Thunderstorms produced flash flooding and damaging winds at several locations in northwest Iowa on the evening of June 20th. There was also one tornado reported.

Thunderstorm Wind in WOODBURY, IOWA
From 20-JUN-11 20:04:00 to 20-JUN-11 20:04:00 (CST-6)
Location: SALIX
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds blew down several large branches.

Thunderstorm Wind in IDA, IOWA
From 20-JUN-11 20:30:00 to 20-JUN-11 20:30:00 (CST-6)
Location: HOLSTEIN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm winds caused tree damage, including up to 12 inch diameter branches blown down. Some roads were closed by tree debris.

Tornado in PLYMOUTH, IOWA
From 20-JUN-11 20:40:00 to 20-JUN-11 20:42:00 (CST-6)
Location: O LEARY
Tornado F-scale: EF0
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tornado damaged several farm buildings and grain bins.

Thunderstorm Wind in PLYMOUTH, IOWA
From 20-JUN-11 21:00:00 to 20-JUN-11 21:00:00 (CST-6)
Location: CRAIG
Magnitude: 61.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm winds caused tree damage, including up to 3 foot diameter trees blown down. Some vehicles were damaged by falling trees.

Thunderstorm Wind in O'BRIEN, IOWA
From 20-JUN-11 21:10:00 to 20-JUN-11 21:10:00 (CST-6)
Location: SUTHERLAND
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds caused tree damage, including large trees blown down.

Thunderstorm Wind in O'BRIEN, IOWA
From 20-JUN-11 21:15:00 to 20-JUN-11 21:15:00 (CST-6)
Location: PRIMGHAR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds caused tree damage, including several trees blown down.

Flash Flood in PLYMOUTH, IOWA
From 20-JUN-11 21:21:00 to 20-JUN-11 22:30:00 (CST-6)
Location: MERRILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Heavy rain from thunderstorms caused flash flooding of Perry Creek.

Thunderstorm Wind in O'BRIEN, IOWA
From 20-JUN-11 21:25:00 to 20-JUN-11 21:25:00 (CST-6)
Location: HARTLEY MUNI ARPT
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds damaged the roofs of two hog confinement structures.

Thunderstorm Wind in O'BRIEN, IOWA
From 20-JUN-11 21:30:00 to 20-JUN-11 21:30:00 (CST-6)
Location: HARTLEY
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew off part of the roof of a machine shed.

Thunderstorm Wind in CLAY, IOWA
From 20-JUN-11 21:42:00 to 20-JUN-11 21:42:00 (CST-6)
Location: SPENCER
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds caused tree damage, including large branches and a few trees blown down.

Thunderstorm Wind in OSCEOLA, IOWA
From 20-JUN-11 21:45:00 to 20-JUN-11 21:45:00 (CST-6)
Location: MAY CITY
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm winds damaged the roof of a machine shed and caused tree damage. Some trees were blown down on houses and across roads.

Thunderstorm Wind in WOODBURY, IOWA
From 20-JUN-11 20:12:00 to 20-JUN-11 20:12:00 (CST-6)
Location: OTO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm winds caused tree damage, including several branches blown down.

Thunderstorm Wind in WOODBURY, IOWA
From 20-JUN-11 20:20:00 to 20-JUN-11 20:20:00 (CST-6)
Location: MOVILLE
Magnitude: 70.00 EG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds tore roofs off 3 homes and damaged the roofs of at least 40 other homes. The winds also caused widespread tree damage and overturned four campers. There were 2 people injured in the overturned campers.

Thunderstorm Wind in IDA, IOWA
From 20-JUN-11 20:30:00 to 20-JUN-11 20:30:00 (CST-6)
Location: BATTLE CREEK
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down large branches and power lines, with a resulting power outage.

Thunderstorm Wind in OSCEOLA, IOWA
From 20-JUN-11 21:50:00 to 20-JUN-11 21:50:00 (CST-6)
Location: HARRIS
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew a 3 stall garage off its foundation.