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 O'BRIEN, IOWA
From 20-SEP-18 01:00:00 to 20-SEP-18 10:00:00 (CST-6)
Location: SHELDON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Widespread rainfall from September 18-20 totaled generally 6 to 10 inches, resulting in minor flooding of agricultural land. The Little Floyd River near Sanborn (gage site LFSI4) crested 2.4 feet above flood stage on September 20.

Flood in SIOUX, IOWA
From 20-SEP-18 06:00:00 to 22-SEP-18 09:00:00 (CST-6)
Location: STRUBLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Widespread rainfall from September 18-20 totaled generally 5 to 10 inches, resulting in record flooding. Numerous county roads were inundated with flood water in southern Sioux and northern Plymouth counties near Struble and Maurice. The West Branch of the Floyd River near Struble (gage site STUI4) crested at a record 2.2 feet above flood stage on September 21.

Flood in PLYMOUTH, IOWA
From 20-SEP-18 06:00:00 to 22-SEP-18 09:00:00 (CST-6)
Location: STRUBLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Widespread rainfall from September 18-20 totaled generally 5 to 10 inches, resulting in record flooding. Numerous county roads were inundated with flood water in southern Sioux and northern Plymouth counties near Struble and Maurice. The West Branch of the Floyd River near Struble (gage site STUI4) crested at a record 2.2 feet above flood stage on September 21.

Flood in O'BRIEN, IOWA
From 20-SEP-18 06:00:00 to 21-SEP-18 23:00:00 (CST-6)
Location: RITTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Widespread rainfall from September 18-20 totaled generally 5 to 10 inches, resulting in moderate flooding. Most farmland within 1000 feet of the river was inundated as the Floyd River at Sheldon (gage site SHLI4) crested at 2.5 feet above flood stage on September 20.

Flood in SIOUX, IOWA
From 20-SEP-18 06:00:00 to 21-SEP-18 23:00:00 (CST-6)
Location: SHELDON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Widespread rainfall from September 18-20 totaled generally 5 to 10 inches, resulting in moderate flooding. Most farmland within 1000 feet of the river was inundated as the Floyd River at Sheldon (gage site SHLI4) crested at 2.5 feet above flood stage on September 20.

Flood in O'BRIEN, IOWA
From 20-SEP-18 03:00:00 to 23-SEP-18 23:00:00 (CST-6)
Location: PHILBY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Widespread rainfall from September 18-20 totaled generally 5 to 10 inches, resulting in record flooding. State Highway 60 and 480th Street were closed due to high water, with the entire flood plain and numerous county roads inundated with flood water. The Floyd River at Alton (gage site ALTI4) crested at a record 10.0 feet above flood stage on September 20.

Flood in PLYMOUTH, IOWA
From 20-SEP-18 23:00:00 to 23-SEP-18 19:00:00 (CST-6)
Location: STRUBLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Widespread rainfall from September 18-20 totaled generally 5 to 10 inches, resulting in record flooding. Flood waters flowed across State Highway 3 for the first time on record, and portions of State Highway 60 along with numerous county roads suffered inundation of flood waters. The Floyd River at Le Mars (gage site LMRI4) crested at a record 6.4 feet above flood stage on September 21.

Flood in PLYMOUTH, IOWA
From 21-SEP-18 04:00:00 to 23-SEP-18 03:00:00 (CST-6)
Location: WEST LE MARS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Widespread rainfall upstream in the Floyd River basin from September 18-20 totaled generally 5 to 10 inches, with 2 to 5 inches across Plymouth County, resulting in major flooding. County road C44 was inundated with water, which also impacted a few properties on the east edge of Merrill. The Floyd River at Merrill (gage site MRLI4) crested at 5.0 feet above flood stage on September 21.

Flood in PLYMOUTH, IOWA
From 22-SEP-18 07:00:00 to 23-SEP-18 01:00:00 (CST-6)
Location: HINTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Widespread rainfall from September 18-20 totaled generally 2 to 5 inches, resulting in minor flooding. Impacts were generally limited to flooding of crop and pasture lands along the river as the Floyd River at James (gage site JMEI4) crested at 1.7 feet above flood stage on September 22, which was the fourth highest crest on record.

Flood in WOODBURY, IOWA
From 22-SEP-18 07:00:00 to 23-SEP-18 01:00:00 (CST-6)
Location: LEEDS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Widespread rainfall from September 18-20 totaled generally 2 to 5 inches, resulting in minor flooding. Impacts were generally limited to flooding of crop and pasture lands along the river as the Floyd River at James (gage site JMEI4) crested at 1.7 feet above flood stage on September 22, which was the fourth highest crest on record.