Storms initiated out in the Nebraska Panhandle area the night prior, translating eastward through the night across northern Nebraska and southern South Dakota.  As the storms approached and entered northern Iowa and southern Minnesota they strengthened, expanded in aerial coverage, and turned southward along the instability gradient.  The primary results of the storms were gusty winds and heavy rainfall.  The bulk of the rainfall occurred during the evening of the 15th, and tapered off in the early hours of the 16th.  A couple of high wind gust reports were received along with numerous heavy rainfall amounts between 2 and 3 inches.

Heavy Rain in UNION, IOWA
From 15-SEP-16 23:00:00 to 16-SEP-16 03:30:00 (CST-6)
Location: LORIMOR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.26 inches.

Heavy Rain in PALO ALTO, IOWA
From 15-SEP-16 04:30:00 to 16-SEP-16 03:00:00 (CST-6)
Location: EMMETSBURG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.41 inches.

Heavy Rain in HANCOCK, IOWA
From 15-SEP-16 16:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: BRITT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.10 inches.

Heavy Rain in SAC, IOWA
From 15-SEP-16 16:30:00 to 16-SEP-16 03:00:00 (CST-6)
Location: SAC CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.55 inches.

Heavy Rain in POLK, IOWA
From 15-SEP-16 21:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: ASHAWA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

NWS employee reported heavy rainfall of 2.07 inches.

Heavy Rain in POLK, IOWA
From 15-SEP-16 21:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: ENTERPRISE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.83 inches.

Heavy Rain in KOSSUTH, IOWA
From 15-SEP-16 04:30:00 to 16-SEP-16 03:30:00 (CST-6)
Location: SWEA CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.08 inches.

Heavy Rain in WARREN, IOWA
From 15-SEP-16 23:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: NEW VIRGINIA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported heavy rainfall of 3.80 inches.

Heavy Rain in GREENE, IOWA
From 15-SEP-16 18:30:00 to 16-SEP-16 04:00:00 (CST-6)
Location: PATON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 2.50 inches from storms last night.

Heavy Rain in HARDIN, IOWA
From 15-SEP-16 18:30:00 to 16-SEP-16 04:00:00 (CST-6)
Location: HUBBARD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public called in heavy rainfall report of 1.72 inches from storms last night.

Heavy Rain in CLARKE, IOWA
From 15-SEP-16 23:30:00 to 16-SEP-16 03:30:00 (CST-6)
Location: MURRAY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter called in heavy rainfall report of 3.10 inches from storms last night.

Heavy Rain in WARREN, IOWA
From 15-SEP-16 22:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: HARTFORD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 2.36 inches.

Heavy Rain in WINNEBAGO, IOWA
From 15-SEP-16 16:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: FOREST CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 2.30 inches.

Heavy Rain in POLK, IOWA
From 15-SEP-16 21:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: ALTOONA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur radio report of heavy rainfall of 2.57 inches.

Hail in SAC, IOWA
From 15-SEP-16 16:29:00 to 15-SEP-16 16:29:00 (CST-6)
Location: NEMAHA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Numerous public reports of penny sized hail.

Hail in HARDIN, IOWA
From 15-SEP-16 17:52:00 to 15-SEP-16 17:52:00 (CST-6)
Location: IOWA FALLS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported nickel sized hail.

Thunderstorm Wind in CERRO GORDO, IOWA
From 15-SEP-16 17:10:00 to 15-SEP-16 17:10:00 (CST-6)
Location: MASON CITY
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported 58-66 mph wind gusts measured with a hand held anemometer.  Also reported several 2 inch diameter tree limbs down.

Thunderstorm Wind in BLACK HAWK, IOWA
From 15-SEP-16 19:03:00 to 15-SEP-16 19:03:00 (CST-6)
Location: (ALO)WATERLOO MUNI A
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Waterloo airport ASOS recorded 61 mph wind gusts.

Heavy Rain in ADAIR, IOWA
From 15-SEP-16 15:00:00 to 16-SEP-16 03:00:00 (CST-6)
Location: ADAIR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Automated LARC recorded heavy rainfall of 3.2 inches over the previous 12 hours.

Flash Flood in CALHOUN, IOWA
From 15-SEP-16 18:30:00 to 15-SEP-16 22:50:00 (CST-6)
Location: ROCKWELL CITY
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported a car stalled/stranded after driving through flooded roads.  Delayed report.

Heavy Rain in CRAWFORD, IOWA
From 15-SEP-16 18:00:00 to 16-SEP-16 03:00:00 (CST-6)
Location: DENISON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 2.48 inches.

Heavy Rain in CLARKE, IOWA
From 15-SEP-16 11:30:00 to 16-SEP-16 03:30:00 (CST-6)
Location: MURRAY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 3.05 inches.

Heavy Rain in EMMET, IOWA
From 15-SEP-16 13:00:00 to 16-SEP-16 03:00:00 (CST-6)
Location: ESTHERVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Estherville ASOS recorded heavy rainfall of 2.59 inches.

Heavy Rain in STORY, IOWA
From 15-SEP-16 19:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: AMES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Ames airport ASOS recorded heavy rainfall of 2.16 inches.

Heavy Rain in MARSHALL, IOWA
From 15-SEP-16 19:30:00 to 16-SEP-16 04:30:00 (CST-6)
Location: MARSHALLTOWN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Marshalltown airport ASOS recorded heavy rainfall of 2.02 inches.

Heavy Rain in POCAHONTAS, IOWA
From 15-SEP-16 16:00:00 to 16-SEP-16 03:00:00 (CST-6)
Location: POCAHONTAS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.95 inches.

Heavy Rain in KOSSUTH, IOWA
From 15-SEP-16 15:00:00 to 16-SEP-16 03:30:00 (CST-6)
Location: ALGONA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.70 inches.

Heavy Rain in WINNEBAGO, IOWA
From 15-SEP-16 16:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: FOREST CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.25 inches.

Heavy Rain in WINNEBAGO, IOWA
From 15-SEP-16 16:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: LAKE MILLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.11 inches.

Heavy Rain in AUDUBON, IOWA
From 15-SEP-16 20:00:00 to 16-SEP-16 03:00:00 (CST-6)
Location: AUDUBON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 3.19 inches.

Heavy Rain in CARROLL, IOWA
From 15-SEP-16 19:00:00 to 16-SEP-16 03:00:00 (CST-6)
Location: CARROLL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.64 inches.

Heavy Rain in CARROLL, IOWA
From 15-SEP-16 20:00:00 to 16-SEP-16 03:00:00 (CST-6)
Location: COON RAPIDS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.9 inches.

Heavy Rain in CRAWFORD, IOWA
From 15-SEP-16 18:00:00 to 16-SEP-16 02:30:00 (CST-6)
Location: DENISON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.30 inches.

Heavy Rain in GUTHRIE, IOWA
From 15-SEP-16 21:00:00 to 16-SEP-16 03:00:00 (CST-6)
Location: GUTHRIE CENTER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 3.11 inches.

Heavy Rain in CALHOUN, IOWA
From 15-SEP-16 17:30:00 to 16-SEP-16 03:30:00 (CST-6)
Location: ROCKWELL CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.78 inches.

Heavy Rain in BOONE, IOWA
From 15-SEP-16 19:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: BOONE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.19 inches.

Heavy Rain in GRUNDY, IOWA
From 15-SEP-16 19:30:00 to 16-SEP-16 04:30:00 (CST-6)
Location: CONRAD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.05 inches.

Heavy Rain in MARSHALL, IOWA
From 15-SEP-16 20:30:00 to 16-SEP-16 05:00:00 (CST-6)
Location: GILMAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.20 inches.

Heavy Rain in HARDIN, IOWA
From 15-SEP-16 18:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: IOWA FALLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.31 inches.

Heavy Rain in HAMILTON, IOWA
From 15-SEP-16 18:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: JEWELL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.72 inches.

Heavy Rain in STORY, IOWA
From 15-SEP-16 20:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: MAXWELL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.50 inches.

Heavy Rain in DALLAS, IOWA
From 15-SEP-16 20:00:00 to 16-SEP-16 03:30:00 (CST-6)
Location: PERRY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.57 inches.

Heavy Rain in TAMA, IOWA
From 15-SEP-16 20:30:00 to 16-SEP-16 05:00:00 (CST-6)
Location: TOLEDO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.02 inches.

Heavy Rain in STORY, IOWA
From 15-SEP-16 18:30:00 to 16-SEP-16 04:00:00 (CST-6)
Location: ZEARING
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 3.76 inches.

Heavy Rain in ADAIR, IOWA
From 15-SEP-16 19:00:00 to 16-SEP-16 02:30:00 (CST-6)
Location: ADAIR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 3.20 inches.

Heavy Rain in CASS, IOWA
From 15-SEP-16 19:30:00 to 16-SEP-16 02:30:00 (CST-6)
Location: ATLANTIC
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.49 inches.

Heavy Rain in ADAIR, IOWA
From 15-SEP-16 20:00:00 to 16-SEP-16 02:30:00 (CST-6)
Location: GREENFIELD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.30 inches.

Heavy Rain in CASS, IOWA
From 15-SEP-16 23:00:00 to 16-SEP-16 04:00:00 (CST-6)
Location: MASSENA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 2.40 inches.