Iowans are no strangers to thunderstorms after numerous rounds of storm systems that produced heavy rain, but little or no severe weather. That’s about to change as a stronger storm system makes its way into Iowa beginning tomorrow.
You can see in the graphic to the left that a slight risk is posted for much of Iowa on Thursday As a frontal boundary approaches Iowa from the west, the atmosphere is expected to destabilize Thursday. Storms should first fire to the north along the boundary in Minnesota and the Dakotas. Eventually, storms will also fire in western Iowa.
You can see in the graphic to the right that the greatest risk for severe weather lies across the western half of Iowa. All modes of severe weather are possible as this storm system moves through. As the overnight hours wear on it’s expected storms will move through central and eastern Iowa and could produce strong winds and large hail into the morning hours.
Storm chasers will likely eyeball some better conditions for tornadoes to the north of Iowa on Thursday, but we’ll keep a close eye on the northwest part of the state tomorrow for a possible chase.
As for Friday, the system is expected to fire again across portions of central and eastern Iowa before moving off into Illinois. Again, all modes of severe weather are possible, but at this time it does not carry as high of a tornado risk as Thursday.
Further out, more rounds of showers and thunderstorms are possible over the weekend and next week. It’s too early to tell whether severe weather is possible for any of these coming days, but it is certainly a possibility.
We’ll continue to monitor changes to tomorrow’s forecast and provide updates when we can on the threat facing Iowa to finish off the week.