St. Louis, MO – A widespread cold surge arriving Thursday, April 30, will drive temperatures 40% to 60% below normal across the Midwest, immediately impacting commuters along I-70, I-55, and I-35 as cooler air settles in for an extended stretch.
According to the National Weather Service, a strong cold front dropping out of the northern Plains will anchor over the region through Tuesday, May 6, keeping temperatures well below seasonal averages. Highs across St. Louis, Kansas City, Des Moines, Springfield, and Indianapolis will hold in the upper 40s to mid-50s, while overnight lows dip into the mid-30s to low 40s.
Morning commutes will see the greatest slowdowns, particularly along major corridors including I-70 from Kansas City to St. Louis and I-55 into central Illinois. Intermittent light rain and damp pavement may reduce visibility and extend drive times, especially during early hours. While precipitation trends remain near normal, localized showers could create brief travel disruptions.
Rural areas across Iowa, northern Missouri, and central Illinois face an added concern: patchy frost during overnight hours. Temperatures nearing the mid-30s could impact early planting and sensitive vegetation. Residents are advised to cover plants and prepare for colder mornings more typical of early spring.
Utilities across the Midwest may see increased demand as heating systems run longer than usual for early May. Winds across open areas of Missouri and Illinois may also add a chill, affecting high-profile vehicles on exposed highways.
This colder-than-normal pattern is expected to persist through May 6, with gradual warming possible beyond that timeframe. Additional updates may refine frost risk and precipitation coverage as the system evolves across the central U.S.
