There are currently no tornado warnings in eastern Iowa
From Morse, credit Clarence Smith:
Video From Mechanicsville, credit Chuck Valenzuela:
Video from north of West Branch in Cedar County:
Video of a funnel cloud near Lancaster, WI, courtesy of Megan Mumm:
The storm stated in Johnson County, midday Saturday and moved East. The Johnson County Emergency Management Agency posted photos and videos of damage on their Facebook page here.
They assessed the tornado a presumptive EF-0, which is the lowest rating on the scale for tornadoes.