Thunderstorms produced Damaging winds, flash flooding, marginally large hail, and two reported tornadoes in various parts of northwest Iowa from the evening of June 26th to a few hours after midnight on June 27th.

Flash Flood in IDA, IOWA
From 27-JUN-10 01:24:00 to 27-JUN-10 05:00:00 (CST-6)
Location: IDA GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rainfall of 5 to 7 inches caused flash flooding of numerous streets and several basements.

Flash Flood in CLAY, IOWA
From 26-JUN-10 23:55:00 to 27-JUN-10 01:00:00 (CST-6)
Location: (3SE)SPENCER MUNI AR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain caused flash flooding on a few roads and a small stream.

Tornado in OSCEOLA, IOWA
From 26-JUN-10 19:12:00 to 26-JUN-10 19:13:00 (CST-6)
Location: OCHEYEDAN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A brief tornado caused no reported damage.

Tornado in OSCEOLA, IOWA
From 26-JUN-10 19:15:00 to 26-JUN-10 19:16:00 (CST-6)
Location: ASHTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A brief tornado caused no reported damage.

Hail in SIOUX, IOWA
From 26-JUN-10 20:21:00 to 26-JUN-10 20:28:00 (CST-6)
Location: ORANGE CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large hail was accompanied by extimated 50 mph wind gusts.

Flash Flood in SIOUX, IOWA
From 26-JUN-10 21:20:00 to 26-JUN-10 23:30:00 (CST-6)
Location: ORANGE CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain caused flash flooding of roads, as well as some yards and basements.

Flash Flood in CHEROKEE, IOWA
From 26-JUN-10 22:56:00 to 27-JUN-10 00:30:00 (CST-6)
Location: MERIDEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain caused flooding of most streets in the town of Cherokee. Some basements and yards were also flooded.

Thunderstorm Wind in CHEROKEE, IOWA
From 26-JUN-10 21:40:00 to 26-JUN-10 21:40:00 (CST-6)
Location: MERIDEN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

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

Thunderstorm Wind in WOODBURY, IOWA
From 26-JUN-10 23:00:00 to 26-JUN-10 23:00:00 (CST-6)
Location: SLOAN
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds caused tree damage, including a large tree blown down. The winds also blew down power lines, some of which fell onto a house.

Thunderstorm Wind in SIOUX, IOWA
From 26-JUN-10 18:55:00 to 26-JUN-10 18:55:00 (CST-6)
Location: ROCK VLY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage, including large limbs blown down onto a house.

Funnel Cloud in OSCEOLA, IOWA
From 26-JUN-10 19:05:00 to 26-JUN-10 19:05:00 (CST-6)
Location: ASHTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in OSCEOLA, IOWA
From 26-JUN-10 19:38:00 to 26-JUN-10 19:38:00 (CST-6)
Location: MELVIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage, including branches blown down.