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.

Heavy Rain in JACKSON, IOWA
From 17-JUL-06 19:31:00 to 17-JUL-06 19:31:00 (CST)
Location: BELLEVUE
Reported by: TRAINED SPOTTER

street flooding with water curb deep

Thunderstorm Wind in LINN, IOWA
From 17-JUL-06 17:37:00 to 17-JUL-06 17:37:00 (CST)
Location: CEDAR RAPIDS
Magnitude: 57 EG
Reported by: UNKNOWN

Wind estimated at 60 to 70 mph.

Thunderstorm Wind in LINN, IOWA
From 17-JUL-06 17:25:00 to 17-JUL-06 17:25:00 (CST)
Location: FAIRFAX
Magnitude: 52 EG
Reported by: UNKNOWN

Winds estimated at 60 mph flattened corn fields.  Time is estimated.

Thunderstorm Wind in JOHNSON, IOWA
From 17-JUL-06 17:56:00 to 17-JUL-06 18:08:00 (CST)
Location: IOWA CITY
Magnitude: 61 EG
Property damage: 15K
Reported by: TRAINED SPOTTER

Thunderstorm winds downed 6 to 12 inch diameter limbs, uprooted a tree, and blew the plastic out of the Hill Bank sign.  Time is estimated based on radar.

Heavy Rain in JOHNSON, IOWA
From 17-JUL-06 18:00:00 to 17-JUL-06 18:25:00 (CST)
Location: IOWA CITY
Reported by: AMATEUR RADIO

minor street flooding on Riverside Dr south of Burlington Street.

Hail in BENTON, IOWA
From 17-JUL-06 16:59:00 to 17-JUL-06 16:59:00 (CST)
Location: BLAIRSTOWN
Magnitude: 1.75 
Property damage: 3K
Crop damage: 3K
Reported by: EMERGENCY MANAGER

Blairstown Fire reports golfball size hail at the jct of 19th Ave & 77th street

Hail in BENTON, IOWA
From 17-JUL-06 17:04:00 to 17-JUL-06 17:04:00 (CST)
Location: BLAIRSTOWN
Magnitude: 0.88 
Crop damage: 2K
Reported by: EMERGENCY MANAGER

Blairstown Fire reports dime then nickel size hail; also 0.70 inches of rain in ten minutes

Thunderstorm Wind in BENTON, IOWA
From 17-JUL-06 17:09:00 to 17-JUL-06 17:09:00 (CST)
Location: ATKINS
Magnitude: 65 EG
Property damage: 5K
Crop damage: 8K
Reported by: EMERGENCY MANAGER

Estimated 70 to 80 mph winds with big trees down.  A flag pole was bent at the base at the Benton/Linn line; heavy rain also reported

Heavy Rain in LINN, IOWA
From 17-JUL-06 17:05:00 to 17-JUL-06 17:45:00 (CST)
Location: FAIRFAX
Reported by: TRAINED SPOTTER

minor street flooding

Hail in BENTON, IOWA
From 17-JUL-06 16:47:00 to 17-JUL-06 16:47:00 (CST)
Location: BELLE PLAINE
Magnitude: 0.75 
Crop damage: 4K
Reported by: TRAINED SPOTTER

Also estimated 40 to 50 mph winds

Hail in BENTON, IOWA
From 17-JUL-06 16:35:00 to 17-JUL-06 16:35:00 (CST)
Location: KEYSTONE
Magnitude: 1.50 
Property damage: 2K
Crop damage: 5K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in BENTON, IOWA
From 17-JUL-06 17:01:00 to 17-JUL-06 17:01:00 (CST)
Location: LUZERNE
Magnitude: 52 EG
Property damage: .5K
Crop damage: 4K
Reported by: BROADCAST MEDIA

1 to 2 inch diameter limbs down; winds estimated at 60 mph

Thunderstorm Wind in BENTON, IOWA
From 17-JUL-06 16:46:00 to 17-JUL-06 16:46:00 (CST)
Location: VINTON
Magnitude: 52 EG
Crop damage: 3K
Reported by: EMERGENCY MANAGER

Estimated 60 mph winds

Thunderstorm Wind in BENTON, IOWA
From 17-JUL-06 16:49:00 to 17-JUL-06 16:49:00 (CST)
Location: VINTON
Magnitude: 52 EG
Crop damage: 3K
Reported by: EMERGENCY MANAGER

Jct of 64th street & 23rd Ave

Hail in JEFFERSON, IOWA
From 17-JUL-06 18:00:00 to 17-JUL-06 18:00:00 (CST)
Location: PACKWOOD
Magnitude: 1.00 
Property damage: 2K
Crop damage: 3K
Reported by: GENERAL PUBLIC

quarter size hail

Thunderstorm Wind in JOHNSON, IOWA
From 17-JUL-06 18:15:00 to 17-JUL-06 18:15:00 (CST)
Location: SHARON CENTER
Magnitude: 52 EG
Crop damage: 10K
Reported by: GENERAL PUBLIC

Corn flattened.  Time is estimated based on radar.

Thunderstorm Wind in WASHINGTON, IOWA
From 17-JUL-06 18:37:00 to 17-JUL-06 18:45:00 (CST)
Location: WASHINGTON
Magnitude: 57 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

2 to 3 inch diameter branches down

Thunderstorm Wind in JACKSON, IOWA
From 17-JUL-06 19:26:00 to 17-JUL-06 19:35:00 (CST)
Location: BELLEVUE
Magnitude: 57 EG
Property damage: 1K
Reported by: GENERAL PUBLIC

3 to 4 inch diameter solid branches down.  Time is estimated based on radar.

Heavy Rain in BENTON, IOWA
From 17-JUL-06 17:05:00 to 17-JUL-06 18:05:00 (CST)
Location: WALFORD
Reported by: TRAINED SPOTTER

1.5 inches of rain in the past hour

Hail in BENTON, IOWA
From 17-JUL-06 17:04:00 to 17-JUL-06 17:04:00 (CST)
Location: BLAIRSTOWN
Magnitude: 0.88 
Crop damage: 2K
Reported by: FIRE DEPT/RESCUE SQUAD

Norway Fire reports nickel size hail at the jct of 23rd Ave & 79th street

Hail in KEOKUK, IOWA
From 17-JUL-06 17:45:00 to 17-JUL-06 17:45:00 (CST)
Location: OLLIE
Magnitude: 1.00 
Property damage: 2K
Crop damage: 4K
Reported by: TRAINED SPOTTER

quarter size hail

Heavy Rain in WASHINGTON, IOWA
From 17-JUL-06 17:45:00 to 17-JUL-06 18:40:00 (CST)
Location: WASHINGTON
Reported by: TRAINED SPOTTER

1 inch of rain in the past hour

Hail in KEOKUK, IOWA
From 17-JUL-06 17:52:00 to 17-JUL-06 17:52:00 (CST)
Location: OLLIE
Magnitude: 1.00 
Property damage: 2K
Reported by: TRAINED SPOTTER

nickel to quarter size hail

Thunderstorm Wind in LINN, IOWA
From 17-JUL-06 17:15:00 to 17-JUL-06 17:34:00 (CST)
Location: COUNTYWIDE
Magnitude: 57 EG
Property damage: 3K
Crop damage: 20K
Reported by: TRAINED SPOTTER

Across the southwest part of the county.  Thunderstorm winds flattened considerable amounts of corn in rural areas.  Based on radar data the following times have been established for the two cities affected; Fairfax 1723-1728 CST, southwest areas of Cedar Rapids 1728-1737 CST.  Spotters also estimated winds of 60 to 70 mph near the Cedar Rapids Airport.

Thunderstorm Wind in JOHNSON, IOWA
From 17-JUL-06 17:44:00 to 17-JUL-06 17:44:00 (CST)
Location: TIFFIN
Magnitude: 50 EG
Property damage: 5K
Reported by: AMATEUR RADIO

power lines down

Hail in DELAWARE, IOWA
From 17-JUL-06 17:50:00 to 17-JUL-06 17:50:00 (CST)
Location: RYAN
Magnitude: 0.88 
Crop damage: 3K
Reported by: FIRE DEPT/RESCUE SQUAD

penny to nickel size hail for 5 minutes

Thunderstorm Wind in IOWA, IOWA
From 17-JUL-06 17:24:00 to 17-JUL-06 17:24:00 (CST)
Location: MARENGO
Magnitude: 70 EG
Property damage: 15K
Reported by: TRAINED SPOTTER

Trees & limbs down; roof partially off a business

Hail in BUCHANAN, IOWA
From 17-JUL-06 16:19:00 to 17-JUL-06 16:21:00 (CST)
Location: BRANDON
Magnitude: 0.75 
Crop damage: 2K
Reported by: GENERAL PUBLIC

dime size hail

Funnel Cloud in BENTON, IOWA
From 17-JUL-06 16:23:00 to 17-JUL-06 16:25:00 (CST)
Location: BELLE PLAINE
Reported by: TRAINED SPOTTER

Just east of the Benton/Poweshiek line

Hail in BENTON, IOWA
From 17-JUL-06 16:41:00 to 17-JUL-06 16:43:00 (CST)
Location: KEYSTONE
Magnitude: 1.25 
Property damage: 4K
Crop damage: 2K
Reported by: TRAINED SPOTTER

Dime then quarter to half dollar size hail

Thunderstorm Wind in BENTON, IOWA
From 17-JUL-06 17:11:00 to 17-JUL-06 17:15:00 (CST)
Location: ATKINS
Magnitude: 70 EG
Property damage: 5K
Crop damage: 10K
Reported by: LAW ENFORCEMENT

Trees down on 33rd Ave south of town and on 74th street south of town