A cold frontal boundary dropped south into Iowa and stalled out just south of the state.  Rounds of thunderstorms moved east-northeast across the state as a series of waves moved along the front.  Heavy rainfall resulted during the early morning of the 26th, then again during the evening of the 26th into the morning of the 27th.  A band of 3 to as much as 7 inches of rain fell from south central into east central Iowa.  Conditions had been relatively dry prior to the rain and as a result, most of the flooding was limited to urban and small stream flooding.  General flooding occurred in Tama County in several locations.  Water was reported over both state and U.S. highways for several hours.  Flash flooding occurred in Wayne County with several roads covered with water flowing car bumper deep.  Reports from the county indicated that there was extensive road damage with at least 50 washouts.

Heavy Rain in POWESHIEK, IOWA
From 27-AUG-09 06:00:00 to 27-AUG-09 06:00:00 (CST-6)
Location: GRINNELL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall of 4.18 inches was reported.

Heavy Rain in MARION, IOWA
From 27-AUG-09 06:00:00 to 27-AUG-09 06:00:00 (CST-6)
Location: PELLA MUNI ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall amount of 3.26 inches was reported.

Heavy Rain in POWESHIEK, IOWA
From 27-AUG-09 06:00:00 to 27-AUG-09 06:00:00 (CST-6)
Location: BROOKLYN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall amount of 3.19 inches was reported.

Heavy Rain in BOONE, IOWA
From 26-AUG-09 07:30:00 to 26-AUG-09 07:30:00 (CST-6)
Location: MADRID
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amount of 2.25 inches was reported.

Heavy Rain in GREENE, IOWA
From 26-AUG-09 09:15:00 to 26-AUG-09 09:15:00 (CST-6)
Location: COOPER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall amount of 5.50 inches was reported.

Heavy Rain in DAVIS, IOWA
From 27-AUG-09 04:36:00 to 27-AUG-09 04:36:00 (CST-6)
Location: PARIS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall of 3.00 inches was reported.

Heavy Rain in DECATUR, IOWA
From 27-AUG-09 06:00:00 to 27-AUG-09 06:00:00 (CST-6)
Location: LEON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall amount of 4.07 inches was reported.

Heavy Rain in BOONE, IOWA
From 26-AUG-09 05:48:00 to 26-AUG-09 05:48:00 (CST-6)
Location: BERKLEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A rainfall amount of 2.20 inches was reported.

Heavy Rain in GREENE, IOWA
From 26-AUG-09 06:10:00 to 26-AUG-09 06:10:00 (CST-6)
Location: COOPER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall of 4.50 inches was reported. There was ponding of water on roads, but no erosion or flooding problems.

Heavy Rain in AUDUBON, IOWA
From 26-AUG-09 06:50:00 to 26-AUG-09 06:50:00 (CST-6)
Location: FISCUS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall amount of 4.00 inches was reported.

Heavy Rain in AUDUBON, IOWA
From 26-AUG-09 05:47:00 to 26-AUG-09 05:47:00 (CST-6)
Location: GRAY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A rainfall amount of 4.50 inches was reported.

Heavy Rain in WAPELLO, IOWA
From 27-AUG-09 06:00:00 to 27-AUG-09 06:00:00 (CST-6)
Location: OTTUMWA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Rainfall amount of 3.33 inches was reported.

Heavy Rain in DECATUR, IOWA
From 27-AUG-09 06:00:00 to 27-AUG-09 06:00:00 (CST-6)
Location: LAMONI
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall of 3.00 inches was reported.

Heavy Rain in TAMA, IOWA
From 27-AUG-09 06:00:00 to 27-AUG-09 06:00:00 (CST-6)
Location: CLUTIER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall amount of 3.15 inches was reported.

Heavy Rain in WAYNE, IOWA
From 27-AUG-09 06:00:00 to 27-AUG-09 06:00:00 (CST-6)
Location: ALLERTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall amount of 6.55 inches was reported over the past 24 hours.

Flood in TAMA, IOWA
From 27-AUG-09 09:15:00 to 27-AUG-09 22:31:00 (CST-6)
Location: CLUTIER
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Highway E29 three quarters of a miles west of Highway V18 had water over the road from Salt Creek.

Flood in TAMA, IOWA
From 27-AUG-09 14:40:00 to 27-AUG-09 22:31:00 (CST-6)
Location: MONTOUR
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water was reported over the road near 330th St and G Ave.

Flood in TAMA, IOWA
From 27-AUG-09 16:51:00 to 27-AUG-09 22:31:00 (CST-6)
Location: IRVING
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

County Road E66 was flooded from just east of Chelsea to the county line.

Heavy Rain in WAYNE, IOWA
From 27-AUG-09 06:00:00 to 27-AUG-09 06:00:00 (CST-6)
Location: PROMISE CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Local TV station viewer reported 5.25 inches of rain in Promise City overnight through 7 AM this morning.

Heavy Rain in JASPER, IOWA
From 27-AUG-09 06:00:00 to 27-AUG-09 06:00:00 (CST-6)
Location: NEWTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall of 3.06 inches was reported.

Heavy Rain in CLARKE, IOWA
From 27-AUG-09 06:00:00 to 27-AUG-09 06:00:00 (CST-6)
Location: OSCEOLA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall amount of 3.89 inches was reported.

Flood in TAMA, IOWA
From 27-AUG-09 10:40:00 to 27-AUG-09 22:31:00 (CST-6)
Location: ELBERON
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Highway E44 reportedly had water over the road from Wolf Creek.

Flood in TAMA, IOWA
From 27-AUG-09 10:40:00 to 27-AUG-09 22:31:00 (CST-6)
Location: TAMA
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Highway E49 had water over the road near H Ave.

Flood in TAMA, IOWA
From 27-AUG-09 11:30:00 to 27-AUG-09 22:31:00 (CST-6)
Location: TAMA
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding was reported near Battleground Rd and Meskwaki Road.

Heavy Rain in WAPELLO, IOWA
From 27-AUG-09 06:00:00 to 27-AUG-09 06:00:00 (CST-6)
Location: OTTUMWA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Radio station in Ottumwa reported 3.5 inches of rain since noon the previous day.

Flash Flood in WAYNE, IOWA
From 26-AUG-09 20:30:00 to 26-AUG-09 23:59:00 (CST-6)
Location: BENTONVILLE
Flood cause: Heavy Rain
Property damage: 2.50M
Crop damage: 250.00K
Reported by: Emergency Manager

Emergency Manager reported flash flooding at several locations over the southwest half of Wayne County between 2030 and 2400 CDT. Several roads were closed due to high water rushing bumper deep.  Numerous basements were flooded in Corydon.