In the final update before Thursday Morning, the Storm Prediction Center in Norman, OK has expanded the slight risk area for severe weather tomorrow. Of most interest in the push further east of the slight risk area to include most of the state. The running theory is that widespread and damaging winds will become the primary threat after storms develop Thursday afternoon.
Development is expected to take place in the mid to late afternoon in western Iowa or slightly further west. There are good indicators of a tornado threat in the first couple hours of severe weather, but the speed at which these storms are expected to move on Thursday gives a strong sign that a large wind event could occur across most of Iowa.
This all means if it comes together as forecasted, Iowa could be in store for an overnight severe weather event as squall lines move from west to east. And that’s not all, depending on how the storms clear out in the early to late afternoon hours of Friday, another threat for severe weather exists across the eastern half of Iowa for Friday. Again the primary threat appears to be strong, damaging winds.
We’ll monitor changes to the forecast in the coming hours and bring you more updates tonight and tomorrow morning when/if needed.