A strong cold front plowed eastward through eastern Iowa and northern Illinois during the late afternoon and evening hours of June 27 triggering a line of severe thunderstorms. Several areas not only received torrential downpours of rain...but also saw wind gusts in excess of 60 mph which caused numerous reports of tree damage and downed some utility poles and power lines. One of the stronger storms hit just southeast of Walnut Grove, IL destroying a barn and a grain bin. In addition, hail 1.25 inches in diameter fell just north of Burlington, IA.  Prior to all the wild  weather, hazy, hot, and humid conditions prevailed across the region, with high temperatures ranging from the upper 80s north to upper 90s south.

Thunderstorm Wind in MCDONOUGH, ILLINOIS
From 27-JUN-09 18:31:00 to 27-JUN-09 18:31:00 (CST-6)
Location: GOOD HOPE
Magnitude: 56.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 65 mph snapped a 15 inch diameter tree onto a residence on Highway 67 near the Warren-Mc Donough county line or about 3 miles south southwest of Swan Creek, IL around 731 pm June 27.

Thunderstorm Wind in MCDONOUGH, ILLINOIS
From 27-JUN-09 18:53:00 to 27-JUN-09 18:53:00 (CST-6)
Location: WALNUT GROVE
Magnitude: 61.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph tossed a grain bin onto the highway and power lines about 1.5 miles southeast of Walnut Grove, IL around 753 pm June 27.  A barn in the area was also destroyed with debris tossed about a half mile into the field.

Thunderstorm Wind in MCDONOUGH, ILLINOIS
From 27-JUN-09 18:55:00 to 27-JUN-09 18:55:00 (CST-6)
Location: BUSHNELL
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wind gusts estimated to be 70 mph blew down some trees and power lines between Bushnell, IL and Prairie City, IL around 755 pm June 27.

Thunderstorm Wind in WHITESIDE, ILLINOIS
From 27-JUN-09 16:35:00 to 27-JUN-09 16:35:00 (CST-6)
Location: FULTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 60 mph blew down some tree limbs 6 to 7 inches in diameter about 2 miles northeast of Fulton, IL around 535 pm June 27.

Thunderstorm Wind in CARROLL, ILLINOIS
From 27-JUN-09 16:37:00 to 27-JUN-09 16:37:00 (CST-6)
Location: LANARK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to be 60 mph about 3 miles north of Lanark, IL around 537 pm June 27.

Thunderstorm Wind in HENDERSON, ILLINOIS
From 27-JUN-09 17:20:00 to 27-JUN-09 17:20:00 (CST-6)
Location: OQUAWKA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to be 55 to 60 mph in Oquawka, IL around 620 pm June 27.

Thunderstorm Wind in WARREN, ILLINOIS
From 27-JUN-09 17:35:00 to 27-JUN-09 17:35:00 (CST-6)
Location: WOODVALE
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BUREAU, ILLINOIS
From 27-JUN-09 17:37:00 to 27-JUN-09 17:37:00 (CST-6)
Location: WALNUT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 65 mph blew a 12 inch diameter tree limb down in Walnut, IL around 637 pm June 27.

Thunderstorm Wind in WARREN, ILLINOIS
From 27-JUN-09 18:05:00 to 27-JUN-09 18:05:00 (CST-6)
Location: ROSEVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 60 mph blew down some large tree limbs about 1 mile west of Roseville, IL around 705 pm June 27.

Thunderstorm Wind in MCDONOUGH, ILLINOIS
From 27-JUN-09 18:40:00 to 27-JUN-09 18:40:00 (CST-6)
Location: GOOD HOPE
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CARROLL, ILLINOIS
From 27-JUN-09 16:48:00 to 27-JUN-09 16:48:00 (CST-6)
Location: IDEAL
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 50.00K
Reported by: CoCoRaHS

Wind gusts estimated to be 65 mph flattened a corn field about 3 miles west southwest of Chadwick, IL around 548 pm June 27.

Thunderstorm Wind in MERCER, ILLINOIS
From 27-JUN-09 17:07:00 to 27-JUN-09 17:07:00 (CST-6)
Location: SHERRARD
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to be 60 mph 1 mile west southwest of Sherrard, IL around 607 pm June 27.  A power outage was also observed.

Thunderstorm Wind in WHITESIDE, ILLINOIS
From 27-JUN-09 17:15:00 to 27-JUN-09 17:15:00 (CST-6)
Location: STERLING
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 70 mph blew down a large tree at Avenue J and 6th St in Sterling, IL around 615 pm June 27.  The tree snapped some power lines and blocked the road.  Several other smaller branches were also blown down.

Thunderstorm Wind in CARROLL, ILLINOIS
From 27-JUN-09 16:22:00 to 27-JUN-09 16:22:00 (CST-6)
Location: MARCUS
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wind gusts estimated to be 70 mph blew down some trees and branches about 4 miles north of Savanna, IL around 522 pm June 27.  A power outage was also observed.

Thunderstorm Wind in WHITESIDE, ILLINOIS
From 27-JUN-09 16:45:00 to 27-JUN-09 16:45:00 (CST-6)
Location: USTICK
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MERCER, ILLINOIS
From 27-JUN-09 16:48:00 to 27-JUN-09 16:48:00 (CST-6)
Location: HAMLET
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to be 50 to 60 mph in Reynolds, IL around 548 pm June 27.

Thunderstorm Wind in MCDONOUGH, ILLINOIS
From 27-JUN-09 19:00:00 to 27-JUN-09 19:00:00 (CST-6)
Location: MACOMB
Magnitude: 61.00 EG
Property damage: 0.10K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph broke the Macomb, IL welcome sign on the east side of town around 800 pm June 27.