An upper level disturbance initiated two supercell thunderstorms in a moist to near tropical atmosphere that was ahead of a cold front in eastern Iowa.  Outflow from the supercells developed a broken line of of storms that moved through Iowa and into Illinois and Missouri.  The line produced sporatic pulse severe storms from east central Iowa into northwest Illinois.  The more solid part of the line produced a considerable amount of severe weather from east central Iowa into northern Missouri.

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 17-JUL-06 19:30:00 to 17-JUL-06 19:30:00 (CST)
Location: HANOVER
Magnitude: 52 EG
Crop damage: 3K
Reported by: TRAINED SPOTTER

large trees bending over

Thunderstorm Wind in CARROLL, ILLINOIS
From 17-JUL-06 20:13:00 to 17-JUL-06 20:13:00 (CST)
Location: LANARK
Magnitude: 57 EG
Property damage: 3K
Reported by: AMATEUR RADIO

trees down blocking the road

Thunderstorm Wind in STEPHENSON, ILLINOIS
From 17-JUL-06 20:15:00 to 17-JUL-06 20:15:00 (CST)
Location: FREEPORT
Magnitude: 57 EG
Property damage: 5K
Reported by: TRAINED SPOTTER

6 to 8 inch diameter braches down on some roads in the southwest part of the city.  Some partially rotted whole trees also down.

Thunderstorm Wind in CARROLL, ILLINOIS
From 17-JUL-06 20:10:00 to 17-JUL-06 20:13:00 (CST)
Location: SHANNON
Magnitude: 52 EG
Property damage: 2K
Crop damage: 2K
Reported by: LAW ENFORCEMENT

tree down at the jct of Shannon & Locust Rds

Thunderstorm Wind in STEPHENSON, ILLINOIS
From 17-JUL-06 20:21:00 to 17-JUL-06 20:21:00 (CST)
Location: BOLTON
Magnitude: 61 MG
Crop damage: 4K
Reported by: EMERGENCY MANAGER

measured 70 mph gust at the jct of Bolton & Prairie Rds

Hail in JO DAVIESS, ILLINOIS
From 17-JUL-06 19:30:00 to 17-JUL-06 19:30:00 (CST)
Location: HANOVER
Magnitude: 1.00 
Property damage: 2K
Crop damage: 3K
Reported by: TRAINED SPOTTER

penny to quarter size hail

Thunderstorm Wind in STEPHENSON, ILLINOIS
From 17-JUL-06 19:58:00 to 17-JUL-06 19:58:00 (CST)
Location: LORAN
Magnitude: 61 MG
Crop damage: 4K
Reported by: TRAINED SPOTTER

measured 70 mph gust on the Jo Daviess/Stephenson line

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 17-JUL-06 19:33:00 to 17-JUL-06 19:42:00 (CST)
Location: ELIZABETH
Magnitude: 57 EG
Property damage: 3K
Crop damage: 7K
Reported by: OFFICIAL NWS OBS.

trees and corn down

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 17-JUL-06 19:34:00 to 17-JUL-06 19:40:00 (CST)
Location: HANOVER
Magnitude: 57 EG
Property damage: 3K
Reported by: TRAINED SPOTTER

Trees down. Estimated 56 to 63 knot (65 to 75 mph) winds

Thunderstorm Wind in CARROLL, ILLINOIS
From 17-JUL-06 19:51:00 to 17-JUL-06 19:55:00 (CST)
Location: MS PALLISADES SP
Magnitude: 52 EG
Property damage: 2K
Reported by: LAW ENFORCEMENT

tree down on Ridge Rd

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 17-JUL-06 19:58:00 to 17-JUL-06 19:58:00 (CST)
Location: ELMOVILLE
Magnitude: 61 MG
Crop damage: 4K
Reported by: TRAINED SPOTTER

measured 70 mph gust on the Jo Daviess/Stephenson line

Thunderstorm Wind in CARROLL, ILLINOIS
From 17-JUL-06 19:58:00 to 17-JUL-06 20:01:00 (CST)
Location: MT CARROLL
Magnitude: 52 EG
Property damage: 1K
Crop damage: 3K
Reported by: LAW ENFORCEMENT

tree down on highway 78 on the Jo Daviess/Carroll line

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 17-JUL-06 19:58:00 to 17-JUL-06 20:01:00 (CST)
Location: ELMOVILLE
Magnitude: 52 EG
Property damage: 1K
Crop damage: 3K
Reported by: LAW ENFORCEMENT

tree down on highway 78 on the Jo Daviess/Carroll line