As expected, the risk was increased for tomorrow from marginal risk to slight risk for north central and central portions of Iowa. There will be a tight window at which severe weather may be possible, and that will be at the very onset of development with this storm. With this threat, all severe nodes of weather are possible, including isolated tornadoes. At this time, the window of severe potential is between 3PM and 7PM.
As you can see below nearly all of western and central Iowa are in High Wind Warnings, with eastern Iowa in a High Wind Watch. Here is the difference. A high wind watch means that you will have winds of 25 to 35 mph, with gusts up to 60 MPH. A high wind warning however, means the winds will be 30-40 mph with gusts up to 60-70 mph. The wind event will start Wednesday AM and peak speeds will be reached around Noon to mid afternoon in many locations.