Much of the Big Sioux basin received from one to two inches of liquid equivalent in the week leading up to the more significant flooding, including snow melt moisture from the historic blizzard on April 14. Much of the river remained in flood at the end of the month.

Flood in MOODY, SOUTH DAKOTA
From 21-APR-18 09:00:00 to 30-APR-18 23:59:00 (CST-6)
Location: FLANDREAU
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced major flooding which produced significant impact to lowland agricultural areas. Several county roads were inundated with water as river levels reached 3.3 feet above flood stage near Brookings (gage site BRKS2) on April 24. The river remained at moderate flood stage at the end of the month.

Flood in MOODY, SOUTH DAKOTA
From 23-APR-18 05:00:00 to 30-APR-18 07:00:00 (CST-6)
Location: FLANDREAU
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced minor flooding which produced significant impact to lowland agricultural areas, and inundated a couple of county roads near the gage. River levels reached 2.4 feet above flood stage near Flandreau (gage site BSFS2) on April 25.

Flood in MOODY, SOUTH DAKOTA
From 23-APR-18 17:00:00 to 30-APR-18 23:00:00 (CST-6)
Location: FLANDREAU
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced moderate flooding which produced significant impact to lowland agricultural areas, and flooded the road near the bridge near Egan Park. River levels reached 3.8 feet above flood stage near Egan (gage site EGAS2) on April 26.

Flood in MOODY, SOUTH DAKOTA
From 23-APR-18 22:00:00 to 30-APR-18 22:00:00 (CST-6)
Location: LONE TREE
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced moderate flooding which produced significant impact to lowland agricultural areas, as well as inundated 478th Ave and 242nd St. with water reaching into backyards of several homes in Trent. River levels reached 3.0 feet above flood stage near Trent (gage site TRES2) on April 26.

Flood in MINNEHAHA, SOUTH DAKOTA
From 21-APR-18 09:00:00 to 30-APR-18 23:59:00 (CST-6)
Location: DELL RAPIDS
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced moderate flooding which produced significant impact to lowland agricultural areas and the city park in Dell Rapids. River levels reached 2.2 feet above flood stage at Dell Rapids (gage site DERS2) on April 27. The river remained at minor flood stage at the end of the month.

Flood in BROOKINGS, SOUTH DAKOTA
From 20-APR-18 22:00:00 to 30-APR-18 23:59:00 (CST-6)
Location: BRUCE
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced moderate flooding which produced significant impact to lowland agricultural areas. River levels reached 2.2 feet above flood stage near Bruce (gage site BRCS2) on April 23. The river remained at minor flood stage at the end of the month.

Flood in MINNEHAHA, SOUTH DAKOTA
From 20-APR-18 09:00:00 to 30-APR-18 23:59:00 (CST-6)
Location: RENNER
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced moderate flooding which produced significant impact to lowland agricultural areas. River levels reached 4.3 feet above flood stage at Sioux Falls near Interstate 90 (gage site SFLS2) on April 28. The river remained at minor flood stage at the end of the month.

Flood in MINNEHAHA, SOUTH DAKOTA
From 21-APR-18 10:00:00 to 30-APR-18 23:59:00 (CST-6)
Location: BRANDON
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced moderate flooding which produced significant impact to lowland agricultural areas. River levels reached 3.4 feet above flood stage near Brandon (gage site BBSS2) on April 28. The river remained at minor flood stage at the end of the month.

Flood in LINCOLN, SOUTH DAKOTA
From 22-APR-18 05:00:00 to 30-APR-18 23:59:00 (CST-6)
Location: CANTON MUNI ARPT
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced minor flooding which produced significant impact to lowland agricultural areas. River levels reached 1.7 feet above flood stage at Canton (gage site CBSS2) on April 29. The river remained at minor flood stage at the end of the month.

Flood in LINCOLN, SOUTH DAKOTA
From 21-APR-18 10:00:00 to 30-APR-18 23:59:00 (CST-6)
Location: SHINDLER
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced moderate flooding which produced significant impact to lowland agricultural areas. River levels reached 3.4 feet above flood stage near Brandon (gage site BBSS2) on April 28. The river remained at minor flood stage at the end of the month.

Flood in UNION, SOUTH DAKOTA
From 21-APR-18 19:00:00 to 30-APR-18 23:59:00 (CST-6)
Location: ALCESTER
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced moderate flooding which produced significant impact to lowland agricultural areas, and inundated SD Highway 46 for several days. River levels reached 5.9 feet above flood stage above Hawarden (gage site HWDI4) on April 24. The river remained at minor flood stage at the end of the month.

Flood in UNION, SOUTH DAKOTA
From 21-APR-18 22:00:00 to 30-APR-18 23:59:00 (CST-6)
Location: BIG SPGS
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced moderate flooding which produced significant impact to lowland agricultural areas. Several farmhouses were isolated by the high water levels. River levels reached 3.6 feet above flood stage at Akron (gage site AKRI4) on April 25. The river remained at minor flood stage at the end of the month.

Flood in BROOKINGS, SOUTH DAKOTA
From 20-APR-18 07:00:00 to 30-APR-18 23:59:00 (CST-6)
Location: BRUCE
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced moderate flooding which produced significant impact to lowland agricultural areas. River levels reached 1.9 feet above flood stage near Estelline (gage site BSES2) on April 23. The river remained at minor flood stage at the end of the month.

Flood in BROOKINGS, SOUTH DAKOTA
From 23-APR-18 22:00:00 to 28-APR-18 09:00:00 (CST-6)
Location: MEDARY
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced minor flooding which produced significant impact to lowland agricultural areas. River levels reached 0.8 feet above flood stage near Medary (gage site BSMS2) on April 24.

Flood in BROOKINGS, SOUTH DAKOTA
From 21-APR-18 04:00:00 to 24-APR-18 17:00:00 (CST-6)
Location: WHITE
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall briefly produced moderate flooding which produced significant impact to lowland agricultural areas and flooded several township roads northeast of Brookings. River levels reached 1.5 feet above flood stage on Sixmile Creek near Brookings (gage site SMCS2) on April 23.

Flood in BROOKINGS, SOUTH DAKOTA
From 23-APR-18 02:00:00 to 23-APR-18 20:00:00 (CST-6)
Location: BRUCE
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall briefly produced minor flooding which produced significant impact to lowland agricultural areas. River levels reached 0.5 feet above flood stage on North Deer Creek near Brookings (gage site NDCS2) on April 23.

Flood in MOODY, SOUTH DAKOTA
From 23-APR-18 09:00:00 to 23-APR-18 21:00:00 (CST-6)
Location: FLANDREAU
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall briefly produced minor flooding with significant impact to lowland agricultural areas and inundated sections of the Flandreau golf course. River levels reached 1.1 feet above flood stage on Flandreau Creek near Flandreau (gage site FCRS2) on April 23.

Flood in MINNEHAHA, SOUTH DAKOTA
From 20-APR-18 21:00:00 to 26-APR-18 05:00:00 (CST-6)
Location: SHERMAN
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall briefly produced minor flooding with impact to lowland agricultural areas and inundated several low water crossings near the Minnesota border. River levels reached 1.6 feet above flood stage on Split Rock Creek below Jasper (gage site JSPM5) on April 21.

Flood in MOODY, SOUTH DAKOTA
From 23-APR-18 22:00:00 to 28-APR-18 09:00:00 (CST-6)
Location: COLMAN
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Snow melt and runoff from periods of heavier rainfall produced minor flooding which produced significant impact to lowland agricultural areas. River levels reached 0.8 feet above flood stage near Medary (gage site BSMS2) on April 24.