Severe thunderstorms produced damaging winds during the morning hours of September 2nd across portions of northeast Iowa. Winds up to 70 mph occurred across much of Mitchell and Howard Counties into the northwest corner of Winneshiek County. In this damage area, widespread crop damage occurred as both corn and bean fields were flattened by the wind. The U.S. Department of Agriculture issued a natural disaster designation for this damage for Mitchell, Howard and Floyd Counties. In addition, widespread tree damage occurred, two sheds and several grain bins were either destroyed or damaged, two light poles were blown over at a high school football field in Riceville (Howard County) and over 70 power poles were downed across Mitchell and Howard Counties. Total damages are estimated to be near 50 million dollars.

Thunderstorm Wind in HOWARD, IOWA
From 02-SEP-11 05:10:00 to 02-SEP-11 05:40:00 (CST-6)
Location: RICEVILLE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 7.50M
Reported by: Other Federal Agency

Numerous corn fields were flattened across Howard County. The USDA estimated that almost 3200 acres of corn were destroyed while 16,000 acres suffered a 25 bushel per acre yield loss. Total crop losses were estimated to be around $7.5 million. The U.S. Department of Agriculture issued a natural disaster designation for this damage.

Thunderstorm Wind in WINNESHIEK, IOWA
From 02-SEP-11 05:39:00 to 02-SEP-11 05:39:00 (CST-6)
Location: KENDALLVILLE
Magnitude: 61.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several large trees were blown down across State Highway 139 near Kendallville. In addition, a tree went down on a house northwest of Kendallville on County Road A14.

Thunderstorm Wind in HOWARD, IOWA
From 02-SEP-11 05:09:00 to 02-SEP-11 05:09:00 (CST-6)
Location: RICEVILLE
Magnitude: 61.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: Newspaper

Widespread tree damage and power outages occurred in Riceville. Also, two light poles were blown down at the Rasmussen High School football field. One of the poles fell on a set of portable bleachers.

Thunderstorm Wind in HOWARD, IOWA
From 02-SEP-11 05:25:00 to 02-SEP-11 05:25:00 (CST-6)
Location: SARATOGA
Magnitude: 61.00 EG
Property damage: 740.00K
Crop damage: 0.00K
Reported by: Newspaper

A building roof and several grain bins were damaged, a shed destroyed and 70 power poles blown down along Jade Avenue five miles west of Lime Springs.

Thunderstorm Wind in HOWARD, IOWA
From 02-SEP-11 05:35:00 to 02-SEP-11 05:35:00 (CST-6)
Location: CRESCO MUNI ARPT
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A semi truck was blown over on State Highway 9 near Cresco.

Thunderstorm Wind in MITCHELL, IOWA
From 02-SEP-11 04:59:00 to 02-SEP-11 04:59:00 (CST-6)
Location: STACYVILLE
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

Numerous trees were blown over, a shed was destroyed, a barn roof damaged and wind turbine blades bent in or near Stacyville.

Thunderstorm Wind in MITCHELL, IOWA
From 02-SEP-11 04:52:00 to 02-SEP-11 04:52:00 (CST-6)
Location: ST ANSGAR
Magnitude: 57.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An above ground pool was flipped over and several tree branches were blown down.

Thunderstorm Wind in HOWARD, IOWA
From 02-SEP-11 05:26:00 to 02-SEP-11 05:26:00 (CST-6)
Location: DAVIS CORNERS
Magnitude: 61.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: Newspaper

A semi truck was blown over on U.S. Highway 63 north of Davis Corners and sustained  minor damage.

Thunderstorm Wind in HOWARD, IOWA
From 02-SEP-11 05:25:00 to 02-SEP-11 05:25:00 (CST-6)
Location: CHESTER
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

An estimated wind gust of 70 miles per hour occurred in Chester blowing down several power lines.

Thunderstorm Wind in MITCHELL, IOWA
From 02-SEP-11 04:58:00 to 02-SEP-11 04:58:00 (CST-6)
Location: OSAGE
Magnitude: 61.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down on a house and several other trees and light poles were damaged in Osage.

Thunderstorm Wind in WINNESHIEK, IOWA
From 02-SEP-11 05:45:00 to 02-SEP-11 05:45:00 (CST-6)
Location: DECORAH
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous branches and small trees were blown down in and near Decorah.

Thunderstorm Wind in HOWARD, IOWA
From 02-SEP-11 05:16:00 to 02-SEP-11 05:16:00 (CST-6)
Location: SARATOGA
Magnitude: 61.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Newspaper

Several large grain bins were buckled by the high winds.

Thunderstorm Wind in HOWARD, IOWA
From 02-SEP-11 05:27:00 to 02-SEP-11 05:27:00 (CST-6)
Location: LIME SPGS
Magnitude: 61.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Newspaper

Numerous trees were blown over in Lime Springs.

Thunderstorm Wind in MITCHELL, IOWA
From 02-SEP-11 04:50:00 to 02-SEP-11 05:10:00 (CST-6)
Location: CARPENTER
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 41.40M
Reported by: Other Federal Agency

Widespread corn and bean fields were flattened across Mitchell County. The USDA estimated that 500 acres of corn were destroyed while 81,000 acres suffered a 60% yield loss. Almost 8,600 acres of beans suffered a 10% yield loss. Total crop losses were estimated to be in excess of $41 million. The U.S. Department of Agriculture issued a natural disaster designation for this damage.