Spurred by a period of excessive precipitation from September 10-12 that resulted in 5 to 10 inches of rainfall in the middle to upper reaches of the Big Sioux River Basin and 2 to 5 inches from Sioux Falls downstream, extreme rises occurred mid-month, with many basin locations reaching record stages.  Recreational usage of the Big Sioux River, Split Rock Creek and Skunk Creek (in Moody, Minnehaha, Lincoln and Union counties) was banned for much of the remainder of the month.

Flood in MOODY, SOUTH DAKOTA
From 11-SEP-19 11:30:00 to 21-SEP-19 15:30:00 (CST-6)
Location: FLANDREAU
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (6.71 inches 11 miles north of Colman, 8.82 inches at Flandreau), the Big Sioux River above Flandreau (gage site BSFS2) reached the highest stage on record of 5.29 feet above flood stage on September 13. Water inundated Flandreau Park as well as numerous county and township roads north of Flandreau.

Flood in MOODY, SOUTH DAKOTA
From 11-SEP-19 05:30:00 to 14-SEP-19 16:30:00 (CST-6)
Location: FLANDREAU
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (8.93 inches at Flandreau and 8.64 inches near Pipestone), Flandreau Creek near Flandreau (gage site FCRS2) reached the highest stage on record of 5.46 feet above flood stage on September 12. 487th Avenue at the gage site and numerous other township roads were inundated by water, as well as the Flandreau Golf Club.  Significant amounts of agricultural land were also flooded.

Flood in MINNEHAHA, SOUTH DAKOTA
From 11-SEP-19 06:00:00 to 30-SEP-19 23:59:00 (CST-6)
Location: BRANDON
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (8.74 inches at Flandreau, 7.81 inches at Dell Rapids and generally 3 to 4 inches around Sioux Falls), the Big Sioux River near Brandon (gage site BBSS2) reached the highest stage on record of 9.53 feet above flood stage on September 14. Significant amounts of rural flooding occurred, with inundation of much of the Big Sioux Recreation Area.  Minor flooding continued at the end of the month.

Flood in LINCOLN, SOUTH DAKOTA
From 11-SEP-19 06:00:00 to 30-SEP-19 23:59:00 (CST-6)
Location: SHINDLER
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (8.74 inches at Flandreau, 7.81 inches at Dell Rapids and generally 3 to 4 inches around Sioux Falls), the Big Sioux River near Brandon (gage site BBSS2) reached the highest stage on record of 9.53 feet above flood stage on September 14. Significant amounts of rural flooding occurred, with inundation of much of the Big Sioux Recreation Area and lower trails in Good Earth and Gitchie Manitou State Parks.  Minor flooding continued at the end of the month.

Flood in MOODY, SOUTH DAKOTA
From 12-SEP-19 03:30:00 to 15-SEP-19 02:00:00 (CST-6)
Location: COLMAN
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (record 2-day 8.52 inches 2 miles north of Chester), Skunk Creek near Chester (gage site SCCS2) reached the second highest stage on record of 0.33 feet above flood stage on September 12.  Significant amounts of agricultural land were inundated.

Flood in MOODY, SOUTH DAKOTA
From 11-SEP-19 23:00:00 to 15-SEP-19 00:00:00 (CST-6)
Location: FLANDREAU MUNI ARPT
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (record 2-day rainfall of 6.75 inches at Pipestone), Pipestone Creek below Pipestone (gage site PSTM5) reached the highest stage on record of 1.74 feet above flood stage on September 12. A water rescue was necessary when a motorist drove into rapidly flowing waters on Minnesota State Highway 30 around 315 am on September 12. In total, 13.5 miles of county maintained roads were under water at one point. Significant flooding of agricultural land occurred.

Flood in MINNEHAHA, SOUTH DAKOTA
From 11-SEP-19 23:30:00 to 21-SEP-19 17:00:00 (CST-6)
Location: LYONS
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (record 2-day 8.52 inches 2 miles north of Chester and 8.50 inches at Colton), Skunk Creek near Hartford (gage site HTFS2) reached the highest stage on record of 4.05 feet above flood stage on September 12. Significant amounts of agricultural land were inundated, and state highway 38 was closed due to water over the roadway.

Flood in MOODY, SOUTH DAKOTA
From 11-SEP-19 08:00:00 to 26-SEP-19 12:00:00 (CST-6)
Location: FLANDREAU
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (6.71 inches 11 miles north of Colman, 8.82 inches at Flandreau), the Big Sioux River near Egan (gage site EGAS2) reached the highest stage on record of 7.70 feet above flood stage on September 12. Extensive agricultural flooding occurred around Egan, and water encroached into homes on the east side of Egan.

Flood in MOODY, SOUTH DAKOTA
From 11-SEP-19 07:00:00 to 30-SEP-19 05:00:00 (CST-6)
Location: FLANDREAU
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 100.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (6.57 inches near Aurora, 6.55 inches 3 miles west southwest of Brookings, 6.27 inches 8 miles south of Brookings), the Big Sioux River near Brookings (gage site BRKS2) reached the second highest stage on record of 5.39 feet above flood stage on September 13. Numerous county roads and bridges were inundated, with a few farm outbuildings engulfed in water.  Agricultural flooding was extensive.

Flood in MOODY, SOUTH DAKOTA
From 11-SEP-19 07:30:00 to 26-SEP-19 12:00:00 (CST-6)
Location: LONE TREE
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (6.71 inches 11 miles north of Colman, 8.82 inches at Flandreau), the Big Sioux River at Trent (gage site TRES2) reached the highest stage on record of 6.24 feet above flood stage on September 13. Numerous houses were inundated in Trent, as well as almost all county and township roads in the area near the river.

Flood in BROOKINGS, SOUTH DAKOTA
From 11-SEP-19 19:30:00 to 15-SEP-19 23:00:00 (CST-6)
Location: MEDARY
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (6.57 inches near Aurora), Medary Creek near Medary (gage site MDYS2) reached the highest stage on record of 3.86 feet above flood stage on September 12. Numerous county and township roads were inundated, along with considerable flooding of agricultural land near the creek.

Flood in MINNEHAHA, SOUTH DAKOTA
From 11-SEP-19 13:00:00 to 28-SEP-19 07:00:00 (CST-6)
Location: DELL RAPIDS
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (8.74 inches at Flandreau, 7.81 inches at Dell Rapids), the Big Sioux River below Dell Rapids (gage site DERS2) reached the highest stage on record of 4.72 feet above flood stage on September 13.  Numerous county roads were inundated,  and flood waters cut off all access to the city of Baltic except one.

Flood in MINNEHAHA, SOUTH DAKOTA
From 11-SEP-19 15:00:00 to 30-SEP-19 08:00:00 (CST-6)
Location: RENNER
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (8.74 inches at Flandreau, 7.81 inches at Dell Rapids), the Big Sioux River at Sioux Falls I-90 (gage site SFLS2) reached the second highest stage on record of 6.91 feet above flood stage on September 14. Extensive flooding of homes occurred in Renner, with seven people evacuated due to high water.

Flood in MINNEHAHA, SOUTH DAKOTA
From 11-SEP-19 09:30:00 to 24-SEP-19 02:00:00 (CST-6)
Location: DELL RAPIDS
Flood cause: Heavy Rain
Property damage: 750.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (8.74 inches at Flandreau, 7.81 inches at Dell Rapids), the Big Sioux River above Dell Rapids (gage site DBRS2) reached the highest stage on record of 9.00 feet above flood stage on September 13. Extensive flooding of homes occurred in Dell Rapids, some as far as three city blocks from the river. A dozen homes were deemed to have substantial damage, and removed after being flooded.  Jasper Road east of Dell Rapids was closed due to water over the roadway.

Flood in LINCOLN, SOUTH DAKOTA
From 12-SEP-19 06:00:00 to 25-SEP-19 21:00:00 (CST-6)
Location: CANTON MUNI ARPT
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (8.74 inches at Flandreau, 7.81 inches at Dell Rapids and generally 3 to 4 inches around Sioux Falls), the Big Sioux River above Canton (gage site CBSS2) reached the second highest stage on record of 10.88 feet above flood stage on September 13. Significant amounts of rural flooding occurred, and high water forced brief closure of U.S. Highway 18 east of Canton.

Flood in MINNEHAHA, SOUTH DAKOTA
From 12-SEP-19 01:30:00 to 20-SEP-19 06:00:00 (CST-6)
Location: NORTON ACRES
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (8.74 inches at Flandreau, 7.81 inches at Dell Rapids and generally 3 to 4 inches around Sioux Falls), the Big Sioux River at Sioux Falls North Cliff (gage site SXFS2) reached the third highest stage on record of 10.06 feet above flood stage on September 14. Significant rural flooding occurred east of Sioux Falls, with the inundation of Timberline Road and parts of 60th Street north.

Flood in MINNEHAHA, SOUTH DAKOTA
From 12-SEP-19 02:00:00 to 20-SEP-19 13:00:00 (CST-6)
Location: SOUTH SIOUX FALLS
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (8.74 inches at Flandreau, 7.81 inches at Dell Rapids, and generally 3 to 4 inches around Sioux Falls), the Big Sioux River at Western Avenue (gage site WAVS2) reached the 9th highest stage on record of 5.21 feet above flood stage on September 13. Extensive flooding of city parks within the greenway occurred, along with high water closing portions of east 41st Street near Lincoln High School.

Flood in LINCOLN, SOUTH DAKOTA
From 12-SEP-19 02:00:00 to 20-SEP-19 13:00:00 (CST-6)
Location: SIOUX FALLS
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (8.74 inches at Flandreau, 7.81 inches at Dell Rapids, and generally 3 to 4 inches around Sioux Falls), the Big Sioux River at Western Avenue (gage site WAVS2) reached the 9th highest stage on record of 5.21 feet above flood stage on September 13. Extensive flooding of city parks within the greenway occurred, along with high water closing portions of east 41st Street near Lincoln High School.

Flood in MINNEHAHA, SOUTH DAKOTA
From 12-SEP-19 02:00:00 to 17-SEP-19 05:00:00 (CST-6)
Location: SHERMAN
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (record 2-day rainfall of 6.75 inches at Pipestone), Split Rock Creek below Jasper (gage site JSPM5) reached the highest stage on record of 9.39 feet above flood stage on September 12.  Numerous county roads were under water near Sherman, including 250th Street.

Flood in BROOKINGS, SOUTH DAKOTA
From 12-SEP-19 03:00:00 to 13-SEP-19 19:30:00 (CST-6)
Location: WHITE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (5.76 inches 8 miles north of Aurora, 5.41 inches at Brookings), Sixmile Creek above Brookings (gage site SMCS2) reached the highest stage on record of 1.65 feet above flood stage on September 12. Water flooded numerous city streets on the northwest side of Brookings, along with township roads north and northeast of Brookings.

Flood in MINNEHAHA, SOUTH DAKOTA
From 12-SEP-19 03:30:00 to 15-SEP-19 02:00:00 (CST-6)
Location: HUNTIMER
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (record 2-day 8.52 inches 2 miles north of Chester and 8.50 inches at Colton), Skunk Creek near Chester (gage site SCCS2) reached the second highest stage on record of 0.33 feet above flood stage on September 12.  Significant amounts of agricultural land were inundated, with 467th Avenue closed north of Lyons.

Flood in MINNEHAHA, SOUTH DAKOTA
From 12-SEP-19 04:30:00 to 16-SEP-19 06:00:00 (CST-6)
Location: GARRETSON
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (record 2-day rainfall of 6.75 inches at Pipestone, 4.37 inches near Garretson), Split Rock Creek near Corson (gage site COSS2) reached the highest stage on record of 10.20 feet above flood stage on September 12. Flood waters completely inundated the Brandon golf course, with State Highway 11 closed in multiple locations.  Numerous homes were inundated by water.
Numerous county roads were under water near Sherman, including 250th Street.

Flood in BROOKINGS, SOUTH DAKOTA
From 12-SEP-19 05:00:00 to 26-SEP-19 21:00:00 (CST-6)
Location: BRUCE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 25.00K
Reported by: River/Stream Gage

Runoff from around two days of heavy rainfall (3.49 inches 5 miles west of Bruce and 2.76 inches at Bruce) returned moderate flooding to the Big Sioux River near Bruce (gage site BRCS2). The river crested at 1.68 feet above flood stage on September 14 with significant flooding of agricultural land.

Flood in UNION, SOUTH DAKOTA
From 12-SEP-19 08:30:00 to 26-SEP-19 21:00:00 (CST-6)
Location: ALCESTER
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (7.81 inches at Dell Rapids, generally 3 to 4 inches around Sioux Falls, 4.72 inches at Canton), the Big Sioux River above Hawarden (gage site HWDI4) reached the third highest stage on record of 12.33 feet above flood stage on September 15. Significant amounts of the agricultural flood plain were inundated, and numerous roads were closed including South Dakota Highway 46, Iowa Highway 10 and South Dakota county road 13.

Flood in LINCOLN, SOUTH DAKOTA
From 12-SEP-19 10:00:00 to 25-SEP-19 20:00:00 (CST-6)
Location: HUDSON
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (7.81 inches at Dell Rapids, generally 3 to 4 inches around Sioux Falls, 4.72 inches at Canton), the Big Sioux River at Fairview (gage site FVWS2) reached the highest stage on record of 11.14 feet above flood stage on September 14. Significant amounts of the agricultural flood plain were inundated.

Flood in UNION, SOUTH DAKOTA
From 16-SEP-19 05:00:00 to 23-SEP-19 01:00:00 (CST-6)
Location: ELK PT
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (generally 3 to 4 inches around Sioux Falls, 4.72 inches at Canton, 2.51 inches at Hawarden), the Big Sioux River near Jefferson (gage site BSJS2) reached the 3rd highest stage on record of 5.83 feet above flood stage on September 18. Significant amounts of the agricultural flood plain were inundated, and numerous county roads were closed including the bridge over the Big Sioux River on County Road 7.

Flood in UNION, SOUTH DAKOTA
From 13-SEP-19 10:00:00 to 28-SEP-19 22:00:00 (CST-6)
Location: RICHLAND
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (generally 3 to 4 inches around Sioux Falls, 4.72 inches at Canton, 2.51 inches at Hawarden), the Big Sioux River near Richland (gage site BSRS2) reached the 3rd highest stage on record of 6.51 feet above flood stage on September 17. Significant amounts of the agricultural flood plain were inundated, and numerous roads were closed including South Dakota Highway 50 and Iowa Highway 3.

Flood in UNION, SOUTH DAKOTA
From 12-SEP-19 16:30:00 to 28-SEP-19 15:00:00 (CST-6)
Location: BIG SPGS
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (7.81 inches at Dell Rapids, generally 3 to 4 inches around Sioux Falls, 4.72 inches at Canton), the Big Sioux River at Akron (gage site AKRI4) reached the 9th highest stage on record of 6.28 feet above flood stage on September 16. Significant amounts of the agricultural flood plain were inundated, and numerous roads were closed including South Dakota Highway 48, and Iowa Highways 12 and 3.

Flood in MINNEHAHA, SOUTH DAKOTA
From 12-SEP-19 14:00:00 to 15-SEP-19 14:00:00 (CST-6)
Location: HARTFORD
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (record 2-day totals of 8.52 inches 2 miles north of Chester and 8.50 inches at Colton), Skunk Creek at Sioux Falls (gage site SIFS2) reached the fourth highest stage on record of 2.35 feet above flood stage on September 13. City parts along Skunk Creek were again inundated, and parts of Madison Street and 12th Street were closed due to high water.

Flood in BROOKINGS, SOUTH DAKOTA
From 12-SEP-19 12:30:00 to 22-SEP-19 16:30:00 (CST-6)
Location: BRUCE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 10.00K
Reported by: River/Stream Gage

After upstream rainfall during September 10-12 of 3.12 inches 4 miles southwest of Toronto and 2.35 inches near Castlewood, the Big Sioux River near Estelline (gage site BSES2) reached a crest of 1.04 feet above flood stage on September 13. High water resulted in widespread flooding of agricultural lands.

Flood in MINNEHAHA, SOUTH DAKOTA
From 12-SEP-19 03:00:00 to 14-SEP-19 23:00:00 (CST-6)
Location: LYONS
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (record 2-day 8.50 inches at Colton and 3.52 inches 4 miles northwest of Renner), Willow Creek near Crooks (gage site WCCS2) reached the 5th highest stage on record of 2.41 feet above flood stage on September 12. Significant amounts of agricultural land were inundated, as well as several county and township roads.

Flood in LAKE, SOUTH DAKOTA
From 12-SEP-19 03:30:00 to 15-SEP-19 02:00:00 (CST-6)
Location: CHESTER
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (record 2-day 8.52 inches 2 miles north of Chester), Skunk Creek near Chester (gage site SCCS2) reached the second highest stage on record of 0.33 feet above flood stage on September 12.  Significant amounts of agricultural land were inundated.

Flood in MINNEHAHA, SOUTH DAKOTA
From 13-SEP-19 14:00:00 to 19-SEP-19 09:00:00 (CST-6)
Location: RENNER
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

After excessive two-day rainfall during September 10-12 (6.01 inches 7 miles west of Garretson, 3.99 inches 6 miles north of Sioux Falls), Silver Creek at Sioux Falls (gage site AGCS2) reached the highest stage on record of 3.60 feet above flood stage on September 14. Water inundated 60th Street North for the first time and caused minor damage to the bridge over Silver Creek. The city of Renner suffered extensive flooding with water inundating several homes and causing evacuation of seven residents.