Mostly cloudy skies and above normal temperatures were seen across eastern Iowa, northwest Illinois, and northeast Missouri during the early morning hours on July 11. Showers and thunderstorms moved across east central Iowa into northern Illinois between 4 am CDT and 7 am CDT, with many areas seeing damaging winds in excess of 70 mph. Widespread damage was seen from Vinton, IA to Dubuque, IA, with numerous downed power lines and large trees blown down.  Morning low temperatures ranged from 68 degrees in Cedar Rapids, IA to 81 degrees in Macomb, IL.

Thunderstorm Wind in WHITESIDE, ILLINOIS
From 11-JUL-11 05:50:00 to 11-JUL-11 05:50:00 (CST-6)
Location: COMO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 60 mph were observed 3 miles west of Rock Falls, IL around 650 am CDT July 11.

Thunderstorm Wind in WHITESIDE, ILLINOIS
From 11-JUL-11 05:53:00 to 11-JUL-11 05:53:00 (CST-6)
Location: ROCK FALLS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 50 to 60 mph were observed in Rock Falls, IL at 653 am CDT July 11.  This report was relayed by the Rock Falls ESDA.

Thunderstorm Wind in CARROLL, ILLINOIS
From 11-JUL-11 05:25:00 to 11-JUL-11 05:25:00 (CST-6)
Location: MARCUS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 65 mph were observed 7 miles northwest of Mount Carroll, IL at 625 am CDT July 11.

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 11-JUL-11 05:27:00 to 11-JUL-11 05:27:00 (CST-6)
Location: ELMOVILLE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 65 mph were observed 4 miles west southwest of Loran, IL at 627 am CDT July 11.

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 11-JUL-11 05:27:00 to 11-JUL-11 05:27:00 (CST-6)
Location: STOCKTON
Magnitude: 56.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts estimated to be 65 mph blew some storm windows into a home in Stockton, IL at 627 am CDT July 11.  Some metal yard furniture was also blown around the yard.  This report was relayed by WREX.

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 11-JUL-11 05:35:00 to 11-JUL-11 05:35:00 (CST-6)
Location: NORA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph blew down a large tree 1 miles east southeast of Nora, IL at 635 am CDT July 11.

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 11-JUL-11 05:35:00 to 11-JUL-11 05:35:00 (CST-6)
Location: NORA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph were observed 1 mile east southeast of Nora, IL at 635 am CDT July 11. Electric poles reported knocked over along the Stagecoach Trail east and southeast of Nora.

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 11-JUL-11 05:20:00 to 11-JUL-11 05:20:00 (CST-6)
Location: APPLE RIVER
Magnitude: 61.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph blew down several large trees and a metal flag pole in Apple River, IL at 620 am CDT July 11.  Almost every property in the 400 person town suffered some damage.  Information from this report was also attained from a news paper article.

Thunderstorm Wind in WHITESIDE, ILLINOIS
From 11-JUL-11 05:53:00 to 11-JUL-11 05:53:00 (CST-6)
Location: STERLING
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph were observed in Sterling, IL at 653 am CDT July 11.  Reports of trees and large limbs down on power lines in Sterling near the Sinnissippi Park. A number of residents in Whiteside County were left without power in the wake of the storm.

Thunderstorm Wind in STEPHENSON, ILLINOIS
From 11-JUL-11 08:00:00 to 11-JUL-11 08:00:00 (CST-6)
Location: FREEPORT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Numerous reports of trees and power lines down across the county. The Stephenson County Highway Department salt storage bin was destroyed during the storm.