Des Moines, IA – A migrating heat dome is set to push temperatures into the upper 70s and low 80s across Iowa within days, while repeated rounds of heavy rain raise the risk of flooding and travel disruptions through early April.
According to the National Weather Service Climate Prediction Center, Iowa falls within a 40 to 60 percent probability of above-normal temperatures from April 3 through April 9, paired with a 60 to 70 percent chance of above-normal precipitation. Highs in Des Moines, Cedar Rapids, and Davenport are expected to run 10 to 15 degrees above seasonal averages, with widespread 80s likely.
Iowa sits along the northern edge of the heat dome, where warm, moisture-rich air collides with incoming storm systems. This setup supports repeated rounds of showers and thunderstorms capable of producing heavy rainfall and localized flooding.
Rain chances remain elevated statewide, with the heaviest downpours likely impacting major corridors including I-80, I-35, and I-380. Drivers could encounter water-covered roads and reduced visibility, especially during evening and overnight travel periods.
Residents are urged to stay alert for rapidly changing conditions, avoid flood-prone roadways, and ensure devices are charged in case of isolated outages.
This pattern is expected to persist through April 3–9, with additional advisories likely as rainfall totals and storm timing become more defined.
