The snowfall during the season in northeast and central South Dakota exceeded normal levels, with many locations ranking among the top 10 for the snowiest seasons. Additionally, the late spring conditions were unusually cold, resulting in a persistent and exceptionally deep snowpack until early April. The depth of the snowpack ranged from 15 to 30 plus inches, containing approximately 4 to 8 inches of snow water equivalent. However, the weather pattern shifted to abnormally warm conditions in the middle of April. Starting from April 9th, temperatures rapidly rose into the 40s and 50s in areas with deep snowpack, and occasionally reached the 60s and 70s thereafter. The rapid snowmelt that followed resulted in extensive overland flooding in the region between April 10th and 18th.
Flooding resulted in severe damage to public infrastructure. Several reports surfaced of county and township roads being washed out or submerged in water across central and northeastern South Dakota. The communities of Wilmot, SD, and Corona, SD, experienced significant and widespread flooding. In Grant County, SD, a water rescue was carried out after a motorist drove into a flooded roadway. Furthermore, flooding impacted infrastructure along Big Stone Lake in Grant County, Lake Kampeska in Codington County, and the Lake Traverse Reservation. A Presidential Disaster Declaration was approved for Brown, Clark, Codington, Day, Faulk, Grant, Hand, Marshall, Potter and Roberts Counties, as well as for the Lake Traverse Indian Reservation, where an estimated $2,305,362 in total qualifying costs were incurred.

Flood in BROWN, SOUTH DAKOTA
From 10-APR-23 00:00:00 to 18-APR-23 23:59:00 (CST-6)
Location: WINSHIP
Flood cause: Heavy Rain / Snow Melt
Property damage: 150.00K
Crop damage: 150.00K
Reported by: Law Enforcement

Flood in SPINK, SOUTH DAKOTA
From 10-APR-23 00:00:00 to 18-APR-23 23:59:00 (CST-6)
Location: MANSFIELD
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flood in CODINGTON, SOUTH DAKOTA
From 10-APR-23 00:00:00 to 18-APR-23 23:59:00 (CST-6)
Location: WALLACE
Flood cause: Heavy Rain / Snow Melt
Property damage: 150.00K
Crop damage: 150.00K
Reported by: Law Enforcement

Flood in GRANT, SOUTH DAKOTA
From 10-APR-23 00:00:00 to 18-APR-23 23:59:00 (CST-6)
Location: HILAND
Flood cause: Heavy Rain / Snow Melt
Property damage: 150.00K
Crop damage: 150.00K
Reported by: Law Enforcement

Flood in MCPHERSON, SOUTH DAKOTA
From 12-APR-23 00:00:00 to 14-APR-23 23:59:00 (CST-6)
Location: GREENWAY
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flood in ROBERTS, SOUTH DAKOTA
From 10-APR-23 00:00:00 to 18-APR-23 23:59:00 (CST-6)
Location: DAHLBERG
Flood cause: Heavy Rain / Snow Melt
Property damage: 150.00K
Crop damage: 150.00K
Reported by: Law Enforcement

Flood in HYDE, SOUTH DAKOTA
From 09-APR-23 00:00:00 to 18-APR-23 23:59:00 (CST-6)
Location: HOLABIRD
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Many county and township roads were underwater, including a portion of 342nd Avenue, between 174 and 179th street in the northeast portion of the county, which was washed out.

Flood in MARSHALL, SOUTH DAKOTA
From 12-APR-23 00:00:00 to 17-APR-23 23:59:00 (CST-6)
Location: NEWARK
Flood cause: Heavy Rain / Snow Melt
Property damage: 150.00K
Crop damage: 150.00K
Reported by: Law Enforcement

Many roadways were flooded, including Marshall County Road 11 south of Amherst.

Flood in EDMUNDS, SOUTH DAKOTA
From 10-APR-23 00:00:00 to 18-APR-23 23:59:00 (CST-6)
Location: BOWDLE
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flood in DAY, SOUTH DAKOTA
From 12-APR-23 00:00:00 to 17-APR-23 23:59:00 (CST-6)
Location: PIERPONT
Flood cause: Heavy Rain / Snow Melt
Property damage: 150.00K
Crop damage: 150.00K
Reported by: Law Enforcement

Many roadways were flooded, including 447th Avenue south of Waubay.

Flood in CLARK, SOUTH DAKOTA
From 10-APR-23 00:00:00 to 18-APR-23 23:59:00 (CST-6)
Location: CROCKER
Flood cause: Heavy Rain / Snow Melt
Property damage: 150.00K
Crop damage: 150.00K
Reported by: Law Enforcement

Flood in FAULK, SOUTH DAKOTA
From 10-APR-23 00:00:00 to 18-APR-23 23:59:00 (CST-6)
Location: ONAKA
Flood cause: Heavy Rain / Snow Melt
Property damage: 150.00K
Crop damage: 150.00K
Reported by: Law Enforcement

Flood in HAMLIN, SOUTH DAKOTA
From 10-APR-23 00:00:00 to 12-APR-23 23:59:00 (CST-6)
Location: HAZEL
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A few roads, including County Road 465 north of Estelline, had water across the roadway from overland flooding.

Flood in HAND, SOUTH DAKOTA
From 10-APR-23 00:00:00 to 18-APR-23 23:59:00 (CST-6)
Location: POLO
Flood cause: Heavy Rain / Snow Melt
Property damage: 150.00K
Crop damage: 150.00K
Reported by: Law Enforcement

Flood in POTTER, SOUTH DAKOTA
From 10-APR-23 00:00:00 to 18-APR-23 23:59:00 (CST-6)
Location: GETTYSBURG
Flood cause: Heavy Rain / Snow Melt
Property damage: 150.00K
Crop damage: 150.00K
Reported by: Law Enforcement