An upper level disturbance tracked over Iowa and northern Missouri April 17th and 18th, bringing several rounds of showers and thunderstorms to the region.  Heavy rains of 3 to 7 inches were recorded over the 48 hour period.  This resulted in widespread flash flooding.  Some of the stronger storms also produced large hail and wind gusts over 60 mph.

Hail in WASHINGTON, IOWA
From 17-APR-13 09:30:00 to 17-APR-13 09:30:00 (CST-6)
Location: WASHINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Quarter sized hail fell in Washington, IA around 1030 am CDT April 17.

Hail in JEFFERSON, IOWA
From 17-APR-13 10:41:00 to 17-APR-13 10:41:00 (CST-6)
Location: FAIRFIELD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CEDAR, IOWA
From 17-APR-13 10:05:00 to 17-APR-13 10:05:00 (CST-6)
Location: LOWDEN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in WASHINGTON, IOWA
From 17-APR-13 09:48:00 to 17-APR-13 09:48:00 (CST-6)
Location: NOBLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell 6 miles south of Washington, IA around 1048 am CDT April 17.

Hail in WASHINGTON, IOWA
From 17-APR-13 09:51:00 to 17-APR-13 09:51:00 (CST-6)
Location: WEST CHESTER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JOHNSON, IOWA
From 17-APR-13 09:31:00 to 17-APR-13 09:31:00 (CST-6)
Location: TIFFIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in JOHNSON, IOWA
From 17-APR-13 09:22:00 to 17-APR-13 09:22:00 (CST-6)
Location: NORTH LIBERTY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell 1 mile south southwest of North Liberty, IA at 1022 am CDT April 17.

Hail in JOHNSON, IOWA
From 17-APR-13 09:02:00 to 17-APR-13 09:02:00 (CST-6)
Location: IOWA CITY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MUSCATINE, IOWA
From 17-APR-13 05:45:00 to 17-APR-13 05:45:00 (CST-6)
Location: CONESVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in JEFFERSON, IOWA
From 17-APR-13 04:04:00 to 17-APR-13 04:04:00 (CST-6)
Location: FAIRFIELD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Thunderstorm Wind in KEOKUK, IOWA
From 17-APR-13 20:10:00 to 17-APR-13 20:10:00 (CST-6)
Location: RICHLAND
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement estimated a wind speed of 70 mph or 61 knots in Richland.

Flash Flood in JOHNSON, IOWA
From 17-APR-13 09:30:00 to 18-APR-13 03:00:00 (CST-6)
Location: SWISHER
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several rounds of heavy rain fell across Johnson County resulting in flash flooding of much of the county from the mid morning of April 17 through the early morning of April 18.

Flash Flood in WASHINGTON, IOWA
From 17-APR-13 09:30:00 to 18-APR-13 03:00:00 (CST-6)
Location: WELLMAN
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several rounds of heavy rain resulted in flash flooding across much of Washington County from the mid morning of April 17 through the early morning of April 18.

Flash Flood in CEDAR, IOWA
From 17-APR-13 10:30:00 to 18-APR-13 03:00:00 (CST-6)
Location: MECHANICSVILLE
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of heavy rains resulted in flash flooding across much of Cedar County from mid morning April 17 through the early morning April 18.

Flash Flood in JONES, IOWA
From 17-APR-13 19:00:00 to 18-APR-13 02:50:00 (CST-6)
Location: MONTICELLO
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several rounds of heavy rains resulted in flash flooding across much of Jones County from the evening of April 17 through the early morning of April 18.

Flash Flood in VAN BUREN, IOWA
From 17-APR-13 12:15:00 to 17-APR-13 17:45:00 (CST-6)
Location: SELMA
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several rounds of heavy rains resulted in flash flooding across much of Van Buren County during the afternoon of April 17.

Flash Flood in LINN, IOWA
From 17-APR-13 19:00:00 to 18-APR-13 02:30:00 (CST-6)
Location: WALKER
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several rounds of heavy rain resulted in flash flooding across much of Linn County from the mid evening of April 17 through the early morning of April 18.

Hail in JEFFERSON, IOWA
From 17-APR-13 09:44:00 to 17-APR-13 09:44:00 (CST-6)
Location: PLEASANT PLAIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell in Pleasant Plain, IA at 1044 am CDT April 17.