An unstable airmass was in place over Iowa with CAPE over 2000 J/kg already by early in the morning.  Downdraft CAPE was quite high, in the 1000 to 1300 J/kg range, with 400 to 600 J/kg in the -10 to -30 C layer of the atmosphere.  The shear was quite weak, in the 25 to 35 kt range.  Deep moisture was in place with precipitable water values of 1.8 inches.  The LCL was quite low as well, in the 500 to 750 meter range.  There was little hail as the freezing level was quite high at 14,400 feet.  Strong thunderstorms developed in a north to south line across eastern Nebraska and western Iowa.  During the morning the line took on a bow echo appearance as bow beta elements began to push rapidly east.  A swath of 60 to 70 MPH winds took place from east of the Omaha-Council Bulffs area in southwest Iowa all the way east into central Iowa in the Marshalltown and Oskaloosa areas.  The high winds overturned semi-tractortrailer trucks in Guthrie and Greene Counties.  Shingles were also blown from a house in Guthrie Count west of Guthrie Center.  In Audubon County, high winds lifted two farm buildings off of their post foundations and carried them one quarter of a mile away.  A funnel cloud was observed west of Eldora in Hardin County.  Very heavy rainfall occurred over parts of northeast Iowa.  Franklin, Butler, and Grundy Counties were hard hit.  Numerous roads and highways were under water and closed as 4 to over 7 inches of rain fell in under six hours.  The heaviest rainfall total was in the Aplington Area in Butler County.  A total of 7.5 inches fell there.  Severe flooding took place in the New Hartford area.  Near record high river stages prompted the evacuation of the town.  In Parkersburg, 1500 to 2000 feet of railroad tracks were washed out.  There was some hail with the storms.  Most of them had small hail, though no significant hail was reported.

Flash Flood in BUTLER, IOWA
From 24-JUN-13 11:05:00 to 24-JUN-13 16:00:00 (CST-6)
Location: DUMONT
Flood cause: Heavy Rain
Property damage: 300.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Highway 3 covered by running water in various places between Hansell and Dumont in Butler County.  Streams out of their banks and fields full of water.

Thunderstorm Wind in STORY, IOWA
From 24-JUN-13 11:29:00 to 24-JUN-13 11:29:00 (CST-6)
Location: STORY CITY
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Damage to a house in Story City.  The sunroom blew off and over the house, then landed in a yard across the street.

Thunderstorm Wind in CLARKE, IOWA
From 24-JUN-13 11:30:00 to 24-JUN-13 11:30:00 (CST-6)
Location: LESLIE
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 1.00K
Reported by: Public

A machine shed was destroyed and debris strewn across the field to the northeast. A large tree was snapped toward the top.

Thunderstorm Wind in GREENE, IOWA
From 24-JUN-13 10:40:00 to 24-JUN-13 10:40:00 (CST-6)
Location: SCRANTON
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Semi truck overturned on Highway 30 north of
Scranton.  Numerous 2 inch diameter tree branches down.

Thunderstorm Wind in STORY, IOWA
From 24-JUN-13 11:20:00 to 24-JUN-13 11:20:00 (CST-6)
Location: GILBERT
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two foot diameter tree blown down across 180th St east of 550th Ave.

Thunderstorm Wind in CASS, IOWA
From 24-JUN-13 09:47:00 to 24-JUN-13 09:47:00 (CST-6)
Location: ATLANTIC
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Large tree limbs down.  Power was out for 1 to 2 hours in Atlantic.

Flash Flood in BUTLER, IOWA
From 24-JUN-13 10:42:00 to 24-JUN-13 16:00:00 (CST-6)
Location: ELEANOR
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms produced 3.5 to 4 inches of rain in a short time.  Roads covered in Aplington in the area of Highway 57 and 6th Ave.

Flash Flood in GRUNDY, IOWA
From 24-JUN-13 11:55:00 to 24-JUN-13 17:30:00 (CST-6)
Location: WELLSBURG
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous paved and gravel roads covered, including D17 and T19.  Barricades placed across roads.

Flash Flood in HARDIN, IOWA
From 24-JUN-13 14:24:00 to 24-JUN-13 17:30:00 (CST-6)
Location: ACKLEY
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Parts of S56 is flooded.  Several roads near Ackley were flooded.

Thunderstorm Wind in POLK, IOWA
From 24-JUN-13 11:05:00 to 24-JUN-13 11:05:00 (CST-6)
Location: POLK CITY
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Employee

Off duty NWS employee reports 4 inch tree limbs down in town.

Thunderstorm Wind in AUDUBON, IOWA
From 24-JUN-13 10:00:00 to 24-JUN-13 10:30:00 (CST-6)
Location: SHARON
Magnitude: 65.00 EG
Property damage: 250.00K
Crop damage: 50.00K
Reported by: Trained Spotter

Winds lasted 30 minutes in the Audubon area.  Tree limbs 4 to 5 inches in diameter were down, corn flattened, town totally without electricity.  A farmstead lost 2 buildings southwest of town.

Flash Flood in BUTLER, IOWA
From 24-JUN-13 12:25:00 to 24-JUN-13 16:30:00 (CST-6)
Location: AUSTINVILLE
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Highway 57 closed both east and west of Aplington due to water.  Numerous County roads including black topped roads are closed in the Aplington area and to the south and west of Aplington.

Thunderstorm Wind in GUTHRIE, IOWA
From 24-JUN-13 10:08:00 to 24-JUN-13 10:08:00 (CST-6)
Location: WICHITA
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Shingles blown off of a house.

Thunderstorm Wind in GUTHRIE, IOWA
From 24-JUN-13 10:23:00 to 24-JUN-13 10:23:00 (CST-6)
Location: HERNDON
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Semi truck on Highway 141 tipped over by very strong winds.

Thunderstorm Wind in WAYNE, IOWA
From 24-JUN-13 12:15:00 to 24-JUN-13 12:15:00 (CST-6)
Location: CORYDON
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees down, plate glass windows blown out and trees onto homes. Power lines also blown down.

Thunderstorm Wind in CARROLL, IOWA
From 24-JUN-13 10:30:00 to 24-JUN-13 10:30:00 (CST-6)
Location: CARROLL NEU ARPT
Magnitude: 55.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: AWOS

First measured gust of 60 mph at 1030 CST, second 63 mph at 1035 CST.

Thunderstorm Wind in GREENE, IOWA
From 24-JUN-13 10:33:00 to 24-JUN-13 10:33:00 (CST-6)
Location: SCRANTON
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur radio operator estimates 60 MPH wind.

Thunderstorm Wind in GUTHRIE, IOWA
From 24-JUN-13 10:30:00 to 24-JUN-13 10:30:00 (CST-6)
Location: BAYARD
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Power lines were blown down by thunderstorms winds.  Ten inch diameter tree limbs blown down to the ground onto power lines. Ten to Twelve inch diameter tree limbs blown down.

Thunderstorm Wind in GRUNDY, IOWA
From 24-JUN-13 10:14:00 to 24-JUN-13 10:14:00 (CST-6)
Location: FERN
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Three inch tree branches blown down and one of them impaled into the ground.

Thunderstorm Wind in GRUNDY, IOWA
From 24-JUN-13 10:05:00 to 24-JUN-13 10:05:00 (CST-6)
Location: WELLSBURG
Magnitude: 56.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Large tree branches from the top half of trees snapped off and a barn was destroyed.

Thunderstorm Wind in GRUNDY, IOWA
From 24-JUN-13 10:09:00 to 24-JUN-13 10:09:00 (CST-6)
Location: WELLSBURG
Magnitude: 61.00 EG
Property damage: 200.00K
Crop damage: 50.00K
Reported by: Emergency Manager

Multiple barns destroyed and some tree damage. Crops flattened as well.

Funnel Cloud in HARDIN, IOWA
From 24-JUN-13 10:42:00 to 24-JUN-13 10:42:00 (CST-6)
Location: ELDORA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in BOONE, IOWA
From 24-JUN-13 10:55:00 to 24-JUN-13 10:55:00 (CST-6)
Location: OGDEN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter estimated gust.

Thunderstorm Wind in MARSHALL, IOWA
From 24-JUN-13 12:11:00 to 24-JUN-13 12:11:00 (CST-6)
Location: MARSHALLTOWN ARPT
Magnitude: 55.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Rain in MAHASKA, IOWA
From 24-JUN-13 12:45:00 to 24-JUN-13 12:45:00 (CST-6)
Location: OSKALOOSA ROTH ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

One inch of rainfall.

Thunderstorm Wind in GREENE, IOWA
From 24-JUN-13 10:35:00 to 24-JUN-13 10:35:00 (CST-6)
Location: SCRANTON
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Estimated by spotter.

Heavy Rain in BUTLER, IOWA
From 24-JUN-13 13:30:00 to 24-JUN-13 13:30:00 (CST-6)
Location: APLINGTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Total rainfall since early this morning was 7.2 inches.

Heavy Rain in BUTLER, IOWA
From 24-JUN-13 09:00:00 to 24-JUN-13 16:00:00 (CST-6)
Location: PARKERSBURG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall of 4.64 inches of rain since 0900 CST.

Thunderstorm Wind in CASS, IOWA
From 24-JUN-13 09:44:00 to 24-JUN-13 09:44:00 (CST-6)
Location: ATLANTIC
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in AUDUBON, IOWA
From 24-JUN-13 10:04:00 to 24-JUN-13 10:04:00 (CST-6)
Location: AUDUBON
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds estimated up to 70 MPH causing the building to shake.  Spotter unable to open doors to outside due to wind.

Thunderstorm Wind in DALLAS, IOWA
From 24-JUN-13 10:40:00 to 24-JUN-13 10:40:00 (CST-6)
Location: PERRY MUNI ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CASS, IOWA
From 24-JUN-13 09:45:00 to 24-JUN-13 09:45:00 (CST-6)
Location: ATLANTIC
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Five inch diameter branches down in the street.

Thunderstorm Wind in GREENE, IOWA
From 24-JUN-13 10:40:00 to 24-JUN-13 10:40:00 (CST-6)
Location: SCRANTON
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A trailer advertisement in a field was blown over hear Highway 25 and Highway 30 north of Scranton.

Thunderstorm Wind in GREENE, IOWA
From 24-JUN-13 10:40:00 to 24-JUN-13 10:40:00 (CST-6)
Location: CHURDAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter estimated gust.

Thunderstorm Wind in MAHASKA, IOWA
From 24-JUN-13 12:55:00 to 24-JUN-13 12:55:00 (CST-6)
Location: OSKALOOSA MUNI ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heavy Rain in BUTLER, IOWA
From 25-JUN-13 08:00:00 to 25-JUN-13 08:00:00 (CST-6)
Location: PARKERSBURG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall total for the 24 hours ending at 0800 CST was 5.34 inches.

Thunderstorm Wind in BOONE, IOWA
From 24-JUN-13 10:56:00 to 24-JUN-13 10:56:00 (CST-6)
Location: OGDEN
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The roof was blown off of a pole barn.

Heavy Rain in TAMA, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: CLUTIER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall total for the past 24 hours was 2.39 inches.

Heavy Rain in HAMILTON, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: WEBSTER CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall 24 hour total as of 0600 CST was 2.37 inches.

Heavy Rain in TAMA, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: TRAER MUNI ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall total for the past 24 hours was 2.42 inches.

Heavy Rain in HARDIN, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: IOWA FALLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall 24 hour total as of 0600 CST was 2.49 inches.

Thunderstorm Wind in CASS, IOWA
From 24-JUN-13 09:41:00 to 24-JUN-13 09:41:00 (CST-6)
Location: MARNE
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

A camper was blown on its side and large tree limbs ten to twelve inches in diameter were snapped from trees.

Heavy Rain in MARSHALL, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: GILMAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall 24 hour total as of 0600 CST was 1.85 inches.

Heavy Rain in MARSHALL, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: MARSHALLTOWN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall 24 hour total as of 0600 CST was 1.80 inches.

Heavy Rain in CALHOUN, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: ROCKWELL CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall 24 hour total as of 0600 CST was 1.78 inches.

Heavy Rain in HAMILTON, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: WEBSTER CITY ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Rainfall 24 hour total as of 0600 CST was 2.57 inches.

Heavy Rain in MARION, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: KNOXVILLE ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Rainfall 24 hour total as of 0600 CST was 2.24 inches.

Heavy Rain in MARION, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: KNOXVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall 24 hour total as of 0600 CST was 2.38 inches.

Heavy Rain in MARSHALL, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: MARSHALLTOWN ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Rainfall 24 hour total as of 0600 CST was 2.29 inches.

Heavy Rain in MARION, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: HARVEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall 24 hour total as of 0600 CST was 1.98 inches.

Heavy Rain in WEBSTER, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: (FOD)FT DODGE MUNI A
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall total for the previous 24 hours ending 0600 CST was 1.80 inches.

Heavy Rain in BUTLER, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: APLINGTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall total for the previous 24 hours ending 0600 CST was 7.50 inches.

Heavy Rain in TAMA, IOWA
From 25-JUN-13 06:00:00 to 25-JUN-13 06:00:00 (CST-6)
Location: TOLEDO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall total for the previous 24 hours ending 0600 CST was 1.89 inches.

Thunderstorm Wind in BOONE, IOWA
From 24-JUN-13 10:55:00 to 24-JUN-13 10:55:00 (CST-6)
Location: BOXHOLM
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Four inch tree limbs were blown down in town.

Flood in BUTLER, IOWA
From 25-JUN-13 01:00:00 to 25-JUN-13 08:30:00 (CST-6)
Location: PARKERSBURG
Flood cause: Heavy Rain
Property damage: 1.00M
Crop damage: 250.00K
Reported by: COOP Observer

About 1500 to 2000 feet of railroad tracks were washed out near Parkersburg.  Several houses on the west side of town have at least a foot of water in them.

Thunderstorm Wind in BOONE, IOWA
From 24-JUN-13 10:55:00 to 24-JUN-13 10:55:00 (CST-6)
Location: OGDEN
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Three inch diameter tree limbs down.