20 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy Snow in MCPHERSON, SOUTH DAKOTA
From 21-OCT-20 19:30:00 to 22-OCT-20 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer