A warm front extended from a surface low pressure in northwest Kansas to just north of Omaha and then into central Illinois on May 29, 2013. Plentiful moisture was noted south of this front with dewpoints in the 60s.  A strengthening low level jet to 50 knots impinging on the front developed numerous thunderstorms across the area. These storms produced damaging wind, large hail and flash flooding.  The emergency manager in Linn county reported the town of Walker sustained major damage from severe flash flooding, mostly due to Blue Creek in town. Between 50 and 100 homes were damaged, a couple of businesses were destroyed and bridges were under water. About 5 inches of rain fell in about 2 hours.

Hail in BENTON, IOWA
From 29-MAY-13 16:36:00 to 29-MAY-13 16:36:00 (CST-6)
Location: SHELLSBURG
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DELAWARE, IOWA
From 29-MAY-13 16:56:00 to 29-MAY-13 16:56:00 (CST-6)
Location: COLESBURG
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in DELAWARE, IOWA
From 29-MAY-13 16:57:00 to 29-MAY-13 16:57:00 (CST-6)
Location: COLESBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in IOWA, IOWA
From 29-MAY-13 16:10:00 to 29-MAY-13 16:10:00 (CST-6)
Location: WEST AMANA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DELAWARE, IOWA
From 29-MAY-13 19:29:00 to 29-MAY-13 19:29:00 (CST-6)
Location: COLESBURG
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash Flood in BENTON, IOWA
From 29-MAY-13 17:09:00 to 29-MAY-13 17:09:00 (CST-6)
Location: VINTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager reported street flooding in low lying locations in town.  Creeks were filling up and going out of their banks.

Flash Flood in DELAWARE, IOWA
From 29-MAY-13 18:24:00 to 29-MAY-13 18:24:00 (CST-6)
Location: COFFINS GROVE PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager reported several roads closed with running water between Edgewood and Greeley to Manchester.  Also street flooding and water in low lying areas was reported.

Flash Flood in BUCHANAN, IOWA
From 29-MAY-13 18:49:00 to 29-MAY-13 18:49:00 (CST-6)
Location: WINTHROP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported streets flooded and water onto lawns, along with creeks out of their banks.  There was also considerable flooding of fields.

Flash Flood in BUCHANAN, IOWA
From 29-MAY-13 19:05:00 to 29-MAY-13 19:05:00 (CST-6)
Location: MONTI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager reported water was over the 4 lane U.S. Highway 20 at the Delaware/Buchanan county line.  The highway was closed due to the high water.

Flash Flood in LINN, IOWA
From 29-MAY-13 20:00:00 to 29-MAY-13 20:00:00 (CST-6)
Location: WALKER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager reported the town of Walker sustained major damage from severe flash flooding, mostly due to Blue Creek in town. Between 50 and 100 homes were damaged, a couple of businesses were destroyed and bridges were under water. About 5 inches of rain fell in about 2 hours.

Flash Flood in DELAWARE, IOWA
From 29-MAY-13 20:06:00 to 29-MAY-13 20:06:00 (CST-6)
Location: EDGEWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported widespread moderate to severe flooding with many roads closed.

Flash Flood in BUCHANAN, IOWA
From 29-MAY-13 20:35:00 to 29-MAY-13 20:35:00 (CST-6)
Location: QUASQUETON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Water was reported over River Drive in town, along with fields and ditches flooded between Independence and Quasqueton.

Flash Flood in BUCHANAN, IOWA
From 29-MAY-13 21:24:00 to 29-MAY-13 21:24:00 (CST-6)
Location: INDEPENDENCE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported several streets in downtown Independence flooded and closed.

Thunderstorm Wind in BUCHANAN, IOWA
From 29-MAY-13 16:00:00 to 29-MAY-13 16:00:00 (CST-6)
Location: HAZLETON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A COOP observer reported 60 mph winds near Hazelton.

Thunderstorm Wind in BUCHANAN, IOWA
From 29-MAY-13 16:00:00 to 29-MAY-13 16:00:00 (CST-6)
Location: HAZLETON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured 2 six inch diameter limbs down.

Thunderstorm Wind in DELAWARE, IOWA
From 29-MAY-13 16:40:00 to 29-MAY-13 16:40:00 (CST-6)
Location: EDGEWOOD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager reported 10 inch tree limbs down in Edgewood along with power out in town.

Thunderstorm Wind in BUCHANAN, IOWA
From 29-MAY-13 16:00:00 to 29-MAY-13 16:00:00 (CST-6)
Location: STANLEY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a 30 foot tall cedar tree about 3-4 feet in diameter snapped off 5 feet above the ground. The tree was blocking county road W33.

Thunderstorm Wind in BUCHANAN, IOWA
From 29-MAY-13 16:12:00 to 29-MAY-13 16:12:00 (CST-6)
Location: HAZLETON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a metal barn door severely damaged and torn off 2 miles northeast of Hazelton.

Thunderstorm Wind in BUCHANAN, IOWA
From 29-MAY-13 16:12:00 to 29-MAY-13 16:12:00 (CST-6)
Location: AURORA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a machine shed roof and door damaged near Aurora.

Thunderstorm Wind in BENTON, IOWA
From 29-MAY-13 18:15:00 to 29-MAY-13 18:15:00 (CST-6)
Location: URBANA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager reported 2 trees down in Benton City Park in Urbana.

Hail in BENTON, IOWA
From 29-MAY-13 16:07:00 to 29-MAY-13 16:07:00 (CST-6)
Location: NORWAY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BENTON, IOWA
From 29-MAY-13 16:34:00 to 29-MAY-13 16:34:00 (CST-6)
Location: SHELLSBURG
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter