A boundary oriented southwest to northeast slowly made its way into and across Iowa from the northwest through the 19th and early into the 20th.  The boundary generally stalled over central Iowa mid morning and into the evening, allowing storms to initiate and train over the same areas much of the day before becoming more progressive later.  Resulting issues were primarily heavy rainfall in excess of 2 inches, along with a couple of severe wind reports and a flash flood report.

Heavy Rain in BUTLER, IOWA
From 19-AUG-16 11:30:00 to 19-AUG-16 12:06:00 (CST-6)
Location: NEW HARTFORD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser reported gravel roads under low water, several large puddles in town and minor blacktop street flooding.  Duration of the heaviest rainfall was about 20 minutes.

Thunderstorm Wind in STORY, IOWA
From 19-AUG-16 18:10:00 to 19-AUG-16 18:10:00 (CST-6)
Location: NEVADA
Magnitude: 56.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported at least two large trees down in Nevada.  Time estimated from radar.

Flash Flood in WEBSTER, IOWA
From 19-AUG-16 18:30:00 to 19-AUG-16 22:30:00 (CST-6)
Location: VINCENT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported flash flooding making Elm Street impassable.  Time estimated by radar.

Heavy Rain in WRIGHT, IOWA
From 19-AUG-16 08:30:00 to 19-AUG-16 12:45:00 (CST-6)
Location: EAGLE GROVE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported heavy rainfall of 3.51 inches.

Thunderstorm Wind in HANCOCK, IOWA
From 19-AUG-16 14:30:00 to 19-AUG-16 14:30:00 (CST-6)
Location: DENHART
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported 50 to 60 mph winds with small hail stones about the size of dimes. Winds lasted roughly 3 to 4 minutes.

Heavy Rain in GRUNDY, IOWA
From 19-AUG-16 08:00:00 to 20-AUG-16 00:40:00 (CST-6)
Location: STOUT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 3.25 from morning and evening rainfalls.

Heavy Rain in HARDIN, IOWA
From 19-AUG-16 06:00:00 to 20-AUG-16 06:00:00 (CST-6)
Location: IOWA FALLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Iowa Falls AWOS recorded 2.20 inches of heavy rainfall over last 24 hours.

Heavy Rain in BUTLER, IOWA
From 19-AUG-16 17:00:00 to 20-AUG-16 00:30:00 (CST-6)
Location: ARBOR HILL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 2.2 inches.

Heavy Rain in HARDIN, IOWA
From 19-AUG-16 06:00:00 to 20-AUG-16 06:00:00 (CST-6)
Location: IOWA FALLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.30 inches over the last 24 hours.

Heavy Rain in STORY, IOWA
From 19-AUG-16 06:00:00 to 20-AUG-16 06:00:00 (CST-6)
Location: STORY CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.40 inches over the last 24 hours.

Heavy Rain in STORY, IOWA
From 19-AUG-16 06:00:00 to 20-AUG-16 06:00:00 (CST-6)
Location: ZEARING
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.78 inches over the last 24 hours.

Heavy Rain in BUTLER, IOWA
From 19-AUG-16 06:00:00 to 20-AUG-16 06:00:00 (CST-6)
Location: APLINGTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.92 inches over the last 24 hours.

Heavy Rain in WARREN, IOWA
From 19-AUG-16 06:00:00 to 20-AUG-16 06:00:00 (CST-6)
Location: HARTFORD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.97 inches over the last 24 hours.

Heavy Rain in BUTLER, IOWA
From 19-AUG-16 06:00:00 to 20-AUG-16 06:00:00 (CST-6)
Location: PARKERSBURG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 3.02 inches over the last 24 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-16 06:00:00 to 20-AUG-16 06:00:00 (CST-6)
Location: (FOD)FT DODGE MUNI A
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Fort Dodge Airport measured 3.23 inches over the last 24 hours.

Heavy Rain in HARDIN, IOWA
From 19-AUG-16 06:00:00 to 20-AUG-16 06:00:00 (CST-6)
Location: ELDORA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 3.38 inches over the last 24 hours.

Heavy Rain in FRANKLIN, IOWA
From 19-AUG-16 08:00:00 to 20-AUG-16 08:00:00 (CST-6)
Location: LATIMER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.20 inches over the last 24 hours.

Thunderstorm Wind in HANCOCK, IOWA
From 19-AUG-16 14:30:00 to 19-AUG-16 14:34:00 (CST-6)
Location: DENHART
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime size hail also reported. Lasted roughly 3 to 4 minutes.

Hail in BUTLER, IOWA
From 19-AUG-16 11:47:00 to 19-AUG-16 11:47:00 (CST-6)
Location: NEW HARTFORD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Fifty mph winds were observed as well.