A nearly stationary west to east frontal boundary was located across Nebraska and Iowa for several days. With an extremely moist atmosphere featuring near record precipitable water in place, several weak disturbances resulted in prolific rainfall from 5 to as much as 10 inches.

Flood in DICKINSON, IOWA
From 21-SEP-18 00:00:00 to 24-SEP-18 13:00:00 (CST-6)
Location: MONTGOMERY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in widespread flooding. Crop and pasture land between Lake Park and Montgomery was inundated as the West Fork of the Little Sioux River near Lake Park (gage site LPRI4) crested at 0.5 foot above flood stage on September 23.

Flood in CLAY, IOWA
From 20-SEP-18 07:00:00 to 23-SEP-18 10:00:00 (CST-6)
Location: EVERLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in widespread flooding. Crop and pasture land near Everly was inundated as the Ocheyedan River near Everly (gage site OREI4) crested at 1.2 feet above flood stage on September 22.

Flood in CLAY, IOWA
From 20-SEP-18 01:00:00 to 27-SEP-18 13:00:00 (CST-6)
Location: EVERLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in major flooding. Several county roads and widespread agricultural lands west of Spencer were inundated as the Ocheyedan River near Spencer (gage site SPOI4) crested at 4.7 feet above flood stage on September 21.

Flood in O'BRIEN, IOWA
From 20-SEP-18 01:00:00 to 24-SEP-18 12:00:00 (CST-6)
Location: SUTHERLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in major flooding. 470th Street as well as significant crop and pasture land was inundated as Waterman Creek near Sutherland (gage site SWCI4) crested at 7.2 feet above flood stage on September 20.

Flood in CLAY, IOWA
From 20-SEP-18 07:00:00 to 21-SEP-18 20:00:00 (CST-6)
Location: ROSSIE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in moderate flooding. Crop and pasture land was inundated as Willow Creek near Cornell (gage site CWCI4) crested at 4.2 feet above flood stage on September 20.

Flood in DICKINSON, IOWA
From 22-SEP-18 11:00:00 to 27-SEP-18 04:00:00 (CST-6)
Location: MONTGOMERY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in widespread flooding. Crop and pasture land was inundated as well as 170th Avenue north of State Highway 9 as the Little Sioux River near Montgomery (gage site MLSI4) crested in minor flood at 1.1 feet above flood stage on September 24.

Flood in DICKINSON, IOWA
From 20-SEP-18 01:00:00 to 30-SEP-18 23:59:00 (CST-6)
Location: MONTGOMERY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in major flooding. Significant crop and pasture land was flooded, and several roads were inundated including 170th Avenue south of State Highway 9, 190th Avenue near 240th St. and 180th Street between 170th and 190th Avenues. The Little Sioux River near Milford (gage site MIFI4) crested at 4.0 feet above flood stage on September 24. The river remained in minor flood at the end of the month.

Flood in CLAY, IOWA
From 20-SEP-18 01:00:00 to 30-SEP-18 23:59:00 (CST-6)
Location: FOSTORIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in major flooding. Significant crop and pasture land was flooded, and several roads were inundated including 170th Avenue south of State Highway 9, 190th Avenue near 240th St. and 180th Street between 170th and 190th Avenues. The Little Sioux River near Milford (gage site MIFI4) crested at 4.0 feet above flood stage on September 24.  The river remained in minor flood at the end of the month.

Flood in CLAY, IOWA
From 20-SEP-18 02:00:00 to 30-SEP-18 23:59:00 (CST-6)
Location: SPENCER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in major flooding.  Sections of West Park Street, 1st Street and 2nd Street were flooded, and water encroached into several businesses in the south part of Spencer near WalMart along highways 71 and 18. Water also covered portions of county road B-40 southeast of Spencer.  The Little Sioux River at Spencer (gage site SPWI4) crested at 6.6 feet above flood stage on September 21, and remained in minor flood state at the end of the month.

Flood in CLAY, IOWA
From 20-SEP-18 06:00:00 to 30-SEP-18 23:59:00 (CST-6)
Location: GREENVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in record flooding. Significant crop and pasture land was flooded, and city and county parks along the reach of the river were severely inundated. The Little Sioux River at Linn Grove (gage site LNNI4) crested at 5.9 feet above flood stage on September 22, the second record crest of the year. The river remained in minor flood at the end of the month.

Flood in BUENA VISTA, IOWA
From 20-SEP-18 06:00:00 to 30-SEP-18 23:59:00 (CST-6)
Location: SIOUX RAPIDS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in record flooding. Significant crop and pasture land was flooded, and city and county parks along the reach of the river were severely inundated. The Little Sioux River at Linn Grove (gage site LNNI4) crested at 5.9 feet above flood stage on September 22, the second record crest of the year. The river remained in minor flood at the end of the month.

Flood in O'BRIEN, IOWA
From 20-SEP-18 06:00:00 to 30-SEP-18 23:59:00 (CST-6)
Location: SUTHERLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in record flooding. Significant crop and pasture land was flooded, and city and county parks along the reach of the river were severely inundated. The Little Sioux River at Linn Grove (gage site LNNI4) crested at 5.9 feet above flood stage on September 22, the second record crest of the year. The river remained in minor flood at the end of the month.

Flood in O'BRIEN, IOWA
From 20-SEP-18 09:00:00 to 30-SEP-18 23:59:00 (CST-6)
Location: SUTHERLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in major flooding. Numerous roads accessing Cherokee were closed due to flooding, including U.S. Highway 59, old highway 5, east Main Street, and county roads C-38 and C-44. Many businesses in the south and southeast portions of Cherokee were flooded. The Little Sioux River at Cherokee (gage site CHKI4) crested at 10.0 feet above flood stage on September 21. The river remained in minor flood at the end of the month.

Flood in CHEROKEE, IOWA
From 20-SEP-18 09:00:00 to 30-SEP-18 23:59:00 (CST-6)
Location: LARRABEE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in major flooding. Numerous roads accessing Cherokee were closed due to flooding, including U.S. Highway 59, old highway 5, east Main Street, and county roads C-38 and C-44. Many businesses in the south and southeast portions of Cherokee were flooded. The Little Sioux River at Cherokee (gage site CHKI4) crested at 10.0 feet above flood stage on September 21. The river remained in minor flood at the end of the month.

Flood in CLAY, IOWA
From 21-SEP-18 05:00:00 to 30-SEP-18 23:59:00 (CST-6)
Location: EVERLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in moderate flooding. Significant crop and pasture land was flooded upstream of Spencer as the Little Sioux River above Spencer (gage site SPII4) crested at 2.6 feet above flood stage on September 22. The river remained in minor flood at the end of the month.

Flood in IDA, IOWA
From 21-SEP-18 20:00:00 to 28-SEP-18 03:00:00 (CST-6)
Location: HOLSTEIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in major flooding. Significant crop and pasture land was flooded, and several roads were inundated including State Highway 31 both north and south of Correctionville, as well as county roads D22, L36 and L27. Water reached several homes in the southern portions of Correctionville. The Little Sioux River at Correctionville (gage site CRRI4) crested at 5.3 feet above flood stage on September 24.

Flood in WOODBURY, IOWA
From 21-SEP-18 20:00:00 to 28-SEP-18 03:00:00 (CST-6)
Location: PIERSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rainfall throughout the Little Sioux Basin during the period of September 18-21 totaled generally 4 to 8 inches, resulting in major flooding. Significant crop and pasture land was flooded, and several roads were inundated including State Highway 31 both north and south of Correctionville, as well as county roads D22, L36 and L27. Water reached several homes in the southern portions of Correctionville. The Little Sioux River at Correctionville (gage site CRRI4) crested at 5.3 feet above flood stage on September 24.