A line of thunderstorms pivoted northeast into parts of southeast Iowa during the mid-morning hours of June 1st.  Much of the area was just breaking out of a blanket of dense fog where visibilities dropped to less than a quarter mile.  Dew point temperatures were in the middle 60s to around 70 degrees.
The line of storms appeared to become more broken through the late morning hours, while the area from Iowa City to Waterloo appeared to stratify out into a large area of showers.  Just before 12:00 pm CDT, rapid intensification of storm cells on the southeast end of the original line occurred as it moved into northern portions of Louisa County.
A tornado touched down just south of Grandview, IA and moved northeast through Fruitland, IA and on to the southwest parts of Muscatine, IA.  The tornado then lifted and as the storm cell continued to move northeast across Muscatine County.  The super-cell re-intensified as it entered the southeast part of Cedar County just before 1 pm producing a brief tornado near Wilton, IA.  The storm then moved across northwest parts of Scott County and Clinton County producing damaging wind gusts and large hail.  The super-cell continued northeast into Jackson County producing a tornado near Bellevue around 2:30 pm, which moved across the Mississippi River into Jo Daviess County before lifting.  The storm produced yet another tornado just south of Scales Mound, IL around 3:15 pm before moving into southwest Wisconsin and dissipating.
During the early afternoon hours, additional storms strengthened on the south end of the original line of storms, which went on to produce wind damage and large hail as they moved through northwest Illinois through the late afternoon hours.

Tornado in CEDAR, IOWA
From 01-JUN-07 11:44:00 to 01-JUN-07 11:45:00 (CST-6)
Location: LIME CITY
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down about 6 miles southwest of Bennett, IA.  It went through a pasture uprooting some trees.

Tornado in JACKSON, IOWA
From 01-JUN-07 13:28:00 to 01-JUN-07 13:38:00 (CST-6)
Location: SPRINGBROOK
Tornado F-scale: EF2
Property damage: 3.25M
Reported by: NWS Storm Survey

A tornado touched down about 3.5 miles south of Bellevue, IA.  It moved north to county road Z15 and then northeast crossing the Mississippi River just south of Lock and Dam 12 into Jo Daviess County Illinois.  Along the path, damage consisted of snapped and uprooted trees, farm out buildings, and roofs.  The most significant damage occurred near the junction of county highway Z15 and 407th Avenue.  A mobile home was rolled over and destroyed.  The residents of the mobile home had taken shelter in the farm house about 100 feet away.  The farm house only had damaged gutters.

Tornado in MUSCATINE, IOWA
From 01-JUN-07 11:14:00 to 01-JUN-07 11:31:00 (CST-6)
Location: FRUITLAND
Tornado F-scale: EF3
Property damage: 15.00M
Reported by: NWS Storm Survey

A tornado entered into Muscatine County from Louisa County just south of Fruitland, IA.  It progressed to the northeast through the center of Fruitland destroying the post office and city hall building, numerous homes, and overturning some railroad cars.  The tornado weakened as it approached the southwest portions of Muscatine.  In Muscatine, the western sections of town had varying degrees of damage, which was mainly confined to roof damage.  At a car dealership, some cars were displaced.  The tornado eventually lifted on the northeast side of Muscatine near the junction of highways 22 and 61.  Debris from Muscatine and Fruitland fell in Lowden, IA.  Some personal papers were found 1 to 4 miles northwest of Lowden.  Lowden is approximately 30 miles NNE of Muscatine.

Tornado in LOUISA, IOWA
From 01-JUN-07 11:07:00 to 01-JUN-07 11:14:00 (CST-6)
Location: GRANDVIEW
Tornado F-scale: EF3
Property damage: 1.00M
Reported by: NWS Storm Survey

The tornado touched down on the southern edge of Grandview.  It moved through the center of town intensifying in rural areas as it approached the county line.  In Grandview, several homes sustained severe damage.  North of Grandview, about 1.5 miles, a farm house was completely destroyed.  Other homes and trees along the path sustained damage.  The tornado crossed the Louisa-Muscatine county line just south of Fruitland, IA.