A slow moving cold front entered the state and produced heavy rainfall across a large portion of central Iowa.  The front eventually stalled, and transitioned to a northward moving warm front the next day.  Rainfall totals were generally in excess of 2 inches, with the largest reports in excess of 5 inches, resulting in some localized flash flooding.  In addition to the heavy rainfall, a lone severe hail report came early in the event.

Heavy Rain in CARROLL, IOWA
From 06-SEP-15 17:00:00 to 06-SEP-15 18:25:00 (CST-6)
Location: LIDDERDALE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 2.70 inches storm total thus far.

Heavy Rain in GREENE, IOWA
From 06-SEP-15 18:34:00 to 06-SEP-15 19:04:00 (CST-6)
Location: DANA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 1.50 inches over the last 30 minutes via an electronic gauge.

Heavy Rain in CARROLL, IOWA
From 06-SEP-15 19:00:00 to 06-SEP-15 20:00:00 (CST-6)
Location: COON RAPIDS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Official NWS observation from Coon Rapids LARC of 3.2 inches of heavy rainfall from approximately 8pm to 9pm.

Heavy Rain in GREENE, IOWA
From 06-SEP-15 18:30:00 to 06-SEP-15 19:53:00 (CST-6)
Location: GRAND JCT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported heavy rainfall of 3.04 inches since 7:30pm via an electronic gauge.

Heavy Rain in CARROLL, IOWA
From 06-SEP-15 19:00:00 to 06-SEP-15 21:00:00 (CST-6)
Location: COON RAPIDS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Official NWS Observation from the Coon Rapids LARC of 4.7 inches of heavy rainfall over the last 2 hours.

Heavy Rain in CARROLL, IOWA
From 06-SEP-15 18:30:00 to 06-SEP-15 22:00:00 (CST-6)
Location: COON RAPIDS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet site recorded heavy storm total rainfall of 5.70 inches.  End time based on observations.

Heavy Rain in CARROLL, IOWA
From 06-SEP-15 17:30:00 to 07-SEP-15 00:00:00 (CST-6)
Location: CARROLL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported storm total heavy rainfall of 2.95 inches, with approximately 2.01 inches in a 30 minute span.  End time estimated via radar.

Heavy Rain in APPANOOSE, IOWA
From 07-SEP-15 01:30:00 to 07-SEP-15 06:00:00 (CST-6)
Location: CENTERVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall storm total of 2.64 inches so far.

Heavy Rain in DALLAS, IOWA
From 06-SEP-15 19:30:00 to 07-SEP-15 04:00:00 (CST-6)
Location: PERRY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

AWOS recorded heavy rainfall storm total of 3.36 inches at the Perry airport.

Heavy Rain in CARROLL, IOWA
From 06-SEP-15 17:00:00 to 06-SEP-15 22:00:00 (CST-6)
Location: CARROLL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

AWOS recorded storm total heavy rainfall of 2.67 inches at the Carroll airport.  End time based on observations.

Heavy Rain in APPANOOSE, IOWA
From 07-SEP-15 00:30:00 to 07-SEP-15 06:20:00 (CST-6)
Location: GRIFFINSVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported storm total heavy rainfall of 3.50 inches so far.

Heavy Rain in GREENE, IOWA
From 06-SEP-15 16:30:00 to 06-SEP-15 22:00:00 (CST-6)
Location: JEFFERSON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported heavy rainfall of 2.45 inches at 7am.  Actual end time radar estimated.

Heavy Rain in TAYLOR, IOWA
From 06-SEP-15 22:30:00 to 07-SEP-15 06:00:00 (CST-6)
Location: BLOCKTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported storm total heavy rainfall of 3.00 inches.

Heavy Rain in DALLAS, IOWA
From 06-SEP-15 20:00:00 to 07-SEP-15 03:00:00 (CST-6)
Location: WOODWARD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet recorded heavy rainfall of 3.02 inches.  End time based on radar.

Heavy Rain in APPANOOSE, IOWA
From 07-SEP-15 01:00:00 to 07-SEP-15 06:00:00 (CST-6)
Location: DARBYVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet recorded heavy rainfall of 3.79 inches storm total.

Heavy Rain in LUCAS, IOWA
From 07-SEP-15 00:30:00 to 07-SEP-15 06:00:00 (CST-6)
Location: RUSSELL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet recorded heavy rainfall of 2.38 inches storm total.

Heavy Rain in APPANOOSE, IOWA
From 07-SEP-15 01:30:00 to 07-SEP-15 06:00:00 (CST-6)
Location: SEDAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet recorded heavy rainfall of 2.64 inches storm total so far.

Heavy Rain in MARION, IOWA
From 06-SEP-15 23:00:00 to 07-SEP-15 04:00:00 (CST-6)
Location: KNOXVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

AWOS recorded heavy rainfall of 2.38 inches storm total measured at the Knoxville airport.

Heavy Rain in STORY, IOWA
From 06-SEP-15 20:00:00 to 07-SEP-15 04:00:00 (CST-6)
Location: SHIPLEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall storm total of 2.07 inches.  End time based on radar.

Heavy Rain in MARION, IOWA
From 06-SEP-15 23:00:00 to 07-SEP-15 06:00:00 (CST-6)
Location: KNOXVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.95 inches storm total.

Heavy Rain in BOONE, IOWA
From 06-SEP-15 19:00:00 to 07-SEP-15 02:00:00 (CST-6)
Location: BOONE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall storm total of 2.03 inches.  End time based on radar.

Heavy Rain in APPANOOSE, IOWA
From 07-SEP-15 01:00:00 to 07-SEP-15 06:30:00 (CST-6)
Location: DARBYVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 4.50 inches storm total.

Heavy Rain in DALLAS, IOWA
From 06-SEP-15 19:30:00 to 07-SEP-15 03:00:00 (CST-6)
Location: PERRY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall storm total of 3.74 inches.  End time based on radar.

Heavy Rain in MARION, IOWA
From 06-SEP-15 23:00:00 to 07-SEP-15 06:00:00 (CST-6)
Location: PELLA MUNI ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.29 inches storm total.

Heavy Rain in TAYLOR, IOWA
From 06-SEP-15 23:00:00 to 07-SEP-15 06:00:00 (CST-6)
Location: BEDFORD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall storm total of 3.36 inches.

Heavy Rain in MARION, IOWA
From 06-SEP-15 23:30:00 to 07-SEP-15 07:30:00 (CST-6)
Location: HARVEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 2.25 inches.

Heavy Rain in GUTHRIE, IOWA
From 06-SEP-15 19:15:00 to 07-SEP-15 01:00:00 (CST-6)
Location: BAGLEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS report of storm total heavy rainfall of 6.25 inches.  End time estimated from radar.

Heavy Rain in BOONE, IOWA
From 06-SEP-15 19:15:00 to 07-SEP-15 02:00:00 (CST-6)
Location: OGDEN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS report of storm total heavy rainfall of 2.54 inches.  End time based on radar.

Heavy Rain in BOONE, IOWA
From 06-SEP-15 20:00:00 to 07-SEP-15 02:00:00 (CST-6)
Location: MADRID
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported heavy rainfall storm total of 2.51 inches.  End time estimated from radar.

Heavy Rain in BOONE, IOWA
From 06-SEP-15 19:00:00 to 07-SEP-15 02:00:00 (CST-6)
Location: LOGANSPORT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS report of heavy rainfall storm total of 2.45 inches.  End time estimated by radar.

Heavy Rain in GREENE, IOWA
From 06-SEP-15 17:30:00 to 06-SEP-15 23:00:00 (CST-6)
Location: CHURDAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS report of heavy rainfall storm total of 2.33 inches.  End time estimated by radar.

Heavy Rain in DALLAS, IOWA
From 06-SEP-15 19:30:00 to 06-SEP-15 23:00:00 (CST-6)
Location: DAWSON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall storm total of 4.23 inches.  End time estimated by radar.

Heavy Rain in CARROLL, IOWA
From 06-SEP-15 18:00:00 to 06-SEP-15 23:00:00 (CST-6)
Location: RALSTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported heavy rainfall of 3.90 inches.  End time radar estimated.

Heavy Rain in BOONE, IOWA
From 06-SEP-15 19:00:00 to 07-SEP-15 03:00:00 (CST-6)
Location: BERKLEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported heavy rainfall storm total of 4.50 inches.  End time radar estimated.

Heavy Rain in APPANOOSE, IOWA
From 07-SEP-15 01:00:00 to 07-SEP-15 08:00:00 (CST-6)
Location: FORBUSH
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall storm total of 3.15 inches.  End time radar estimated.

Flood in DALLAS, IOWA
From 07-SEP-15 09:02:00 to 08-SEP-15 04:15:00 (CST-6)
Location: ADEL
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 50.00K
Reported by: Official NWS Observations

The North Raccoon River at Perry crested a second time this month at 15.68 feet on 07 September 2015 at 4:30 PM CDT.

Flash Flood in GREENE, IOWA
From 06-SEP-15 21:35:00 to 07-SEP-15 01:15:00 (CST-6)
Location: SCRANTON
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager reported water E57 and E63 in southern portions of the county.

Flash Flood in RINGGOLD, IOWA
From 07-SEP-15 00:26:00 to 07-SEP-15 06:15:00 (CST-6)
Location: MT AYR
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Gravel road was nearly washed out with the gravel washing onto Hwy 169 north of Mt. Ayr.

Flood in DALLAS, IOWA
From 07-SEP-15 16:00:00 to 08-SEP-15 13:00:00 (CST-6)
Location: PERRY MUNI ARPT
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Dallas County Sheriff reported that 160th and H Ave was down to 1 lane because of water over the road.

Thunderstorm Wind in CARROLL, IOWA
From 06-SEP-15 18:20:00 to 06-SEP-15 18:20:00 (CST-6)
Location: RALSTON
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Winds estimated greater than 60 mph with 6 to 8 inch branches down. Some of the branches were older.

Flash Flood in CARROLL, IOWA
From 06-SEP-15 18:28:00 to 07-SEP-15 00:55:00 (CST-6)
Location: CARROLL
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy rainfall of 2 inches in about 45 minutes. Street flooding in Carroll was reported with water up to the doors of cars.

Flash Flood in CARROLL, IOWA
From 06-SEP-15 18:47:00 to 07-SEP-15 00:55:00 (CST-6)
Location: GLIDDEN
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported roadside ditches full and local roads in Glidden with 6 to 10 inches of standing water.

Flash Flood in CARROLL, IOWA
From 06-SEP-15 18:53:00 to 07-SEP-15 00:55:00 (CST-6)
Location: GLIDDEN
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported water running over Highway 30 in multiple locations about a half mile west of Glidden.

Flash Flood in CARROLL, IOWA
From 06-SEP-15 21:21:00 to 07-SEP-15 01:15:00 (CST-6)
Location: COON RAPIDS
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager reported water over Highway 141 near Coon Rapids, and that it is not a place that normally flash floods.

Flash Flood in GUTHRIE, IOWA
From 06-SEP-15 21:21:00 to 07-SEP-15 02:15:00 (CST-6)
Location: BAYARD
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager reported water flowing over Highway 141 east of Bayard between Maple and Locust Avenues.

Flash Flood in GUTHRIE, IOWA
From 06-SEP-15 20:57:00 to 07-SEP-15 02:15:00 (CST-6)
Location: BAYARD
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager reported Highway 25 underpass flooded in the town of Bayard.

Flash Flood in GUTHRIE, IOWA
From 06-SEP-15 21:35:00 to 07-SEP-15 02:15:00 (CST-6)
Location: BAYARD
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager reported Highway 141 closed southeast of Coon Rapids, and may need to be closed near Bagley shortly.  County Road P18 closed north of Bagley.  Authorities are limiting access to Bayard.  Extensive flooding across northern Guthrie county.

Flash Flood in GREENE, IOWA
From 06-SEP-15 21:46:00 to 07-SEP-15 01:15:00 (CST-6)
Location: COOPER
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager reported water over 330th street near J avenue just north of Bagley.

Flash Flood in GUTHRIE, IOWA
From 06-SEP-15 21:46:00 to 07-SEP-15 01:15:00 (CST-6)
Location: BAGLEY
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager reported water over P18 north of Bagley, along the Greene and Guthrie county line.

Flash Flood in GUTHRIE, IOWA
From 07-SEP-15 00:21:00 to 07-SEP-15 02:15:00 (CST-6)
Location: BAGLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager reported Highway 141 closed near Bagley.  Highway 141 now nearly impassable from Highway 4 to Coon Rapids.

Hail in CALHOUN, IOWA
From 06-SEP-15 17:10:00 to 06-SEP-15 17:10:00 (CST-6)
Location: POMEROY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported one inch hail.

Flash Flood in GREENE, IOWA
From 06-SEP-15 21:46:00 to 07-SEP-15 01:15:00 (CST-6)
Location: RALSTON
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager reported water over 210th street near Highway 30.

Flash Flood in GUTHRIE, IOWA
From 07-SEP-15 00:26:00 to 07-SEP-15 02:15:00 (CST-6)
Location: BAYARD
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Department of Highways

Iowa DOT reported Highway 25 closed due to flooding near Bayard with detour routing traffic around town.

Flood in GUTHRIE, IOWA
From 07-SEP-15 02:27:00 to 08-SEP-15 13:00:00 (CST-6)
Location: BAYARD
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager reported widespread flooding across northern Guthrie County.  All paved roads north of Highway 141 west of Highway 4 to Coon Rapids are closed.  Water still rising in northern Bagley, backing up from Mosquito Creek.  Springbrook State Park has been evacuated.

Hail in CALHOUN, IOWA
From 06-SEP-15 17:05:00 to 06-SEP-15 17:05:00 (CST-6)
Location: POMEROY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported one inch hail.

Hail in HANCOCK, IOWA
From 06-SEP-15 17:14:00 to 06-SEP-15 17:14:00 (CST-6)
Location: DENHART
Magnitude: 1.25 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported hail about the size as a 50 cent piece.

Thunderstorm Wind in CALHOUN, IOWA
From 06-SEP-15 17:20:00 to 06-SEP-15 17:20:00 (CST-6)
Location: YETTER
Magnitude: 43.00 EG
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Trained Spotter

Trained spotter reported tree damage to an old maple tree, which was partially rotted.  Winds estimated at over 50 mph.  Torrential rainfall also present at time of rainfall.