A large convective complex developed to the northwest of Iowa during the night of the 12th into the morning of the 13th.  Precipitable water values were very high, in excess of 2.1 inches over Minnesota.  Thunderstorms began to turn south into Iowa in the morning and continue to feed into the inflow of moisture.  In spite of the precipitable water values being much lower over Iowa, moisture convergence was strong making the storms very efficient rain producers.  Three to six inches of rain fall over parts of north central IA.  Some of the heavier rainfall, 4.75 to 5.5 inches, fell in the Lake Mills area of Winnebago County.  The heavy rain caused flash flooding in Worth County with several streets flooded.  Basement flooding was extensive in the town of Fertile.  Flash flooding was also reported in parts of Winnebago County.  Due to the relatively dry soil condition at the beginning of the rainfall, flooding was not as serious as would normally be expected.  General flooding continued into the night in Winnebago County.

Heavy Rain in WORTH, IOWA
From 13-JUL-13 08:00:00 to 13-JUL-13 11:55:00 (CST-6)
Location: MANLY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The rainfall since 0800 was 4.3 inches.

Flash Flood in WORTH, IOWA
From 13-JUL-13 10:30:00 to 13-JUL-13 17:00:00 (CST-6)
Location: JOICE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Water was about 6 inches deep and flowing over the main street near Lindon Street in Joice.  Total rainfall from 0845 through 1100 was 4.75 inches.

Heavy Rain in WINNEBAGO, IOWA
From 13-JUL-13 08:30:00 to 13-JUL-13 11:05:00 (CST-6)
Location: LAKE MILLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rain started around 0830 with an estimated 5.5 to 6 inches of rainfall.

Heavy Rain in WORTH, IOWA
From 13-JUL-13 07:00:00 to 13-JUL-13 11:00:00 (CST-6)
Location: FERTILE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter measured 3.25 inches of rain from 0700 to 1100.

Flash Flood in WORTH, IOWA
From 13-JUL-13 11:28:00 to 13-JUL-13 17:00:00 (CST-6)
Location: MANLY
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water was over Mallard Avenue near 350th St.

Flash Flood in WORTH, IOWA
From 13-JUL-13 12:35:00 to 13-JUL-13 17:00:00 (CST-6)
Location: FERTILE
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water over 375th St. near Apricot Avenue.

Flash Flood in WINNEBAGO, IOWA
From 13-JUL-13 14:55:00 to 13-JUL-13 17:00:00 (CST-6)
Location: SCARVILLE
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A sink hole developed near the intersection of 480th and 160th due to heavy rain.

Heavy Rain in WORTH, IOWA
From 13-JUL-13 09:00:00 to 13-JUL-13 12:00:00 (CST-6)
Location: JOICE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall of 4.7 inches through the morning hours.

Heavy Rain in WINNEBAGO, IOWA
From 13-JUL-13 06:00:00 to 13-JUL-13 12:45:00 (CST-6)
Location: LAKE MILLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall estimate since 0600 was 4.75 inches.

Flash Flood in WORTH, IOWA
From 13-JUL-13 11:27:00 to 13-JUL-13 17:00:00 (CST-6)
Location: MANLY
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water was over 350th near Lark Avenue.

Flash Flood in WORTH, IOWA
From 13-JUL-13 12:35:00 to 13-JUL-13 17:00:00 (CST-6)
Location: FERTILE
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Parks Street and West Main Street were extremely flooded.  Three to four houses were inundated by water along West Washington St. in Fertile.

Flash Flood in WORTH, IOWA
From 13-JUL-13 14:30:00 to 13-JUL-13 17:00:00 (CST-6)
Location: HANLONTOWN
Flood cause: Heavy Rain
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Grouse Ave was closed between 380th and 390th due to water damage from flooding.

Flood in WINNEBAGO, IOWA
From 13-JUL-13 19:19:00 to 14-JUL-13 08:00:00 (CST-6)
Location: LELAND
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A sink hole developed near 190th and 420th due to heavy rain.